GOODWIN, J.
A trial jury denied plaintiffs the compensation which they sought in an action for “inverse condemnation”.
The issues in their broadest sense concern the rights of landowners adjacent to airports and the rights of the public in the airspace near the ground. Specifically, we must decide whether a noise-nuisance can amount to a taking.
[181]*181The Port of Portland owns and operates the Portland International Airport. It has the power of eminent domain. It has used this power to surround itself with a substantial curtilage, but its formal acquisition stopped short of the land of the plaintiffs. For the purposes of this case, the parties have assumed that the Port is immune from ordinary tort liability. Further, it is conceded that injunctive relief would not be in the public interest. Aircraft are not ordinarily operated by the Port itself, but by third parties which use its facilities. Air navigation and other related operations are, for all practical purposes, regulated by a federal agency. The Port merely holds the airport open to the flying public.
The plaintiffs own and reside in a dwelling house located about 6,000 feet beyond the end of one runway and directly under the glide path of aircraft using it. Their land lies about 1,500 feet beyond the end of a second runway, but about 1,000 feet to one side of the glide path of aircraft using that runway.
The plaintiffs contend that flights from both runways have resulted in a taking of their property. Their principal complaint is that the noise from jet aircraft makes their land unusable. The jets use a runway the center line of which, if extended, would pass about 1,000 feet to one side of the plaintiffs’ land. Some planes pass directly over the plaintiffs’ land, but these are not, for the most part, the civilian and military jets which cause the most noise.
The plaintiffs’ ease proceeded on two theories: (1) Systematic flights directly over their land cause a substantial interference with their use and enjoyment of that land. This interference constitutes a nuisance. Such a nuisance, if persisted in by a private party, could ripen into a prescription. Such a [182]*182continuing nuisance, when maintained by government, amounts to the taking of an easement, or, more precisely, presents a jury question whether there is a taking. (2) Systematic flights which pass close to their land, even though not directly overhead, likewise constitute the taking of an easement, for the same reasons, and upon the same authority.
The Port of Portland contends that its activities do not constitute the taking of easements in the plaintiffs’ land. The Port argues: (1) The plaintiffs have no right to exclude or protest flights directly over their land, if such flights are so high as to be in the public domain, i.e., within navigable airspace as defined by federal law.② (2) The plaintiffs have no right to protest flights which do not cross the airspace above their land, since these could commit no trespass in any event. Accordingly, the Port contends, there is no interference with any legally protected interest of the plaintiffs and thus no taking of any property for which the plaintiffs are entitled to compensation. In short, the Port’s theory is that the plaintiffs must endure the noise of the nearby airport with the same forbearance that is required of those who live near highways and railroads. The [183]*183Port’s arguments, supported as they are by substantial authority, prevailed in the lower court, even though they were not entirely responsive to the plaintiffs’ case. (The plaintiffs founded their case upon a nuisance theory; the defendant answered that there was no trespass.)
The trial court proceeded as if the rights of the plaintiffs were limited 'by the imaginary lines that would describe a cube of airspace exactly 500 feet high and bounded on four sides by perpendicular extensions of the surface boundaries of their land. The trial court thus in effect adapted the law of trespass to the issues presented in this case, and held that unless there was a continuing trespass within the described cube of space there could be no recovery. The trial court accordingly adopted the view that even if there was a nuisance, a nuisance could not give rise to a taking.
This appeal requires us to decide whether, under the circumstances of this ease, the landowner has a right to have the jury pass upon his claim. If we so hold, then we have necessarily decided that the owner’s interest in the use of his land free from the inconvenience of noise coming in upon him from outside his boundaries is an interest for the taking of which the government must pay. It would, of course, remain for the jury, under proper instructions, to decide when such a taking has occurred.
There is no doubt that noise can be a nuisance. See cases collected in Annotation, 44 ALR2d 1381, 1394 (1953) (dance halls); Lloyd, Noise As a Nuisance, 82 Pa L Rev 567 (1934); de Funiak, Equitable Belief Against Nuisances, 38 Ky L J 223 (1949); and Notes, 15 Or L Rev 268 (1936). At common law, one could obtain a prescriptive right to impose an unreasonable noise upon one’s neighbor, and hence an [184]*184easement for a nuisance. Sturges v. Bridgman, LE 11 Ch D 852 (1879); Eestatement, Property, § 451, Comment a. (The authorities do not all agree about when the prescriptive period begins to run,③ but that problem is not before us now.) It is clear that freedom from unreasonable noise is a right which, in a proper case, the law will protect. On similar principles, offensive smells are treated as nuisances for which a remedy will lie. See cases collected in Annotation, 18 ALR2d 1033 (1950) (slaughterhouse). It is equally clear that a reasonable volume of noise (like a reasonable olfactory insult from industrial odors) must be endured as the price of living in a modern industrial society. See generally Eestatement, Torts, §§ 822-831. Freedom from noise can be a legally protected right.
We come then to the facts of the ease at bar. At the outset the parties concede that because of the wording of the Oregon Constitution, Art I, § 18 (eminent domain), a plaintiff aggrieved by a public activity must show that there has been a taking of his property. There must be more than merely the suffering of some damage. See, e.g., Moeller et ux v. Multnomah County, 218 Or 413, 424, 430, 345 P2d 813 (1959) (See Note, 40 Or L Rev 241 (1961)); Tomasek v. Oregon Highway Com’n, supra note 1.
A taking within the meaning of Oregon Constitu[185]*185tion, Art I, § 18, has been defined as “any destruction, restriction or interruption of the common and necessary use and enjoyment of the property of a person for a public purpose * * Morrison v. Clackamas County, 141 Or 564, 568, 18 P2d 814 (1933). .See Note, 16 Or L Eev 155 (1937). The definition from Morrison v. Clackamas County, supra, is broad enough to cover a continuing nuisance, and hence the plaintiffs’ case, unless there is some policy reason for limiting its application.
Since United States v. Causby, 328 US 256, 66 S Ct 1062, 90 L Ed 1206 (1946), and particularly since Griggs v. Allegheny County,
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GOODWIN, J.
A trial jury denied plaintiffs the compensation which they sought in an action for “inverse condemnation”.
The issues in their broadest sense concern the rights of landowners adjacent to airports and the rights of the public in the airspace near the ground. Specifically, we must decide whether a noise-nuisance can amount to a taking.
[181]*181The Port of Portland owns and operates the Portland International Airport. It has the power of eminent domain. It has used this power to surround itself with a substantial curtilage, but its formal acquisition stopped short of the land of the plaintiffs. For the purposes of this case, the parties have assumed that the Port is immune from ordinary tort liability. Further, it is conceded that injunctive relief would not be in the public interest. Aircraft are not ordinarily operated by the Port itself, but by third parties which use its facilities. Air navigation and other related operations are, for all practical purposes, regulated by a federal agency. The Port merely holds the airport open to the flying public.
The plaintiffs own and reside in a dwelling house located about 6,000 feet beyond the end of one runway and directly under the glide path of aircraft using it. Their land lies about 1,500 feet beyond the end of a second runway, but about 1,000 feet to one side of the glide path of aircraft using that runway.
The plaintiffs contend that flights from both runways have resulted in a taking of their property. Their principal complaint is that the noise from jet aircraft makes their land unusable. The jets use a runway the center line of which, if extended, would pass about 1,000 feet to one side of the plaintiffs’ land. Some planes pass directly over the plaintiffs’ land, but these are not, for the most part, the civilian and military jets which cause the most noise.
The plaintiffs’ ease proceeded on two theories: (1) Systematic flights directly over their land cause a substantial interference with their use and enjoyment of that land. This interference constitutes a nuisance. Such a nuisance, if persisted in by a private party, could ripen into a prescription. Such a [182]*182continuing nuisance, when maintained by government, amounts to the taking of an easement, or, more precisely, presents a jury question whether there is a taking. (2) Systematic flights which pass close to their land, even though not directly overhead, likewise constitute the taking of an easement, for the same reasons, and upon the same authority.
The Port of Portland contends that its activities do not constitute the taking of easements in the plaintiffs’ land. The Port argues: (1) The plaintiffs have no right to exclude or protest flights directly over their land, if such flights are so high as to be in the public domain, i.e., within navigable airspace as defined by federal law.② (2) The plaintiffs have no right to protest flights which do not cross the airspace above their land, since these could commit no trespass in any event. Accordingly, the Port contends, there is no interference with any legally protected interest of the plaintiffs and thus no taking of any property for which the plaintiffs are entitled to compensation. In short, the Port’s theory is that the plaintiffs must endure the noise of the nearby airport with the same forbearance that is required of those who live near highways and railroads. The [183]*183Port’s arguments, supported as they are by substantial authority, prevailed in the lower court, even though they were not entirely responsive to the plaintiffs’ case. (The plaintiffs founded their case upon a nuisance theory; the defendant answered that there was no trespass.)
The trial court proceeded as if the rights of the plaintiffs were limited 'by the imaginary lines that would describe a cube of airspace exactly 500 feet high and bounded on four sides by perpendicular extensions of the surface boundaries of their land. The trial court thus in effect adapted the law of trespass to the issues presented in this case, and held that unless there was a continuing trespass within the described cube of space there could be no recovery. The trial court accordingly adopted the view that even if there was a nuisance, a nuisance could not give rise to a taking.
This appeal requires us to decide whether, under the circumstances of this ease, the landowner has a right to have the jury pass upon his claim. If we so hold, then we have necessarily decided that the owner’s interest in the use of his land free from the inconvenience of noise coming in upon him from outside his boundaries is an interest for the taking of which the government must pay. It would, of course, remain for the jury, under proper instructions, to decide when such a taking has occurred.
There is no doubt that noise can be a nuisance. See cases collected in Annotation, 44 ALR2d 1381, 1394 (1953) (dance halls); Lloyd, Noise As a Nuisance, 82 Pa L Rev 567 (1934); de Funiak, Equitable Belief Against Nuisances, 38 Ky L J 223 (1949); and Notes, 15 Or L Rev 268 (1936). At common law, one could obtain a prescriptive right to impose an unreasonable noise upon one’s neighbor, and hence an [184]*184easement for a nuisance. Sturges v. Bridgman, LE 11 Ch D 852 (1879); Eestatement, Property, § 451, Comment a. (The authorities do not all agree about when the prescriptive period begins to run,③ but that problem is not before us now.) It is clear that freedom from unreasonable noise is a right which, in a proper case, the law will protect. On similar principles, offensive smells are treated as nuisances for which a remedy will lie. See cases collected in Annotation, 18 ALR2d 1033 (1950) (slaughterhouse). It is equally clear that a reasonable volume of noise (like a reasonable olfactory insult from industrial odors) must be endured as the price of living in a modern industrial society. See generally Eestatement, Torts, §§ 822-831. Freedom from noise can be a legally protected right.
We come then to the facts of the ease at bar. At the outset the parties concede that because of the wording of the Oregon Constitution, Art I, § 18 (eminent domain), a plaintiff aggrieved by a public activity must show that there has been a taking of his property. There must be more than merely the suffering of some damage. See, e.g., Moeller et ux v. Multnomah County, 218 Or 413, 424, 430, 345 P2d 813 (1959) (See Note, 40 Or L Rev 241 (1961)); Tomasek v. Oregon Highway Com’n, supra note 1.
A taking within the meaning of Oregon Constitu[185]*185tion, Art I, § 18, has been defined as “any destruction, restriction or interruption of the common and necessary use and enjoyment of the property of a person for a public purpose * * Morrison v. Clackamas County, 141 Or 564, 568, 18 P2d 814 (1933). .See Note, 16 Or L Eev 155 (1937). The definition from Morrison v. Clackamas County, supra, is broad enough to cover a continuing nuisance, and hence the plaintiffs’ case, unless there is some policy reason for limiting its application.
Since United States v. Causby, 328 US 256, 66 S Ct 1062, 90 L Ed 1206 (1946), and particularly since Griggs v. Allegheny County, 369 US 84, 82 S Ct 531, 7 L Ed2d 585 (1962), we know that easements can be taken by repeated low-level flights over private land. Such easements have been found in actions against the federal government (Causby) and in actions against municipal corporations {Griggs). When such easements are said to have been taken, compensation must be paid to the owners of the lands thus burdened. This much appears to be settled.
It is not so well settled, however, that the easements discussed in the Causby and Griggs cases are easements to impose upon lands near an airport a servitude of noise. Courts operating upon the theory that repeated trespasses form the basis of the easement have not found it necessary to decide whether a repeated nuisance, which may or may not have been an accompaniment of a trespass, could equally give rise to a servitude upon neighboring land. It must be remembered that in both the Causby and Griggs cases the flights were virtually at tree-top level. Accordingly, both decisions could perhaps be supported on trespass theories exclusively. Following the Causby case, several federal district courts held that while [186]*186repeated flights at low levels directly over private land may amount to a taking for which compensation must be paid, repeated flights nearby but not directly overhead must be endured as mere “damages” which, for various reasons, may not be compensable. See, e.g., Moore v. United States, 185 F Supp 399 (ND Tex 1960); Freeman v. United States, 167 F Supp 541 (WD Okla 1958); and see Cheskov v. Port of Seattle, 55 Wash2d 416, 348 P2d 673 (1960), where the court found no taking, but held that damages might be recoverable in a proper case under the Washington constitution.④
After the case at bar had been argued and submitted, the United States Court of Appeals for the Tenth Circuit, which had previously held in Batten v. United States, 292 F2d 144 (10th Cir 1961), that a complaint sounding substantially in nuisance stated a cause of action under circumstances very like those now before us, held, on the merits in the same case, that the interference with the use and enjoyment of the land complained of was a consequential damage not amounting to a taking, and adopted the rule that there must be a trespass before there can be a taking. Batten v. United States, 306 F2d 580 (10th Cir 1962). As pointed out in a dissent by Murrah, Chief Judge, the interference proven was substantial enough to [187]*187impose a servitude upon the lands of the plaintiffs, and under the Gausby and Griggs cases equally could have constituted a talking. 306 F2d at 585. In view of the importance of the question presented in the Batten case, and in view of the strong dissent by the chief judge, it would be premature to speculate now upon the final direction the federal courts will take. We believe the dissenting view in the Batten case presents the better-reasoned analysis of the legal principles involved, and that if the majority view in the Batten ease can be defended it must be defended frankly upon the ground that considerations of public policy justify the result: i.e., that private rights must yield to public convenience in this class of cases. The rationale of the case is circular. The majority said in effect that there is no taldng because the damages are consequential, and the damages are consequential because there is no taldng.
As we noted in a recent case which involved a different aspect of the airport problem,⑤ some of the decisions reveal internal ambivalence with reference to the theory upon which they proceed. In perhaps the leading ease, United States v. Gausby, supra, the court used language appropriate to the law of trespass more or less interchangeably with language appropriate to the law of nuisance.⑥ It appears that [188]*188the majority in the Batten case accepted the rule that only a trespass in the airspace directly overhead can give rise to an action for a taking, and that nuisance principles ought not to be applied in actions against the government. This may be a cogent policy argument, but it does violence to the law of servitudes.
The fact that the defendant in the case at bar is a governmental agency is of obvious importance, but, before we can decide whether to adopt one rule for governmental defendants and another for private parties, we need to know what the alternatives are. We need to know what the constitutional protection of private property means when balanced against those policy considerations which arise out of the governmental character of the defendant. In other words, as is frequently the case, we must balance apparently conflicting principles before we can tell whether or not this particular case is one for the jury.
While not every wrong committed by government will amount to a taking of private property, there are some wrongs which do constitute a taking. See, e.g., Cereghino et al v. State Hwy. Com., 230 Or 439, 370 P2d 694 (1962), and Moeller et ux v. Multnomah County, supra. Many of these wrongs involve trespassory activities. The inquiry must not beg the question, however, whether a nuisance can also amount to a taking. Whether a nuisance has, in fact, produced the results alleged by the plaintiff in this case is another matter; first we must decide whether a nuisance can ever constitute a taking. If there is a taldng, then what is taken must be paid for. Armstrong v. United States, 364 US 40, 48, 80 S Ct 1563, 4 L Ed2d 1554 (1960). And see Annotation, 84 ALR 2d 348, Eminent Domain — View—Interference (1962).
[189]*189The subject matter of inverse condemnation is always private property. Narrowed down to a meaningful definition for the purposes of this case, however, the only “property” right of the possessor of land which has any value is his ability to use and enjoy his land. This is true whatever estate the possessor holds, whether in fee, or for life, or for years, or merely an incorporeal interest such as an easement or profit. See Ackerman v. Port of Seattle, 55 Wash2d 400, 348 P2d 664, 77 ALR2d 1344 (1960). If the government substantially deprives the owner of the use of his land, such deprivation is a taking for which the government must pay.⑦ Cereghmo et al v. State Hwg. Com., supra; Ackerman v. Port of Seattle, supra. If, on the other hand, the government merely commits some tort which does not deprive the owner of the use of his land, then there is no taking.⑧
[190]*190Therefore, unless there is some reason of public policy which bars compensation in cases of governmental nuisance as a matter of law, there is a question, in each ease, as a matter of fact, whether or not the governmental activity complained of has resulted in so substantial an interference with use and enjoyment of one’s land as to amount to a taking of private property for public use. This factual question, again barring some rule which says we may not ask it, is equally relevant whether the taking is trespassory or by a nuisance. A nuisance can be such an invasion of the rights of a possessor as to amount to a taking, in theory at least, any time a possessor is in fact ousted from the enjoyment of his land.
It now becomes relevant to consider whether a jury ought to be permitted to find that a given nuisance is so aggravated as to be a taking when the perpetrator of the nuisance happens to be the government. The Port argues that the plight of the plaintiffs in this case is indistinguishable from that of thousands of their fellow countrymen whose homes abut highways and railroads and who endure the noise without complaint. Granting the similarity, it must be noted, however, that the matter is one of degree.⑨ "We do not decide that the positions of the parties are the same. The Port points to our previous decisions in support of the proposition that nuisance (nontrespassory) invasions by government are not compensable. The eases cited by the Port did not, however, hold that a nuisance so aggravated as to amount to a complete ouster or deprivation of the beneficial use of property was not a talcing. That [191]*191question does not appear to have been passed upon by our court. But cf. Wilson v. City of Portland, 132 Or 509, 514, 285 P 1030 (1930), where there is dictum to the effect that nontrespassory incursions give rise to no liability. There are cases elsewhere which tend to support the Port’s theory that nuisances, when committed by government, are “legal” and therefore can never be a taking in the constitutional sense, but must always be endured with fortitude. Indeed, some authorities hold that the king can do no wrong and that the government never perpetrates a nuisance. See cases noted in 66 CJS, Nuisances 761, § 17. Again “lawful” nuisances have been held to be of such public desirability (utility) that only those portions of the invasion that could be severed from the whole and characterized as trespass could be considered in an action for damages. See, e.g., Richards v. Washington Terminal Co., 233 US 546, 34 S Ct 654, 58 L Ed 1088, LRA 1915A 887 (1914), holding that railroad noises and smoke (but not soot) must be endured where the conduct that created the nuisance is in the public interest and has been encouraged by law. The reason for assigning mystical power to trespass guare clausum fregit is elusive. But Richards v. Washington Terminal Co. did not say that the public interest demands that all governmentally approved activities (except trespass) be endured without compensation. We have found no case which goes that far, and we doubt that the constitutional right to compensation can be so construed.
The plaintiffs concede that single-instance torts, as torts, are not compensable. Inverse condemnation, however, provides the remedy where an injunction would not be in the public interest, and where the continued interference amounts to a taking for which [192]*192the constitution demands a remedy. In summary, a taking occurs whenever government acts in such a way as substantially to deprive an owner of the useful possession of that which he owns, either by repeated trespasses or by repeated nontrespassory invasions called “nuisance”. If reparations are to be denied, they should be denied for reasons of policy which are themselves strong enough to counterbalance the constitutional demand that reparations be paid. None has been pointed out to us in this case.
If we accept, as we must upon established-principles of the law of servitudes, the validity of the propositions that a noise can be a nuisance; that a nuisance can give rise to an easement; and that a noise coming straight down from above one’s land can ripen into a taking if it is persistent enough and aggravated enough, then logically the same kind and degree of interference with the use and enjoyment of one’s land can also be a taking even though the noise vector may come from some direction other than the perpendicular.
If a landowner has a right to be free from unreasonable interference caused by noise, as we hold that he has, then when does the noise burden become so unreasonable that the government must pay for the privilege of being permitted to continue to make the noise? Logically, the answer has to be given by the trier of fact (subject to the usual exercise of the proper function of the court in screening the evidence). See Restatement, Torts, § 826, Comment d. It may be contended that the jury is an imperfect instrument in these cases, but such an argument raises constitutional and legislative questions that are not now before us. See Holden v. Pioneer Broadcasting Co., 228 Or 405, 365 P2d 845.
[193]*193"While it is no doubt anticipatory to advert to the problem of instructing the jury in cases of this kind, it is relevant to point out that the nuisance theory provides the jury a useful method for balancing the gravity of the harm to the plaintiff against the social utility of the airport’s conduct, in a way that would not be available if the trespass theory were used. In Restatement, Torts, §§ 826-831, we find principles for balancing gravity against utility which can be adapted to jury instruction so that the question of reasonableness need not be any more mysterious to the jury in this type of case than it is in an automobile accident case. The balancing of private rights and public necessity is not a novel problem.⑩
Whether expressed in so many words or not, the principle found in the Gausby, Griggs and Ackerman cases is that when the government conducts an activity upon its own land which, after balancing the question of reasonableness, is sufficiently disturbing to the use and enjoyment of neighboring lands to amount to a taking thereof, then the public, and not the subservient landowner, should bear the cost of such public benefit. Under this principle, it was error to exclude the plaintiffs’ proffered testimony concerning the jet flights near his land. The real question was not one of perpendicular extension of surface boundaries into the airspace, but a question of [194]*194reasonableness based upon nuisance theories.⑪ In effect, the inquiry should have been whether the government had undertaken a course of conduct on its own land which, in simple fairness to its neighbors, required it to obtain more land so that the substantial burdens of the activity would fall upon public land, rather than upon that of involuntary contributors who happen to lie in' the path of progress.
As noted above, this court has expressed a policy against allowing compensation in several situations where there was no actual physical injury to the real property. The cases used terms such as “consequential damages”,⑫ or “damages which do not amount to a Taking’ ”,⑬ or “damnum absque injuria.”⑭ Such expressions describe conclusions that the court reached when it had decided that the facts involved did not measure up to the standard necessary for a “taking”. Such injuries were then held to be noncompensable as a matter of law, under the policy against allowing compensation for mere “damages”. Such decisions, which were no doubt right in cases of single-instance wrongs, prove too much when applied to continuing and substantial interference with the use and enjoyment of property. Ordinarily, in a case of a continuing inter[195]*195ference, whether it is substantial enough to constitute a taking will be for the jury to determine.
Another assignment of error in the case at bar challenges the failure of the court to give a requested instruction with respect to low-level flights directly over plaintiffs’ land.⑮ The court instead instructed the jury that only such flights as were conducted over the land at altitudes of less than 500 feet could constitute a taking.⑯
The challenged instruction requires us to decide when, if ever, an airport can be liable for taking property because it permits flights to and from it over private land, but within “navigable airspace”. On this point, there is no doubt that a taking of private property can occur even though the flights are within navigable airspace as defined by law if the flights are below 500 feet. Matson v. United States, 171 F Supp 283 (Ct Cl 1959), held that the plaintiff should recover for a taking, even though the court recognized that the taking was accomplished in what [196]*196today would be navigable airspace.⑰ Griggs v. Allegheny Govmty, supra, is a square holding that taking of private property can be accomplished by planes taking off and landing within navigable airspace. 369 US 84, 82 S Ct 531, 533, 7 L Ed2d 585, 588. There is, therefore, no merit in the defense argument that all flights within the navigable airspace are automatically free from liability.⑱ The debate centers on the legal effect of the 500-foot rule.
The Port’s argument that flights above 500 feet are immune from private litigation seems to be based on two grounds:
(1) As a result of the legislation by Congress in denominating navigable airspace and declaring a public right of transit through it, the landowner cannot claim there has been a “trespass” through a column of air which he does not own.⑲ Ownership of the navigable airspace is said to be in the public.⑳
[197]*197(2) As a result of the same legislation, the landowner is in a position analogous to that of a person abutting a highway or a railroad right-of-way who must be content with the incidental inconveniences that are unavoidably attendant upon those operations.㉑
The instruction given below forces a choice between consistency, which is on the side of the plaintiffs, and public convenience, which is on the 'side of the Port. Logically, it makes no difference to a plaintiff disturbed in the use of his property whether the disturbing flights pass 501 feet or 499 feet above his land. If he is in fact ousted from the legitimate enjoyment of his land, it is to him an academic matter that the planes which have ousted him did not fly below 500 feet.㉒ The rule adopted by the majority of the state [198]*198and federal courts is, then, an arbitrary one. The barring of actions when the flights are above 500 feet is also difficult to reconcile with the theory that recovery should be based upon nuisance concepts rather than upon the trespass theory which we have rejected. Whether a plaintiff is entitled to recover should depend upon the fact of a talking, and not upon an arbitrary rule. The ultimate question is whether there was a sufficient interference with the landowner’s use and enjoyment to be a taking.
It is sterile formality to say that the government takes an easement in private property when it repeatedly sends aircraft directly over the land at altitudes so low as to render the land unusable by its owner, but does not take an easement when it sends aircraft a few feet to the right or left of the perpendicular boundaries (thereby rendering the same land equally unusable). The line on the ground which marks the landowner’s right to deflect surface invaders has no particular relevance when the invasion is a noise nuisance. Neither is a 500-foot ceiling relevant, desirable though it may be as an administrative device. If the interest to be protected is worth protecting at all, it is necessary to employ a system of rules that will meet the problem. Whatever virtue the establishment of a 500-foot floor under the cruising flight of aircraft may have as a matter of public safety, there can be only one sound reason to make it a rule of the law of real property. That reason ought to be the knowledge, derived from factual data, that flights above 500 feet do not disturb the ordinary, reasonable landowner. This may be true. We do not know that it is. It may well be that only the most sensitive are offended by such flights. It may equally be true that some of the aircraft now in use are so disturbing to those on the ground that 500 feet [199]*199of air will not provide protection to the landowner below. We are not justified in adopting the 500-foot rule as a rule of property law in cases of this character merely because to do so might make our work easier. The trier of fact in each case is best able to work out the solution. The difficulty was foreseen in the Causby ease.㉓ Congress may very properly declare certain airspace to be in the public domain for navigational purposes, but it does not necessarily follow that rights of navigation may be exercised unreasonably. The power to invade the rights of servient landowners no doubt reposes in the federal government, but there is a point beyond which such power may not be exercised without compensation. United States v. Causby, supra. The same limitation applies to lesser governmental agencies.㉔ See Griggs v. Allegheny County, supra.
Unfortunately for trial judges trying to formulate instructions for juries, the cases have not dealt with the instructions to be given to the laymen who must [200]*200work out the answer under Oregon law. In submitting to a jury a case such as we have before us, the trial court is confronted with the need to verbalize rules as abstract as any to be found in the law, but, as we have said before,㉕ the ingenuity of trial judges in formulating meaningful instructions to juries is usually equal to the task.
The idea that must be expressed to the jury is that before the plaintiff may recover for a taking of his property he must show by the necessary proof that the activities of the government are unreasonably interfering with his use of his property, and in so substantial a way as to deprive him of the practical enjoyment of his land. This loss must then be translated factually by the jury into a reduction in the market value of the land.
We cannot say, as a matter of law, that jet or rocket or some other kind of noise within 500 feet, or within some other number of feet, of private land might not in a particular case cause a taking for public use. The question in each case must be decided by an appropriate tribunal. Our present constitution places this duty upon the jury. If the jury proves unequal to the task, that, as noted above, is a legislative problem. If the case should arise when it is claimed that insufficient evidence was placed before the jury to support a verdict, then will be time enough to pass upon the amount of evidence necessary to get to the jury. In the ease at bar, much of the evidence was excluded. As we have noted, this exclusion was error.
Other assignments of error challenge various rulings which were made in a logical and consistent [201]*201pattern which followed from the able trial court’s view of the case as one controlled essentially by trespass concepts. On another trial, these rulings are not likely to be repeated, and need not detain us further now.
Reversed and remanded.
Inverse condemnation is the popular description of a cause of action against a governmental defendant to recover the value of property which has been taken in fact by the governmental defendant, even though no formal exercise of the power of eminent domain has been attempted by the taking agency. See, e.g., State Highway Com. v. Stumbo et al, 222 Or 62, 66, 352 P2d 478, 480 (1960); Tomasek v. State Highway Com’n, 196 Or 120, 248 P2d 703 (1952).