# Is there a good source for estimating the per unit cost breakdown for a classic GA plane like the Cessna 172?

For instance, on a Cessna 172 what percent is spent on:

• Raw materials
• Labor actually manufacturing the plane
• Testing the completed individual planes
• R&D Making the plane (at this point, very little for the 172 I suspect
• Certification testing
• Insurance
• Avionics
• Anything I forgot...
• Companies in all industries usually keep detailed cost information private so I think there's very little chance of getting a definite answer to this. But someone somewhere could have come up with a 'guesstimate' of course. It might be easier to get cost details for experimental - i.e. non-certified, homebuilt - aircraft but I'm not sure if that would be a useful enough answer? – Pondlife Jun 28 '15 at 15:57
• If I say no there isn't, how do I prove it? You could always say "there must be one somewhere". – CGCampbell Jun 28 '15 at 18:37
• In light of this, I changed it to estimating in the title. – David Jun 28 '15 at 19:52
• It's also worth noting that the used market for small planes is massive, far larger in fact than the market for new aircraft. A 2015 172 costs about \$370k; you can buy a 1970 airframe with practically the same engine and airframe specs for \$100k. That may, in fact, be a good place to start; an older airframe, assuming it's still airworthy, is going to be closer in cost to the sum of its parts than a brand new one. The difference is a combination of Cessna's overhead and true depreciation due to age and wear of the frame. – KeithS Jun 29 '15 at 21:04
• @David Rosakm Aircraft Design part. VIII provides statistical methods to breakdown an aircraft cost. You can find it probably at any Aerospace University Libraray. – GHB Feb 29 '16 at 16:08