Topic Author
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

Lycoming R-680

Mon Jul 01, 2002 9:16 pm

Hey guys, in another topic I mentioned that I had found the FAA database for TCDS's on the web and it listed if the certificate was held in the public domain.

Well I was looking at the certificates and was pleasantly surprised to find out that the Stinson SM8A certificate is now a public document.

That aircraft was powered by a Lycoming R680 rated at 215 horsepower. Anybody have any idea as to how common are these engines out on the used market? And if they are rare, anybody have a recommendation for an acceptable modern substitute that may have the potental to be used in it's place?
Posts: 79
Joined: Fri Jun 22, 2001 5:52 am

RE: Lycoming R-680

Tue Jul 02, 2002 2:42 am


I believe that the R680 was used in some variants of the stearman pt-13/pt-17/NS-2 trainers. If this is correct there should be plenty of cores and spares around take a look in the engine section of trade-a-plane. Also, if you are interested the air and space museum had the original blueprints for the sm8 at one time. Contact the Garber restoration facility in Silver Hill, MD for more information.
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Joined: Sat Jan 27, 2001 6:53 am

RE: Lycoming R-680

Tue Jul 02, 2002 3:32 am

Yes,the R-680 was used in the PT-13 variant of the venerable Stearman,albeit at a 220 HP rating (the R-680-7) or 280 HP (R-680-11).The PT-17 was powered by the 225 HP Continental R-670-5.
"Luck and superstition wins all the time"!
Topic Author
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: Lycoming R-680

Tue Jul 02, 2002 11:30 am


I was hoping for that when I saw that the TC was in the public domain DNL 65.
I hope that they still do.

If they do my plan will become more complete.

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