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#1
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Pawnee 150HP engine upgrade
Has anyone seen a 150hp Pawnee (PA-25) get upgraded with a bigger
engine? Our soaring club has the opportunity of acquiring a 150hp Pawnee (donated by a member) but we would only do so if it were possible to upgrade the engine so it could be used as a towplane. I did a cursory search on the FAA website and could find no STCs to install a larger engine. With only 150hp, the Pawnee apparently is a very anemic towplane. |
#2
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Pawnee 150HP engine upgrade
On Sep 14, 6:46*pm, 150flivver wrote:
Has anyone seen a 150hp Pawnee (PA-25) get upgraded with a bigger engine? *Our soaring club has the opportunity of acquiring a 150hp Pawnee (donated by a member) but we would only do so if it were possible to upgrade the engine so it could be used as a towplane. *I did a cursory search on the FAA website and could find no STCs to install a larger engine. *With only 150hp, the Pawnee apparently is a very anemic towplane. There is a PA-25-180 in South Carolina that was owned bt Jeff Cloud. Not sure who got it after he died. There was one at the Houston club in Waller TX when I visited there last year. Our club in SE new York uses the same combination. We think it works well for us. The question will be whether you can get anyone these days to sign off on a field approval which is how these ships were converted. If you are serious, I have copies of the associated 337's for Jeff's airplane and ours. Good Luck UH |
#3
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Pawnee 150HP engine upgrade
On Sep 14, 7:01*pm, wrote:
On Sep 14, 6:46*pm, 150flivver wrote: Has anyone seen a 150hp Pawnee (PA-25) get upgraded with a bigger engine? *Our soaring club has the opportunity of acquiring a 150hp Pawnee (donated by a member) but we would only do so if it were possible to upgrade the engine so it could be used as a towplane. *I did a cursory search on the FAA website and could find no STCs to install a larger engine. *With only 150hp, the Pawnee apparently is a very anemic towplane. There is a PA-25-180 in South Carolina that was owned bt Jeff Cloud. Not sure who got it after he died. There was one at the Houston club in Waller TX when I visited there last year. Our club in SE new York uses the same combination. We think it works well for us. The question will be whether you can get anyone these days to sign off on a field approval which is how these ships were converted. If you are serious, I have copies of the associated 337's for Jeff's airplane and ours. Good Luck UH I have the pawnee that UH was refereing to. PA-25-180. It is for sale. Call me if you are interested. Thanks, 803-374-7400 |
#4
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Pawnee 150HP engine upgrade
With only 150hp, the Pawnee apparently is a
very anemic towplane. Is 150 hsp enough? It was my understanding that the Jeff Cloud Pawnee did a pretty good job. Perhaps not so well with "wet" Open Class machines but he was seen at many sites in the SE doing a good job. Bob |
#5
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Pawnee 150HP engine upgrade
On Sep 18, 2:45*pm, Robert Gaines
wrote: * With only 150hp, the Pawnee apparently is avery anemic towplane. Is 150 hsp enough? *It was my understanding that the Jeff Cloud Pawnee did a pretty good job. Perhaps not so well with *"wet" Open Class machines but he was seen at many sites in the SE doing a good job. *Bob I've reviewed the logbooks of the Pawnee-150 in question. Apparently back in 1966 the owner at the time hung a 230hp O-470 engine on it in place of the O-320. The 337 filed with the FAA just says they replaced the engine, modified the cowling, moved the battery, weighed and flight tested it at a new and higher gross weight, all in accordance with CAR 8. Somehow I don't think this 337 would get passed today. A later owner didn't even bother to file a 337 to remove the O-470 and stick an O-320 back onto it. There was just a logbook entry saying the bigger engine was replaced with a 0 SMOH O-320 around 1992. At the last annual an A&P IA finally insisted that a proper 337 be submitted legalizing the reconversion back to the original configuration. It doesn't look feasible to me that we could get a field approval to hang a 230hp or larger engine on a PA-25-150 nowadays. Does anyone disagree? |
#6
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Pawnee 150HP engine upgrade
On Sep 19, 5:26*pm, 150flivver wrote:
I've reviewed the logbooks of the Pawnee-150 in question. *Apparently back in 1966 the owner at the time hung a 230hp O-470 engine on it in place of the O-320. *The 337 filed with the FAA just says they replaced the engine, modified the cowling, moved the battery, weighed and flight tested it at a new and higher gross weight, all in accordance with CAR 8. * Have you considered returning the airplane to the 1966 configuration which appears to be the last time it was legal? Why would a field approval or 337 be required to restore the airctraft to it's last properly documented and FAA approved configuration? Andy |
#7
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Pawnee 150HP engine upgrade
On Sep 21, 9:06*am, Andy wrote:
On Sep 19, 5:26*pm, 150flivver wrote: I've reviewed the logbooks of the Pawnee-150 in question. *Apparently back in 1966 the owner at the time hung a 230hp O-470 engine on it in place of the O-320. *The 337 filed with the FAA just says they replaced the engine, modified the cowling, moved the battery, weighed and flight tested it at a new and higher gross weight, all in accordance with CAR 8. * Have you considered returning the airplane to the 1966 configuration which appears to be the last time it was legal? *Why would a field approval or 337 be required to restore the airctraft to it's last properly documented and FAA approved configuration? Andy I mentioned to the owner that if the last 337 hadn't been filed documenting the current condition of the aircraft (ie. legitimizing the O-320 replacing the O-470), then it would be possible to find an O-470 and the necessary parts to install it and have it comply with the 1966 conversion paperwork. He's going to order the CD from the FAA and see exactly what the FAA has in its records as to the current status of the aircraft. |
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