IO-370 for AOPA Sweepstakes 170B
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- Bruce Fenstermacher
- Posts: 10410
- Joined: Tue Apr 23, 2002 11:24 am
IO-370 for AOPA Sweepstakes 170B
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
- GAHorn
- Posts: 21260
- Joined: Fri Apr 12, 2002 8:45 pm
Re: IO-370 for AOPA Sweepstakes 170B
I have sent an email to Kollin Stagnito at AOPA suggesting that the removed items from the modifications be donated to TIC170A.
see: viewtopic.php?f=27&t=16155
see: viewtopic.php?f=27&t=16155
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.

- falco
- Posts: 217
- Joined: Tue May 25, 2010 5:44 pm
Re: IO-370 for AOPA Sweepstakes 170B
Next question... which propeller?
- dstates
- Posts: 504
- Joined: Sun Jun 30, 2019 5:50 pm
Re: IO-370 for AOPA Sweepstakes 170B
That was in the article:falco wrote:Next question... which propeller?
"Hartzell will contribute an 83-inch Trailblazer constant-speed propeller to the sweepstakes project, and Stoots Aviation is providing the STC required to install both on the Cessna 170B."
N1235D - 1951 170A - SN: 20118
- GAHorn
- Posts: 21260
- Joined: Fri Apr 12, 2002 8:45 pm
Re: IO-370 for AOPA Sweepstakes 170B
A constant speed (or electrically-controlled) propeller on a C-145 / O-300 would make the airplane “jump” also…. but these engines are not currently in-production so do not attract the necessary R&R. (Our engines, using fixed-pitch props, only produce about 118 hp at takeoff if the Type Certificate specs are met…..not the 145 most people are led to believe.)
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.

- IA DPE
- Posts: 213
- Joined: Fri Nov 10, 2017 1:46 am
Re: IO-370 for AOPA Sweepstakes 170B
I wonder if that engine will fit in the factory cowling without blisters.
1955 C170B N2993D s/n 26936
1986 DG-400 N9966C
1986 DG-400 N9966C
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- Posts: 1421
- Joined: Mon Apr 21, 2008 3:06 am
Re: IO-370 for AOPA Sweepstakes 170B
Going by the dimensions of that engine i think the blisters will be required . But it will also depend on the engine frame that is part of the STC. I had to shorten my cowls by 1.5 ins for the engine to fit . But adding the blisters was no big deal.
- DaveF
- Posts: 1555
- Joined: Sat Nov 03, 2007 1:44 am
Re: IO-370 for AOPA Sweepstakes 170B
The guy doing the engine swap says the airplane is really nice as-is, and “I wouldn’t change it.”
https://m.youtube.com/watch?v=LicsjGNw1z8
https://m.youtube.com/watch?v=LicsjGNw1z8
- IP076
- Posts: 89
- Joined: Wed Aug 21, 2019 7:37 pm
Re: IO-370 for AOPA Sweepstakes 170B
Blisters are required.
The engine is essentially a Lycoming clone.
My 370 and the parts kit arrive next week!
The engine is essentially a Lycoming clone.
My 370 and the parts kit arrive next week!
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- Posts: 1421
- Joined: Mon Apr 21, 2008 3:06 am
Re: IO-370 for AOPA Sweepstakes 170B
IPO76 please keep us updated on your progress and your Trials and Tribulations . And heaps of photos .
Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.