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Old 11-23-2019, 04:49 PM
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Originally Posted by Captcrunch44
Before and after I ran it there is little to now compression
Valves aren't leaking?
Old 11-23-2019, 07:12 PM
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Originally Posted by Glowgeek
Valves aren't leaking?
good question
I will disassemble and find out
Old 11-23-2019, 08:07 PM
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Valveís are good a while back I tried to put in a Healy coil for the glow plug I was wondering if it wasnít too far gone because it barely cut any threads in to put the Healy coil in. So that is leaking bad I need a new head. To bad the engine is low time.
Old 11-23-2019, 09:20 PM
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Gary, I did a little research and according to Walt Musciano's article he pulled the .60 and put in a .40 because the Navion would pull straight up like a Messerschmitt. The .65 should do great! Walt also mention if he was to build another he would have sheeted the whole wing and not had the open area. I think I will follow his suggestion and sheet the entire wing and fiberglass the surface.
Old 11-23-2019, 09:51 PM
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May want to favor the lighter build?
Old 11-24-2019, 01:12 AM
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I would.

Thank you for the comments on the indian paint job everybody, i never forget i'm lucky i get paid to do it.

Lonnie i lean your way huge on big powerful saito fourstrokes for small aeroplanes you can always throttle them back, and most of the overpowered aeroplanes i've built have not needed any lead in the tail, like okc i'm happy to relieve the bulk head so the carby sits behind it.

Dave has bruce fessed up to his real name/age somewhere and i missed it ? or is he waiting for fedex to deliver the calculator?

ps i hope it's got spell check
Old 11-24-2019, 05:05 AM
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Question
will the head of an 82 fit an old 80?
Old 11-24-2019, 05:47 AM
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Displacement, Bore, Stroke, Weight, Shaft Thread, HP
FA-80
13.1
27.0
22.8
540
M7x1
1.3

FA-82a
13.8
29.0
20.4
462
M7x1
1.5


You would have to swap the 82 piston and ring over as well, and possibly the rod. Hard to say where the compression ratio would end up. Even if the cylinder head mounting hole pattern is the same the 82 cylinder head may not fit in the 80 case.

Could open up a big can of worms,

Last edited by Glowgeek; 11-24-2019 at 05:52 AM.
Old 11-24-2019, 06:06 AM
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Originally Posted by Jesse Open
May want to favor the lighter build?
I plan on being lighter, his design was way overbuilt. The laser cutter and I have made some mods and material substitutions I think will do the trick.
Old 11-24-2019, 06:07 AM
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Originally Posted by Rudolph Hart
I would.

Thank you for the comments on the indian paint job everybody, i never forget i'm lucky i get paid to do it.

Lonnie i lean your way huge on big powerful saito fourstrokes for small aeroplanes you can always throttle them back, and most of the overpowered aeroplanes i've built have not needed any lead in the tail, like okc i'm happy to relieve the bulk head so the carby sits behind it.

Dave has bruce fessed up to his real name/age somewhere and i missed it ? or is he waiting for fedex to deliver the calculator?

ps i hope it's got spell check
He is piecing the stone tablet back together after it was dropped so he can get the date.
Old 11-24-2019, 06:46 AM
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Originally Posted by Glowgeek
Displacement, Bore, Stroke, Weight, Shaft Thread, HP
FA-80
13.1
27.0
22.8
540
M7x1
1.3

FA-82a
13.8
29.0
20.4
462
M7x1
1.5


You would have to swap the 82 piston and ring over as well, and possibly the rod. Hard to say where the compression ratio would end up. Even if the cylinder head mounting hole pattern is the same the 82 cylinder head may not fit in the 80 case.

Could open up a big can of worms,
hmmm
thatís interesting the 82 has a longer stroke then the 80
Old 11-24-2019, 06:58 AM
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Originally Posted by Captcrunch44

hmmm
thatís interesting the 82 has a longer stroke then the 80
Nope, shorter. Saito went more "over square" with the 82, short stroke big bore. It should produce peak power at higher rpms than the longer stroke smaller bore of the 80.
Old 11-24-2019, 07:05 AM
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Originally Posted by Glowgeek
Nope, shorter. Saito went more "over square" with the 82, short stroke big bore. It should produce peak power at higher rpms than the longer stroke smaller bore of the 80.
ok I guess I didnít look at the numbers right
Old 11-24-2019, 07:13 AM
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Bookmark this site for future reference

Specifications
Old 11-24-2019, 07:39 AM
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I love that site!
Old 11-24-2019, 07:56 AM
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Yes, the 80 has good grunt for larger props.
The 82 only makes the horsepower when the RPM range is extended. The 80 also has a stronger case.
Old 11-24-2019, 07:57 AM
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Gary, PM'd you
Old 11-24-2019, 12:35 PM
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Originally Posted by Jesse Open
Yes, the 80 has good grunt for larger props.
The 82 only makes the horsepower when the RPM range is extended. The 80 also has a stronger case.
Is there a case for the 82 being the stronger engine?
Old 11-24-2019, 12:54 PM
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Right now I think there both are good engineís
i am just bummed that I have a head that I donít know how to fix. But I do have some good parts
Old 11-24-2019, 01:04 PM
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Crunchy, thread the helicoil in until it comes out and reinstall it with jbweld. Then run a tap through to clean things up.
Old 11-24-2019, 01:16 PM
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MacGregor's has one in stock, if that is an option. 77 bucks.

https://www.hobbyplastic.co.uk/index.php?main_page=product_info&cPath=88_95_136_1 82_159&products_id=2881&zenid=36pap7qo3rh3famstrki 75c3b4

This is confusing, the header say Saito 80 cylinder left, the caption below the picture says it's for a 72.

Last edited by Hobbsy; 11-24-2019 at 01:21 PM. Reason: Spelling
Old 11-24-2019, 01:32 PM
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Originally Posted by Hobbsy
MacGregor's has one in stock, if that is an option. 77 bucks.

https://www.hobbyplastic.co.uk/index...famstrki75c3b4

This is confusing, the header say Saito 80 cylinder left, the caption below the picture says it's for a 72.
thatís ok I will put the lower end and the valveís is my stick and I am sure some day I will need the parts for something
Old 11-24-2019, 03:39 PM
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At least itís not all bad this weekend
I put together a 91 that I got in a bag. A new crank ,bearings ,and a couple new O-Rings in the carb. Now it runs great in will be sent out to a new expecting father.
Old 11-24-2019, 06:18 PM
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Wasp
pm sent
Old 11-24-2019, 06:57 PM
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Originally Posted by Captcrunch44
Wasp
pm sent
I received and returned thank you...

Jim

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