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Super Tigre .90 Flying Weight..

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Old 08-30-2012, 04:11 PM
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Corvette50
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Default Super Tigre .90 Flying Weight..

I have a Great Planes Cap 580 Embry Riddle, and installed this engine on it.She came in at 7.4lbs, and was wondering if this engine would be enough for 3D flying.

I'm interested in vertical performance.

Thank you in advance.
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Old 08-30-2012, 06:23 PM
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Default RE: Super Tigre .90 Flying Weight..

Depends on what you expect with 3d flying. To me this plane is too heavy for the g90 to fly the typical 3D I am used to seeing. But with the right prop it could do some limited 3D, and would have pretty good vertical.

Ed
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Old 08-30-2012, 09:19 PM
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Ernie Misner
 
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Default RE: Super Tigre .90 Flying Weight..

On my g90 a mac's header and mousse can muffler cut weight and really made it come alive.

Ernie Misner
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Old 09-01-2012, 05:31 PM
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Default RE: Super Tigre .90 Flying Weight..

You'll probably be alright. Mine likes an apc 15x4W.
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Old 09-01-2012, 09:29 PM
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Default RE: Super Tigre .90 Flying Weight..

Can you give us some tach readings with that engine and prop ? Iwould guess it should be very good.
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Old 09-02-2012, 12:06 PM
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Default RE: Super Tigre .90 Flying Weight..

I can't as my tach got destroyed by the lawnmower.[:@] Had the engine on my Mojo which weighed 6.75 or so wet and it had unlimited vertical. This was running 0% fuel also. Put a Saito 100 on it and and with the same prop, vertical is about the same. The Saito has instant throttle response when running 33%, (not the best with 0%). Way better for 3D work. A Xoar 15x6 is recommended for the 100, and might work good on the .90. Spool up would probaly be better also being as it's lighter.
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Old 09-04-2012, 05:49 AM
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Default RE: Super Tigre .90 Flying Weight..

Do not use a 15" propeller on your SuperTigre 90-size engine. A 13 x 8 would be a good prop, or maybe a 14 x 6 or 7. You want the engine to turn up near 12,000 RPM when you have it leaned to just rich of peak RPM on the ground. A 15" propeller will be too much load, and will never allow the engine to run well. Throttle handling will go out the window with that large a propeller, plus you won't have good power.
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Old 10-06-2012, 12:27 PM
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Default RE: Super Tigre .90 Flying Weight..

Tried a 14x4W and the .90 didn't seem to like it. I'll try a 14x6 regular blade when I put it in another plane.
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Old 10-07-2012, 05:56 AM
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Default RE: Super Tigre .90 Flying Weight..


Quote:
ORIGINAL: c550th

I have a Great Planes Cap 580 Embry Riddle, and installed this engine on it.She came in at 7.4lbs, and was wondering if this engine would be enough for 3D flying.

I'm interested in vertical performance.

Thank you in advance.
Not enough engine to handle 7.4lbs. for 3D.

A good prop for it is an APC 14 x 4 W at least that is what I used to run on mine.
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Old 10-08-2012, 10:17 AM
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Default RE: Super Tigre .90 Flying Weight..

My ST 90 on a mac's header anc mousse can really did come alive. That std. muffler really sucks.
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Old 10-08-2012, 03:20 PM
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Default RE: Super Tigre .90 Flying Weight..

Ernie's correct!

The S.T. 90 really wakes up with a tuned can. Not sure if it will 3D your plane like you want, but you will like the engine alot more.
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Old 10-08-2012, 04:01 PM
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Default RE: Super Tigre .90 Flying Weight..

The can cured the "ST rich midrange" too.

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Old 10-09-2012, 12:52 AM
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Default RE: Super Tigre .90 Flying Weight..


Quote:
ORIGINAL: Ernie Misner

The can cured the ''ST rich midrange'' too.

The ST midrange problems can be cured with the stock mufflers too. It takes about 2 gallons or more to have enough run-time on it to be able to run the spraybar straight in. Until then, the spraybar ends up needing to be about 45° off from straight in to get a good transition. Mine transitioned great in that position until about 2 gallons where it started getting lean in the midrange. Putting the spraybar back to factory position, and Presto! A perfectly smooth instant transition after a 60 second idle. Pretty nice.

Although a bigger carb and a bigger muffler does yield more power, they aren't needed to get a SuperTigre to transition well.
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