Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Engine for GP Shoestring

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Old 09-11-2004, 07:24 PM
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drdavis
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Default Engine for GP Shoestring

I would like to get the most speed out of the Shoestring without adding a ton of weight to the nose. What do you guys think about an OS 91 DF engine? Or would a Jett 91 be better?
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Old 09-11-2004, 09:14 PM
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Cyclic Hardover
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Default RE: Engine for GP Shoestring

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Old 09-13-2004, 08:53 AM
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bob27s
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Default RE: Engine for GP Shoestring

Either the Jett 90L or OS 91FX with a tuned muffler installed will get you pleanty of speed. Both are light weight, and mount identically.

The plane is a bit draggy, but flys great. It seems to like a 12" prop, although the last one I flew we installed an 11x7.5 on... and it was pretty quick (no radar numbers, sorry) . It does not perform like a QM or F-1 ship, but can be made to move with the correct prop selection.

I'm not sure about the DF engine......they tend to need to turn much smaller props at much higher RPM. Plus, it might be hard to mount the full length pipe.
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Old 09-14-2004, 10:56 PM
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PLANE JIM
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Default RE: Engine for GP Shoestring

I own two of them-the first has a ST 61 turning a 11X7.5 prop it is pretty quick-but the 2nd blisters with a 91 fx and I believe it is a 13X6 prop-sorry no radar speeds but it will out run the two little toni's that we have played with
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