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

Sig Kougar

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Old 10-19-2015, 01:41 PM
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Default Sig Kougar

Has anyone matched the sig Kougar with an Evolution .60NX and the optional tuned muffler. I know the Kougar is not a great airplane for speed and I don't have the need to go ballistic. I just want an everyday sport flier that's reasonably quick. Projected speed? I'm thinking maybe 90 mph + or minus?? thoughts?
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Old 10-19-2015, 04:12 PM
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I have a Kougar with a Rossi 40 coupled with the Evo version of the Jett muffler and have recorded 110 MPH on a GPS device along for the ride. The Rossi is a brute for a 40.
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Old 10-20-2015, 04:28 PM
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It's a strong one. On a 10-7 APC hauls a Phoenix 7 ARF with authority, lots of vertical. Top speed likely in the 90+ bracket, not clocked.

Now on a Screamin Demon with a 9-10 - boogies along.
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Old 10-22-2015, 06:03 PM
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you will be in the 110-115 mph with that engine with 10x6 prop. the 9x8 might give you more but I think it will be less. a 55AX stock with jett pipe will get you 115 o a 11x7 prop
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Old 10-23-2015, 04:31 PM
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Nothing wrong with ballistic. You can go there if you wish or not.
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Old 10-24-2015, 05:20 AM
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True. 'Ballistic' is subjective to the flier. 90 mph is ballistic to some , but dirt slow to others. I had a Phoenix Strega a couple of years ago with the Jett .50 . This was a great combination and had the kind of speed I like. I never did find out how fast it was going, but I am kind of hoping the Kougar with the Evo '60nx would be similar or a tad quicker.
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Old 10-24-2015, 09:50 PM
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the couger will be a bit faster
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Old 10-25-2015, 01:00 PM
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The thought just occurred to me; I have a thunder tiger Pro .46. Suitable propped, how fast do you think it would go in a little Sig Kobra?
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Old 10-25-2015, 04:45 PM
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Easy 100 MPH or more but, 120 would be quite a feat with any of the Kobra/Kougar air frames no matter how much power you throw at it.
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Old 10-29-2015, 05:42 AM
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Big fat thick wings hold you back. Thin the wing on the Kobra and put the .60NX in it and hold on. The TT Pro .46 on an APC 10-7 would be a strong power package but with stock wings the drag brakes are always partly "on". Same motor/prop apparently good for 130-ish on a Q500 airframe.
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Old 11-06-2015, 02:20 PM
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Originally Posted by MJD View Post
Same motor/prop apparently good for 130-ish on a Q500 airframe.
That's all you need right there.
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Old 11-07-2015, 11:27 AM
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Originally Posted by JT Hammer View Post
Has anyone matched the sig Kougar with an Evolution .60NX and the optional tuned muffler. I know the Kougar is not a great airplane for speed and I don't have the need to go ballistic. I just want an everyday sport flier that's reasonably quick. Projected speed? I'm thinking maybe 90 mph + or minus?? thoughts?
Same idea in the back of my mind for several years as I have similar components and was thinking along the same lines. GarySS has some nice ideas incorporated into a Kobra from this thread that I think would transit well to a Kougar. I'd also like to thin airfoil down as MJD suggested - have to build up wing, mod existing cores, or cut new ones...

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Old 11-07-2015, 03:22 PM
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Originally Posted by H5606 View Post
Same idea in the back of my mind for several years as I have similar components and was thinking along the same lines. GarySS has some nice ideas incorporated into a Kobra from this thread that I think would transit well to a Kougar. I'd also like to thin airfoil down as MJD suggested - have to build up wing, mod existing cores, or cut new ones...
One of my many doodling projects is a speedy version of the Kobra. It is only roughed out in CAD at the moment, it'll be time to dive into it sometime down the road.
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Old 11-08-2015, 09:15 AM
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Originally Posted by MJD View Post
One of my many doodling projects is a speedy version of the Kobra. It is only roughed out in CAD at the moment, it'll be time to dive into it sometime down the road.
Originally Posted by dhal22 View Post
That's all you need right there.
Speaking of Q-500 and doodling, here's a sketch I drew up some yrs back to try and "beautify" the rather stark and generic looking box airframes associated w/ Quickies. Wanting to stay simple and was thinking of deepening aft fuse, adding boxy jet fwd style canopy and turtle deck. incr rudder area to extend below horizontal stab, tail wheel, fake belly scoop, wheel pants, cowl, and spinner. Now, I think I'd thin the airfoil too.

Would be interested in seeing other's doodling projects...
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Old 11-08-2015, 03:44 PM
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Originally Posted by H5606 View Post
Speaking of Q-500 and doodling, here's a sketch I drew up some yrs back to try and "beautify" the rather stark and generic looking box airframes associated w/ Quickies. Wanting to stay simple and was thinking of deepening aft fuse, adding boxy jet fwd style canopy and turtle deck. incr rudder area to extend below horizontal stab, tail wheel, fake belly scoop, wheel pants, cowl, and spinner. Now, I think I'd thin the airfoil too.

Would be interested in seeing other's doodling projects...
Love it, massaging Q500's has been the subject of many casual sketches.
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