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

EU-1A Engine Choice

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Old 03-06-2003, 06:36 AM
  #1  
KC-Lovespeed
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Default EU-1A Engine Choice

Started my EU-1A pattern plane (80's jet looking pattern plane). Plans call for a rear exhaust .61 with pipe to a .91 2 cycle. Really didn't want to go the rear exhaust motor way due to there a specialized motor. Was leanen towards a OS 91 2 cycle with macs mini pipe. Also have a Satio 100 I could use. I could go the Jett 60 also. Plane is fiberglass fuse, probably hit the 10 pound range. Looken for lots of speed !
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Old 03-06-2003, 07:58 AM
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Flyboy Dave
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Default KC-Lovespeed....

....none of your three choices are gonna give you what
your lookin' for...IMO....correct answer is....

O.S. 1.08 FSR....trust me....
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Old 03-08-2003, 08:03 PM
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Currently have 2 EU-1As and have seen several others fly - all with the OS61V rear exhaust pattern engine and tuned pipe buried in the fuse top as shown in the instruction book. With this engine/pipe, performance and speed are typical of pattern planes of that era - 110MPH+ with large, graceful lines. Its not a speed plane. The plane was designed specifically around the 61 size engine because that was the largest displacement permitted in pattern competition at that time. The rear exhaust versions of these engines generated the optimal horsepower/RPM for pattern use. I use the OS 61V front intake/rear exhaust (FIRE) with MACs Products #3681, 15 degree straight header and 1060 or 1260 pipe. The Rossi 61 FIRE will also fit and has temendous power and the YS 60 FIRE is probably the strongest of the 3 mentioned. The OS and YS are no longer in production - not sure about the Rossi - BUT they're still around. Try a "wanted" posting. It worked for me. I believe Jett Engineering makes a FIRE 61 that may work - check dimensions first - the EU-1A nose is real tight.

Larger engines may work but the airplane is so clean aerodynamically with the recommended engine set-up and retracts that I would suspect that the power offered by a larger 2 stroke (and presumably side exhaust) engine will induce enough drag and add sufficient weight to reduce the gain in performance. Its definitely not a 4-stroke design. At the very least, ground clearance would be problem with the larger props.

Get yourself the the 61 with pipe, build it as light as possible and you'll be satisfied. Call me if you have questions 610-436-5552. Good luck.
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Old 03-08-2003, 08:56 PM
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Default EU-1A Engine Choice

Thanks for the post. Lots of good info there. I will be looken at the Jett to see if it will fit, love my Jett 50.
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Old 03-06-2004, 05:50 PM
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Default RE: EU-1A Engine Choice

how about an O.S. 140RX
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Old 03-08-2004, 10:05 AM
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Default RE: EU-1A Engine Choice

The EU-1A nose is extremely tight when using a 61 rear exhaust - I believe the OS 140 would be out of the question especially considering the height of the exhaust port relative to the crankshaft centerline - would position the tuned pipe well above the fuse tunnel. Unfortunately, the plane was designed exclusively around the 61 rear exhaust engines. I believe Rossi still manufactures the 61 rear exhaust and is a real powerhouse - don't use more than 5% nitro - too much compression.
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Old 03-08-2004, 03:39 PM
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Default RE: EU-1A Engine Choice

Back when I flew pattern, I always wanted one Cool looking ship.
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Old 03-08-2004, 08:49 PM
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vinnyjet
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Default RE: EU-1A Engine Choice

have 2 eu1a one with a ys 61 fast
one with rossi 65 rocket ship
need to power back downwind
vinny
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Old 03-08-2004, 09:31 PM
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Deadstik
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Default RE: EU-1A Engine Choice

Vinny,

I've seen yours and they are beautiful planes.. DOES ANYBODY HAVE A KIT THEY WILL SELL ????????? If so, PLEASE give me a call/email/PM/smoke signals... whatever. Am very interested...

Thanks,

Deadstik......[8D]
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Old 03-09-2004, 10:18 PM
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vinnyjet
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Default RE: EU-1A Engine Choice

deadstick
thanks i had a third one lost it three years ago
signal wire on aileron servo shorted out and rolled
over right after take off. that one had a ys 60 re
that plane was very fast also
vinny
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