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Old 10-25-2010 | 12:15 PM
  #15  
MTK
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From: Whippany, NJ
Default RE: Gas engines on Pattern: DLE?


ORIGINAL: speedracerntrixie

NJRCFLYER2 The cowl on the airplane I am building is large enough that the engine will be mounted at an angle that will allow a strait header and cannister set up to run down the fuse between the radio plate and the landing gear plate. I have found the header/cannister setup on Ebay and looks to be a KS knockoff. For 60.00 I feel I would give it a shot. If it dosen't work then I stil have enough room to install an ES pipe.

Matt, I did take a look at the SAP180. I read through the thread here and pretty much came to the conclusion that it wasn't really what I was looking for. It appears that the stroke/bore and timing lend the engine to more of a high RPM operation then I am interested in. The airplane I am building is pretty much a 33% Laser with downsized wings and tail. The cowl is fairly large for a 2x2m pattern ship. As a result I feel that I really need an engine that will swing a 19-20'' prop in the 8500 RPM range. The other thing that I was not too keen on is the choke setup on the SAP. Not really a big deal but it would mean having the choke activation rod either come out the top or bottom of the cowl. On the DL I would be able to come out the front the same as I have done with the DA 50.

I do value opinions so by all means if my information is lacking I would like to hear from those with more experience than myself.
Just a thought on the DLE versus SAP. These engines have identical bore-stroke ratios, at 36x30mm. Both are designed to rev, but haul smaller props than one would want in a pattern plane.

Both will swing 19-20 props, just not much pitch. I tried 19x8 and 19x10 MDK Eng Hybrid props and both of these were turned well by SAP180. Both were noisy by pattern standard.

If you want to turn 19x12 or 20x12, the ZDZ40cc is really the only option available today. Hopefully with the YDAero coming to market in the next couple months, it may be another option worth consideration.

Good luck. I am pleased to see an IMAC'er trying this game out with the smaller gassies available today.