stunthanger.com
Engine basics => Engine set up tips => Topic started by: Paul Taylor on December 22, 2010, 08:17:50 PM
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Well good enough for a profile plane?
All it has on the case is OS Max.
I think it may be a 25, but nothing is stamped on the case.
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No Paul, you wouldn't like it!! Send a PM for the ship to address!! LL~ Merry Christmas, Ray
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Hi Paul,
It sure looks like the .25FSR I have. I think you could use it if you put on a 10-4 and let it run in a wet 2. The one i have can put out more "power" than a Fox .35. But it's a different kind of power. ;D I put it on an old slow combat plane and ran it kinda hard, but not peaked, with a 10-4. It was quick.......
Merry Christmas!
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Paul, the problem with this sort of engine is that it likely weighs as much as an LA46 and will not swing that 11-12" prop which is so satisfying for producing gobs of torque. This translates into raw pulling power through the maneuvers, especially in corners where the barn door is throw open, creating a lot of drag. The big props pull the plane through the maneuvers so well. Engines like the LA46 can be had for way less than a "C-note", so in my book are a bargain.
Pat Johnston
Love them 46's
Skunk Works
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Well good enough for a profile plane?
All it has on the case is OS Max.
I think it may be a 25, but nothing is stamped on the case.
I think that's a 25FSR, or the later 25F. I don't have any particular information since I am not aware of anyone using it for stunt. But I would expect that you can get pretty good performance if you set it up right. I would start with about a 260 venturi with an OS needle, and a 10-4 APC. The same basic idea I suggested for the ST G34 is how I would proceed.
Most of these so-called "R/C" motors can be excellent stunt engines as long as you run them at relatively high RPM as they were designed.
Brett
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OK, Thanks guys!
I will try and find parts for this puppy and put it to work and report back. (When the weather warms up a tad)
Stay tuned.....
Sorry Ray. :-[
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Paul, i think Brett is right on about this engine. I run two of them, one on a combat ship,bladder and 8x5 prop and one on a home made stunt job a little larger than a ringmaster. People are always suprised at how well it pulls that stunt plane as it weighs around 36 oz. I run mine with the r/c carb wired open,10x4 apc, stock muffler and a Hayes 3 oz. tank on pressure. I think you will like it!!
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Paul, i think Brett is right on about this engine. I run two of them, one on a combat ship,bladder and 8x5 prop and one on a home made stunt job a little larger than a ringmaster. People are always suprised at how well it pulls that stunt plane as it weighs around 36 oz. I run mine with the r/c carb wired open,10x4 apc, stock muffler and a Hayes 3 oz. tank on pressure. I think you will like it!!
I would expect it to be at least as strong as a 25FP and that has no problem up to about 40 oz. But, as I mentioned, I haven't actually tried it.
Brett
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Hi Paul,
If you still have a Evo 36 check the venturie to see if she'll fit. I'm using the evo 36 venturie in the OS 40 FSR and it fits like a glove. Ya just have to make a few changes to the venturie. The Evo 36 tongue muffler fits also but I'm trying to use mine on pipe. The reason I say give it a try is cause I believe the OS 40 FP and the OS 25 FP uses the same venturie. I'm always doing something stupid like this but its fun. Gary
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Gary - I don't own a Evo engine. I may rob Peter to pay Paul or do a WTB in the ad section for part.
Right now if I could find a remote spray bar that is not being used, I can get this thing running in short order.
Might lose the spinner to try and save weight.
I did find a 25 stamp on the case.
It will be going on a SkyRay35.
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Gary - I don't own a Evo engine. I may rob Peter to pay Paul or do a WTB in the ad section for part.
Right now if I could find a remote spray bar that is not being used, I can get this thing running in short order.
Might lose the spinner to try and save weight.
I did find a 25 stamp on the case.
It will be going on a SkyRay35.
Hi Paul,
The plane I mounted mine on is about the size of a Sky Ray, maybe a touch bigger. Very light, though, and it has a stretched VooDoo wing..
5% nitro, APC 10-4, and a decent 2 cycle setting. 60' eye to eye .015s and 3.9 to 4 second lap times........... The 25FSR is hotter than the .25FP. Been there done that..........
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Hi Paul,
. The reason I say give it a try is cause I believe the OS 40 FP and the OS 25 FP uses the same venturie. Gary
Yes, but the 25 FP and 25 SF/FSR don't have the same size venturi hole in the case. The FP is smaller.
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8-6 MAS prop, OS 1-a remote needle valve, Venturi from a nylon spacer. Yellow jacket bladder tubing..... about 75mph...... 370-400sq inch foamie. No not stunt but tons o' fun.
Dave