rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 292 ONLINE 28 EVENTS SEARCH REGISTER  START HERE
 
1 page317 viewsPOST REPLY
Next D . Fast Lad Performance . Ace Hobby

.
.
HIROBO Freya - Sceadu - Shuttle > Evo 90 w/OS91SZH Engine question
 
 
Mike0251
Senior Heliman
Location: Hills of the Blue Ridge VA

Please see my post. Should have posted here first.
http://www.runryder.com/helicopter/t436230p1/
06-03-2008 04:53 PM
 
 
Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Assuming 16 thou of shim, the midrange will end up somewhere between 1/2 and 3/4 open. The high speed will be about 1.5 turns open. You MAY be able to go leaner than that (down to 1.25), but a lot will depend on your flying style and how heavily you load the engine, esp towards the end of the tank when it'll be leaner anyway due to lower fuel level. Remember that esp for harder 3D, the best performance from the engine is not necessarily going to come from the high speed setting which yields the max power in a largely unloaded situation. You MUST have fuel to make horsepower when you're really asking for it.

Ben Minor
06-03-2008 06:28 PM
 
 
Mike0251
Senior Heliman
Location: Hills of the Blue Ridge VA

Thanks Ben! My mid range is to rich, about 1.5-1.75 turns. I was inverted yesterday evening and nailed it...bogged a good bit. I knew it was rich but wanted to sneak up on it. And yes, towards the end of flight it does lean a little bit in level flight. A lot of conflicting info out there. Appreciate the response.
06-03-2008 07:27 PM
 
 
hornet dave
Veteran
Location: Pittsburgh PA USA

I went to the uniflow tank setup and the leaning at the last 1/3 tank went away. Of course, I also switched to an OS bubbleless clunk, so there is a chance that the clunk fixed the leaning, but I think it's really the uniflow that did the trick.

LaHeli Maxir - The only micro that matters
06-04-2008 09:04 PM
 
 
Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Absolutely. Uniflow can be a Godsend for a nonpumped engine.

Ben
06-04-2008 09:50 PM
 
 
1 page317 viewsPOST REPLY
Esprit Model . Thunder Power RC . Real Raptors

.
.
HIROBO Freya - Sceadu - Shuttle > Evo 90 w/OS91SZH Engine question
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Tuesday, October 7 - 9:36 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie