Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Engines and Mufflers


Engines and Mufflers Having problems or need advice on Engines or Mufflers?


Reply
 
Thread Tools Display Modes
Old 06-21-2008, 09:01 PM   #1
bobthehobo9
Registered Users
 
My HF Map location
Join Date: Mar 2007
Location: Tampa, Florida
Question Nitro newb needs help with throttle/engine setup!

I'll start out by saying that I've got several years of experience with rc helis under my belt but I'm a complete newb when it comes to nitro. I just finished building a Vibe 50 w/OS 50 Hyper and the whole engine/throttle setup has me a bit confused. Like I said earlier, I'm a newb to nitro so please bare with me!

My first question is at what throttle setting will the engine idle? Like in relation to the fully closed (triangular) mark on the carb... will the engine idle at the fully closed mark (don't think so but I could be wrong) or slightly above it?

On page 21 of the OS 50 Hyper manual it says to "fully retard the throttle trim lever and adjust the linkage so that the rotor is fully open when the tx throttle stick is fully advanced and fully closed when the tx throttle lever is fully retarded. The idle speed is then set by advancing the throttle trim lever to the point where the engine runs..." Is this how everyone does it or is there some other way?

The manual also says that when you start the engine, make sure that you have the throttle trim in the neutral position... that contradicts the part about advancing the trim until the engine idles...

if I'm leaving anything out that I may need to know please feel free to throw it in!

Thanks,
Erik
__________________
Vibe 50_____OS 50 Hyper, MP5 50, 401/9253, Rotortech 600, V paddles/ V tail blades

-Erik
bobthehobo9 is offline        Reply With Quote
Old 06-21-2008, 09:11 PM   #2
george0079
Registered Users
 
Posts: 1,610
 
My HF Map location
Join Date: Sep 2007
Location: Terra Firma
Default

Your idle setting really depends on the linkage mechanics, and the engine. Every engine is different, and every linkage setup is different.

Fully closed throttle IS fully closed. Heli engines do not have an idle screw.

If you have set up the linkage with no binding at high, and low, (With the trim all the way down) then center trim should get you fairly close to an idle.
__________________
If, at first, you don't succeed, then skydiving is probably a bad idea for you.
george0079 is offline        Reply With Quote
Old 06-21-2008, 09:25 PM   #3
forjer
Registered Users
 
Posts: 1,103
 

Join Date: Jan 2008
Location: Minneapolis area
Default

Try this (linkage setup), and this (throttle mixing).
__________________
It's amazing what you can do when you don't know that you can't do it. ~unknown
forjer is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Engines and Mufflers


Engines and Mufflers Having problems or need advice on Engines or Mufflers?

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com