Throttle Return Spring
10-14-2014, 07:13 AM
#29
Do as you please but I use a quality servo and clip the spring ends off the spring, been doing it this way for a good many years.
Bob
Bob
Last edited by sensei; 10-14-2014 at 07:16 AM.
10-14-2014, 07:27 AM
#30
When one considers the forces transmitted to a servo by the deflection of a control surface into the air passing over the model at speed the force transmitted to a throttle servo from the throttle spring seems miniscule in comparison. If a servo is going to suffer damage/failure due to the small amount of force from the throttle spring one has to wonder if the servo should be used at all. In all my years flying gassers I have never removed/altered the carb spring. The only concession I ever made was when there was no end point adjustment and a servo saver was used so the servo was never stalled out at the end travel of the carb.
Dennis
Dennis
10-18-2014, 07:50 AM
#33
Join Date: Oct 2002
Location: Lyndonville, VT
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While I do leave the spring connected with a Walbro style carb, I also understand that these carbs were not intended for our use, and certain things need to be changed when using them in an RC aircraft, the first and most important, throw away the throttle stop screw that is needed on typical lawn equipment, since it's important to be able to kill the engine from the radio via the throttle servo. Also the hole in the choke plate is there to reduce the chance of flooding the engine with a pull start and to allow the engine to actually run real rich with the choke fully on. I find that my gassers hand start easier with the choke hole soldered over.
Pete
Pete
10-19-2014, 03:47 AM
#35
Thread Starter
After speaking to the tech rep, I am going to be in the " leave the spring in place camp". I am using a good servo so I will see how that goes. Thanks for all the replies.
