Got a noob question I wanted to put out there to the guys that may know. I am normally a sporty/combat/ and racing CL guy and I'm getting close to finishing my first carrier plane. Its an older Dumas Crusader. I'm going very old school and using 3 lines because I already have a 3 line control handle and didn't want to sacrifice an RC transmitter to do the current 2.4. The question is do you set the throttle for idle when the trigger is pulled back or the opposite? My gut feeling is I want the default position of the carb to be at full throttle in case the plane gets a bit loose on the lines. and I was going to install a light spring on the carb to load it to full throttle. So whats the correct install? Thx

Got a noob question I wanted to put out there to the guys that may know. I am normally a sporty/combat/ and racing CL guy and I'm getting close to finishing my first carrier plane. Its an older Dumas Crusader. I'm going very old school and using 3 lines because I already have a 3 line control handle and didn't want to sacrifice an RC transmitter to do the current 2.4. The question is do you set the throttle for idle when the trigger is pulled back or the opposite? My gut feeling is I want the default position of the carb to be at full throttle in case the plane gets a bit loose on the lines. and I was going to install a light spring on the carb to load it to full throttle. So whats the correct install? Thx

I would not recommend for the model's default setting to be "full throttle" when the plane gets a bit loose on the lines as you stated, this can result in a dangerous situation. When a carrier plane becomes loose on the lines, the model is not necessarily tangent to the circle, most of the time it is pointing inward, down, up or a combination of these characteristics, the model can 'snap' violently if full throttle is applied or the default.... IMO full throttle is the last option you want to employ.

Normally, as well as most of the time, pulling all the way back on the trigger is full throttle, pushing forward all the way is idle. All three lines are load bearing. Adding a rubber band or spring to the handles throttle lever to keep it forward in the idle position is also a way to insure idle is the set & default position at all times.

I always used the trigger back for high speed. I built a jig for the handle and bellcrank. The difference between the up/down and throttle length was the easy to compensate for in the lead outs, then all flying lines are of equal length. Today I find 2,4Ghz much easier and use  for all throttle planes.

Good catch Paul, I forgot that advantage, but that is exactly how I shut off my engines.
It it is good idea to be able to shut off the engine after landing. I have seen several people cut badly by slipping on the deck retrieving a running plane. The deck can get slippery after a while.

Rather than putting a spring on the aircraft, I'd make the control system as smooth and friction-free as possible -- this should make the throttle operate just fine.

Then don't lose line tension  .

I prefer a light rubber band to pull the trigger forward.  Worked pretty good for me.

A setup with no springs either way is unnatural.

Lawnmowers, tractors, full-scale aircraft, the throttles on RC planes, they're all set-and-forget.  Springs are natural for a piece of road machinery where idle is the fail-safe.  But Carrier planes don't normally belong on roads.