RCS180 idle trim
06-09-2003, 05:51 PM
#1
RCS180 idle trim
I have had an RCS180 for over a year. I flew it last summer in a Hangar 9 73" CAP. This year I put it in a Dynaflite PT19 that weighs 17 lbs, 89" span.
Engine ran fine last year - has a Zinger Pro prop, 20x8 turning 7K
Cowl has plenty of holes for airflow over head.
The problem is that when I adjust the idle after starting, it is significantly different after a 10 minute flight. The idle is higher at the end of the flight and sometimes I run out of trim trying to get the idle down to land. It never did this before
I have a new Futaba 9CAP radio and an R149DP radio. Last year, I was using an 8UAPS. The (C radio has never been in another plane so I don't know if the radio could be at fault.
The first few flights of this plane, the throttle would surge as if I was getting RF interference on the throttle channel. I bundled up the wiring in the fuselage and the problem went away. The throttle pushrod is forward of the receiver and is a steel rod inside of a nyrod tube. I have a plastic servo arm and throttle arm and the pushrod is connected by keeper blocks and screws.
It is tough to land with a high idle and dangerous if the engine goes deadstick so I really need to get the idle to stay put.
I have a call into RCS.
Gas is 87 octane and klotz 2 stroke oil at 50:1
Plane has flown 8 times
Engine ran fine last year - has a Zinger Pro prop, 20x8 turning 7K
Cowl has plenty of holes for airflow over head.
The problem is that when I adjust the idle after starting, it is significantly different after a 10 minute flight. The idle is higher at the end of the flight and sometimes I run out of trim trying to get the idle down to land. It never did this before
I have a new Futaba 9CAP radio and an R149DP radio. Last year, I was using an 8UAPS. The (C radio has never been in another plane so I don't know if the radio could be at fault.
The first few flights of this plane, the throttle would surge as if I was getting RF interference on the throttle channel. I bundled up the wiring in the fuselage and the problem went away. The throttle pushrod is forward of the receiver and is a steel rod inside of a nyrod tube. I have a plastic servo arm and throttle arm and the pushrod is connected by keeper blocks and screws.
It is tough to land with a high idle and dangerous if the engine goes deadstick so I really need to get the idle to stay put.
I have a call into RCS.
Gas is 87 octane and klotz 2 stroke oil at 50:1
Plane has flown 8 times
