piston engine degraded perfs
Thread Starter
Joined: Aug 2003
Posts: 155
Likes: 1
From: France
piston engine degraded perfs
Hi everybody,
Has anyone ever experienced a partial loss of power - about 2 inches on R22 in hover,
and at the same time a significant distorded radio reception ? If so would you care to explain the root cause(s) of this ?
Thanks in advance.
ATN
Has anyone ever experienced a partial loss of power - about 2 inches on R22 in hover,
and at the same time a significant distorded radio reception ? If so would you care to explain the root cause(s) of this ?
Thanks in advance.
ATN
Last edited by ATN; 30th October 2022 at 16:50. Reason: add parenthesis
Joined: Nov 2006
Posts: 1,951
Likes: 90
From: After all, what’s more important than proving to someone on the internet that they’re wrong? - Manson
Magneto gone bad? They don't last on R22 as they are exposed to too much heat. You are getting radio interference as well? Good indicator that something is amiss.
Close monitoring of any trends in MAP at 100% RPM and flat pitch can tell you lots of things. Compare the MAP required to maintain 100% on L to R. Good indicator of general health of the engine. Obviously the lower the MAP the larger the power margin you may have - generally. Also can be an indicator that your "flat pitch" might be in the ballpark as well. The more "efficient" the engine is the less throttle opening (MAP) will be required versus a fixed load to maintain 100%.
Also check your mags before "every" takeoff not just each flight. Saves you from flying around with one when you think you have two.
Close monitoring of any trends in MAP at 100% RPM and flat pitch can tell you lots of things. Compare the MAP required to maintain 100% on L to R. Good indicator of general health of the engine. Obviously the lower the MAP the larger the power margin you may have - generally. Also can be an indicator that your "flat pitch" might be in the ballpark as well. The more "efficient" the engine is the less throttle opening (MAP) will be required versus a fixed load to maintain 100%.
Also check your mags before "every" takeoff not just each flight. Saves you from flying around with one when you think you have two.
Thread Starter
Joined: Aug 2003
Posts: 155
Likes: 1
From: France
I posted this question on behalf of the R22 friend pilot who is not on the forum. Thank you for your replies. The mags are OK. The problem discovered on the electrical bench was a defective shielding of the spark plugs wires which caused the loss of power and the interferences on the com equipment. RVDT, thanks for the tip re the engine health check.
Cheers
ATN
Cheers
ATN
