C-172R magnetos
Thread Starter
Joined: Nov 2003
Posts: 126
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From: Australia
C-172R magnetos
I couldn't find any info in the POH or doing a search so maybe one of you ppruners can help
re: hand swinging C-172R
My understanding is that for most power assisted starts, the right mag is grounded as the impulse coupling is installed on the left mag.
My question is when hand swinging a C-172R should the mags be on both or left?
Or in other words - is there an impulse coupling on both mags or just one in the C-172R?
Thanks in advance
Rob.
ps. i found in the equipment list that the mags and harnesses are 'slick 4371' type if that helps anyone. (From the manual i get the impression that both mags are the same which has got me thinking impulse coupling on both..........?)
re: hand swinging C-172R
My understanding is that for most power assisted starts, the right mag is grounded as the impulse coupling is installed on the left mag.
My question is when hand swinging a C-172R should the mags be on both or left?
Or in other words - is there an impulse coupling on both mags or just one in the C-172R?
Thanks in advance
Rob.
ps. i found in the equipment list that the mags and harnesses are 'slick 4371' type if that helps anyone. (From the manual i get the impression that both mags are the same which has got me thinking impulse coupling on both..........?)
Joined: Dec 2002
Posts: 321
Likes: 0
From: Bristol and Forest of Dean
Hi Rob,
The Slick 4371 is a 20degree lag L/H rotation magneto, so yes it is an impulse mag. If fitted with two its probably best to hand swing the aircraft with both 'on'. The idea behind grounding the non-impulse is the reduce the chance of the engine kicking back from the non-retarded R/H mag.
The 0320 is usually fitted with the 4373/4370 combo, the 4373 being a 25degree impulse.
Having said that, a double impulse setup would always be better for hand swinging
Kingy (a bit of a Slick mag geek, having just bought a load at vast expence...!)
The Slick 4371 is a 20degree lag L/H rotation magneto, so yes it is an impulse mag. If fitted with two its probably best to hand swing the aircraft with both 'on'. The idea behind grounding the non-impulse is the reduce the chance of the engine kicking back from the non-retarded R/H mag.
The 0320 is usually fitted with the 4373/4370 combo, the 4373 being a 25degree impulse.
Having said that, a double impulse setup would always be better for hand swinging
Kingy (a bit of a Slick mag geek, having just bought a load at vast expence...!)
Joined: Dec 2002
Posts: 321
Likes: 0
From: Bristol and Forest of Dean
100LL
Yes, it seems you are right. The answer is still the same though - If it's got 2X4371s, it's got two impulse mags so both on for starting either by hand or with the electric starter IMHO.
Kingy
Yes, it seems you are right. The answer is still the same though - If it's got 2X4371s, it's got two impulse mags so both on for starting either by hand or with the electric starter IMHO.
Kingy
