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#1
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337B Philadelphia PA |
#2
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Quote:
If the accum. was working, as soon as the prop lever was moved up out of the feather position, the oil pressure in the accum. would move the blades to their normal operating position, which would force the prop to start windmilling. Engine is spinning at this point, ready to start, without ever touching the starter. Just get the throttle/mixture setting correct, and it will fire right up! I read you have to service the nitrogen in the accumulators every 90 days. Seems as if theirs had not been serviced recently. So glad I have my own nitrogen tank for servicing struts, would work for the accum. as well. Last edited by mshac : 08-27-20 at 12:15 PM. |
#3
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The rear accumulator was mounted on the RT side of the engine mount. the front was mounted in the nose wheel well forward of where the nose gear would be when retracted. The plane also had Woodard governors on it
Kim |
#4
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Did you use them?
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#5
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Along these same lines, have not been able to get my props to feather on the ground. What has been others experience? Trying to figure out where to go from here. Props just serviced and out of prop shop. We've played with control cable rigging without change. Governor problem?
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#6
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I must admit - the "feathering gates" are a BAD idea!
Every other twin I've trained in and flown, you pull the prop levers all the way back, the props feather. Not so with the 337 - Cessna felt an additional memory item was required in this most critical time - "lift the prop control into the feathering gate". When I first flew the plane, I didn't realize these "gates" existed, and had I tried to feather a prop in a true emergency, I would have failed because WHY DID CESSNA PUT THESE RETARDED GATES ON THE PROP LEVERS??? I guess they thought Skymaster drivers were so dumb, they may accidentally feather a prop. What other possible reason? Rant over! I love the Skymaster, but I won't pretend its perfect. That said wslade2, how are you going about testing feathering? Prop has to be spinning to release the feathering locks. You can't just feather it with the engine shut off. I'm sure you know that, but a lot of pilots, especially those coming out of singles, don't truly understand how fully-feathering props work. Last edited by mshac : 08-28-20 at 09:29 AM. |
#7
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I sure they were used during check rides if an engine was pulled. We did remove them during an engine change. The rear mount was repaired in the area where the accumulator was mounted and was going to take some engineering to remount it. so we decided to just remove them.
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#8
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On the feathering issue: am aware of gates. In attempt to feather on ground, run up engine/warm up, then smartly pull back throttle and prop control being sure to lift up and over gate. No joy on seeing prop in feather position after engine stops. It's been a while but pretty sure manual says prop feather supposed to happen like that. Watching video earlier in this thread, looks like would be assured steady decent on one engine if am unable to feather a prop, but hope of maintaining altitude if prop would feather.
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#9
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wslade,
At what RPM are you at when you try to feather on the ground? If your RPM is not high enough(>1700 approx.), the feather latches will not have moved out of the way. I may be the only one that likes the feather gates...they seem logical to me, much like aircraft I have flown (turboprop) that has a reverse gate. It is a helpful small step that makes you really "think" about the action you are taking - ensuring you intend on feathering. Jeff |
#10
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The gates totally make sense to me and in fact when flying other piston twins and singes I can't believe they don't have gates. I too have lots of time in TurboProps so it was easy for me to use the gates when going into Beta with those
wslade, when you do your run up before takeoff based on the book, there is no feather? I pull the levers up in high pitch then bring them back to feather. Try leaving the props in high RPM and lift up the lever then pull all the way back (down)
__________________
Herb R Harney 1968 337C Flying the same Skymaster for 47 years |