Shack 29H
Well-Known Member
- Joined
- Mar 6, 2020
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Was out messing with slow roll mechanics today and the engine kept stumbling when left wing 90 deg down and close to full top rudder,
positive G. Had 8-9 gallons in the 12 gallon header tank. C-85-12F with Marvel Schebler MA-3SPA carb. Right wing down was no problem with full top rudder. Tried it knife edge for 15-20 seconds with no rudder (or wing loading) and the fuel delivery was unaffected no matter which wing was down.
Tried it several times left wing down, hard top rudder, and hawked the G meter to make sure I wasn't unloading to 0 or negative G. Almost had it quit entirely once, which got my attention as I don't have a starter.
Any ideas?
I was under the impression that as long as there was some positive G the engine wouldn't fuel starve.
positive G. Had 8-9 gallons in the 12 gallon header tank. C-85-12F with Marvel Schebler MA-3SPA carb. Right wing down was no problem with full top rudder. Tried it knife edge for 15-20 seconds with no rudder (or wing loading) and the fuel delivery was unaffected no matter which wing was down.
Tried it several times left wing down, hard top rudder, and hawked the G meter to make sure I wasn't unloading to 0 or negative G. Almost had it quit entirely once, which got my attention as I don't have a starter.
Any ideas?
I was under the impression that as long as there was some positive G the engine wouldn't fuel starve.
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