04-06-2023, 07:28 PM
Hi
I have just investigated this phenomenon! Only associated with oil level. My Special is parked nose down on a 3 to 4 degree incline. I’d mistakenly filled the oil to the full level on the dipstick and …..oil everywhere in the engine bay after a run. So O level geometry reveals that when parked nose down on a 4 degree incline the correct oil level is about 3/8” below the full level on the dip stick. The length of tank on a Chummy is about the same as the length of sump (sort of) so on a hill you’ll have 3/8” less fuel at the takeoff on a 4 degree incline.
Anyway…..I never let the tank get below about a gallon and carry a spare half gallon in a wing tank.
Cheers
Howard
I have just investigated this phenomenon! Only associated with oil level. My Special is parked nose down on a 3 to 4 degree incline. I’d mistakenly filled the oil to the full level on the dipstick and …..oil everywhere in the engine bay after a run. So O level geometry reveals that when parked nose down on a 4 degree incline the correct oil level is about 3/8” below the full level on the dip stick. The length of tank on a Chummy is about the same as the length of sump (sort of) so on a hill you’ll have 3/8” less fuel at the takeoff on a 4 degree incline.
Anyway…..I never let the tank get below about a gallon and carry a spare half gallon in a wing tank.
Cheers
Howard