Shortround6
Major General
In another thread a discussion came up about the "efficiency" of a couple of opposing engines. I don't have the information on the DB engines in the 109 but from "AHT"
the figures for the P-40 are as follows.
model.....................P-40........P-40C...........P-40E...........P40F.............P-40N
Engine section..........293...........298.............345..............349................335
engine....................1345.........1357............1307............1518..............1340
engine accessories....114...........114.............106..............114.................92
eng. controls.............22.............21..............26.................8..................29
propeller..................342...........337.............383..............386................417
starting...................42..............46...............43...............34.................45
cooling....................291.5........291.5...........294...............306..............235
lubrication................59.5...........62...............61................64................92
And fuel system........171.............420............425...............437..............366
All numbers are in pounds.
The engine section includes the cowling/engine covers, engine mounts, radiator/oil cooler ducts and adjustable flaps and intake duct.
Engine accessories can include pumps (vacuum, air, hydraulic, gun sychronizers, exhaust stubs and other bits and pieces. Exhaust flanges are included in the dry weight of the engine but the exhaust pipes that are welded to them are not. The flanges,gaskets, and nuts are supplied with the engine. the Exhaust stubs are fabricated and attached by the airframe maker.
Starters are a combination electric and inertia in this case, the planes without electric starter (hand inertia only) had a starter weight of 8lbs.
Generator is in another category, "electrical".
Fuel system weights jump so much because of going from unprotected tanks to protected tanks and perhaps even changing type of tanks. Fuel system weight (tankage) is the weight that will change the most from type of airplane to type of airplane. The weight also includes piping, valves, and any auxiliary or transfer pumps.
Different companies and even the USAAF sometimes placed certain components in different categories at different times so one does have to be careful when making comparisons.
I also don't get exited about differences of 1-3% in a given category as that may be just normal production tolerance.
the figures for the P-40 are as follows.
model.....................P-40........P-40C...........P-40E...........P40F.............P-40N
Engine section..........293...........298.............345..............349................335
engine....................1345.........1357............1307............1518..............1340
engine accessories....114...........114.............106..............114.................92
eng. controls.............22.............21..............26.................8..................29
propeller..................342...........337.............383..............386................417
starting...................42..............46...............43...............34.................45
cooling....................291.5........291.5...........294...............306..............235
lubrication................59.5...........62...............61................64................92
And fuel system........171.............420............425...............437..............366
All numbers are in pounds.
The engine section includes the cowling/engine covers, engine mounts, radiator/oil cooler ducts and adjustable flaps and intake duct.
Engine accessories can include pumps (vacuum, air, hydraulic, gun sychronizers, exhaust stubs and other bits and pieces. Exhaust flanges are included in the dry weight of the engine but the exhaust pipes that are welded to them are not. The flanges,gaskets, and nuts are supplied with the engine. the Exhaust stubs are fabricated and attached by the airframe maker.
Starters are a combination electric and inertia in this case, the planes without electric starter (hand inertia only) had a starter weight of 8lbs.
Generator is in another category, "electrical".
Fuel system weights jump so much because of going from unprotected tanks to protected tanks and perhaps even changing type of tanks. Fuel system weight (tankage) is the weight that will change the most from type of airplane to type of airplane. The weight also includes piping, valves, and any auxiliary or transfer pumps.
Different companies and even the USAAF sometimes placed certain components in different categories at different times so one does have to be careful when making comparisons.
I also don't get exited about differences of 1-3% in a given category as that may be just normal production tolerance.