Reserve tank 33 gallons [41.25 U.S.]
Total 130 gallons [162.5 U.S.]
(ii) Fuel consumptions (in Imperial gallons per hour):
Approximate consumptions at 12,000 feet are as follows:
Climbing ----- at 2600 r.p.m. and 35 in.Hg. boost 84 [105 U.S.]
Cruising ----- at 2600 r.p.m. and 35 in.Hg. boost 84 [105 U.S.]
-- (mixture at 2280 r.p.m. and 29.2 in.Hg. boost 52 [65 U.S.]
-- control at 2280 r.p.m. and 27.9 in.Hg. boost 50 [62.5 U.S.]
-- "Auto-rich" at 2190 r.p.m. and 25.2 in.Hg. boost 42 [52.5 U.S.]
Note: It is possible to improve on the last cruising consumption by
weakening the mixture as described in para. 12.
Tye Lett's additional notes on the Allison
[Like the Tomahawk manual, the following notes came from the copies of the
Pistole Collection at the NASM Archives. The repetition between part 1 and
part 2 is in the original. "sic" indicates a typo in the original.]
ALLISON ENGINE
FIELD SERVICE MEMORANDUM
FAR EAST NO.2
RANGOON, BURMA
September 26, 1941
To: Col. C. T. Chien.
From: Tye. M. Lett, Jr.
SUBJECT; STARTING PROCEDURE, ALLISON MODEL V 1710 C 15 ENGINES
1. The Starting procedure described below is the latest as recommended by
Allison for the V 1710 C 15 Engine.
2. It is observed that several methods of starting subject engine are in
use at various points.
3. To provide specific instructions regarding procedure it is suggested
that this information be relayed to all pilots and ground personnel
concerned with the operation of Allison Engines.
1. PROPER STARTING PROCEDURE
The priming system on all Allison engines is independent of the
carburetor, and pumping the carburetor throttle will not discharge fuel
into the engine, as all fuel is injected by the fuel discharge nozzle to
the supercharger inlet, where it is mixed with the air passed through the
carburetor throttle openings.
(a) Set propellor [sic] to manual low pitch.
(b) Carburetor Heat Control should be in the OFF position.
(c) Set throttle at position corresponding to 1000-1200 R.P.M.
(d) Set carburetor manual mixture control in IDLE-CUT-OFF POSITION, and
operate the wobble pump to maintain a fuel pressure of 4 lbs./sq in.
(e) Energize starter.
(f) Prime a COLD engine with not over two strokes for a large size primer,
or four for a small size primer. For a WARM engine, one stroke with large
primer; or two with a small size primer is sufficient.
(g) Turn on ignition switch and engage starter. When propellor turns,
maintain fuel pressure by wobbling; and as engine starts firing, move the
Summary of Contents for P-40 Tomahawk
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