LeBlond 60-5D-5RA - (ATC 12) - 65hp
Built by: LeBlond Engines Incorporated, Cincinnati, Ohio
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| A close up of the LeBlond 60-5D mounted on LC-11, X7997 |
The second engine to be used for the LC-11 prototype
(X7997), the LeBlond 60-5D-5RA was a five cylinder, air cooled rotary engine
developed from the Detroit Air Cat and introduced in 1928.
Rated at 65 horse-power and capable of 1,950
revolutions-per-minute the 60-5D had a dry weight of 228 pounds giving her a
power to weight ratio of 1 HP to 3.5 pounds engine weight. Cylinders and
pistons were made of Aluminum Alloy, with a 4.125 inch bore and 3.75 stroke.
The engine displacement was 250.58 cubic inches with a direct drive crankshaft.
Articulated connecting rods were made from drop forge, nickel
chromium steel. The engine was fitted with a Stromberg carburetor and Scintilla
magnetos. Oil lubrication was of the full pressure, dry sump variety.
This engine was used by Babcock for the LC-11 monoplane and
equipped all three known examples; X7997, X551E and NC889E.
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| Plate from "The Aircraft Handbook" - Public Domain |
REFERENCES:
1. Approved Type Certificate (ATC) No. 12 – Document for
LeBlond 60-5D-5RA
3. The Aircraft Handbook; a collection of facts and suggestions
– by Fred Herbert Colvin – 1929 – Pgs 205-217 – Entry on LeBlond 60 engines.
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