Installations (1.7M pdf)

Macchi-Castoldi MC-72
Fiat AS6 engine; dual V-12, 3100 total HP,
each engine drives one very course, fixed-pitch prop
440.729 mph in 1934. Class record still stands.
Why contra-prop? Supermarine S6B w/ 2650 HP on single prop
overloaded one float by 32% on takeoff due to torque
Kawanishi N1K1 Kyofu
Ha.32/14, prop maker unknown
Supermarine Spitfire MK 46: Griffon, Rotol
Vought F4U-1 Corsair: R-2800, Hamilton Standard
Douglas XTB2D-1 Sky Pirate
R-4360, Hamilton Standard
Martin-Baker MB-5: Griffon, Rotol
Northrop XB-35: R-4360, Hamilton Standard
Douglas XB-42: 2 x V-1710, Curtiss electric
Hughes XF-11: R-4360, Hamilton Standard
Northrop XP-56
R-2800
Curtiss electric
Republic XP-72
R-4360, Aeroprop
Boeing XF8B-1: R-4360, Aeroprop
Douglas A2D Skyshark: XT-40, Aeroprop
Fisher XP-75 Eagle
V-3420, Aeroprop
Levitz/Rogers P-51R
Griffon, de Havilland
Fairy Gannet Anti Submarine Aircraft
Armstrong Siddeley Double Mamba
Turboshaft Engines, 3035 hp total
Independently Controlled 4 blade Rotol
Contra-Rotating Propellers
Westland Wyvern S.4
Armstrong Siddeley Python
A.S.P.3, 4110 hp
Rotol
Bristol Brabazon: Coupled Centaurus, Rotol
Convair R3Y-1 Tradewind: T-40, Aeroprop
Lockheed XFV-1
YT-40, Curtiss electric
Convair XFY-1
YT-40, Curtiss electric
Saunders-Roe Princess
Coupled Proteus, Rotol
18 foot, 4 inch to 20 foot, 4 inch AV-60 series contra-props on 4 engine Tu
95-Bear / Tu –144 Transport
Max speed: 545 mph. Prop spins approx. 800 rpm @ cruise
14,000 hp Kuznetsov turbo shaft engine
13 compressor stages, 5 turbine stages, double reduction gearing
Sergey Ribasev, Airliners.net
Progress Bureau D-27 turboshaft engines on Antonov-70 transport
12,000 to 16,000 HP
Stupino SU-27 propellers: 8 blades in front; 6 blades in back
13 ft. 10 in. diameter, composite construction
Acknowledgements
Kim McKutcheon
Graham White
Dr. Guido Sperl of Hoffman Propellers AG
Bill Painter, Kalamazoo Air Museum
The patient and attentive audience
Repair guidelines for
pits or indentations in
forged aluminum
propeller blade.
Depending on position
and depth of the defect,
the pit can generally be
ground smooth so that
the taper is 5 to 10x’s
the depth of the defect.
Note that larger and
deeper defects are
allowed towards the tip
of the blade.
Reno 1988:
Oil line on
Precious Metal
fractured,
props went
flat, engine
and prop
oversped,
spinner blew
apart,
necessitating
belly landing
by Don
Whittington
Dick Hill
Dick Hill
Dick Hill
When the blades of a spinning contra-prop fold back while belly
landing, the blades crash head-on into each other, explaining the nasty
leading edge gashes and corkscrew shape of the forward prop blades.