The Ki-88 was to have a 1, 117-kW ( 1, 500-hp ) Kawasaki Ha-140 engine behind its cockpit, driving a tractor propeller through an extension shaft . It was to mount a 37-mm cannon in its propeller shaft and two 20-mm cannon in its lower nose.
22.
The designer of the Westland F . 7 / 30, Arthur Davenport, initially opted for a monoplane with the engine buried in the fuselage over the wing centre section, driving a tractor propeller through a long extension shaft . This put the pilot in front of and slightly above the engine, so that he also had an excellent forward view.
23.
The forward part of the SB-5's fuselage was designed around the Salmson 18Cmb water-cooled radial engine, which was set back from the propeller on a extension shaft . The fuselage was built around four longerons but had a near-circular cross-section shaped by formers and covered with elevator trailing edges were level with the rudder hinge.
24.
The last in the series was the "'VG-39 "', originally powered by the new 882 kW ( 1, 200 hp ) 12Y-89 using an extension shaft on the propeller to streamline the nose profile, giving the plane an excellent speed of 625 km / h ( 388 mph ) even when loaded down with two more machine guns.
25.
In October 1942, the contract for two prototypes, designated " XP-75 ", was signed with the Fisher Body Division of GM . The design concept was to use the outer wing panels from the North American P-51 Mustang, the tail assembly from the propeller driven through an extension shaft . At an early design stage, however, Curtiss P-40 Warhawk outer wing panels were substituted for the P-51 panels.
26.
The front bearing was held in place by four vanes, with the " left " one as seen from the front containing a power takeoff shaft . One unique feature of the Atar designs was the separate Atar 5000 accessories section, which could be mounted in front of the engine, driven by an extension shaft . The combustion area consisted of twenty steel flame cans arranged in a " canular " layout, exiting into the single-stage turbine.
27.
Fenwick and Sydney T Swabey designed a second aircraft for Planes Limited in 1911, this being a single-engined pusher monoplane powered by a 45 hp ( 34 kW ) Isaacson radial engine, which was mounted in the aircraft's nose, driving a two-bladed propeller by a long extension shaft . Pilot and passenger sat side-by side in the fuselage nacelle, which was mounted below the aircraft's wing, with the propeller shaft passing between them.
28.
Chrysler's solution to this problem was unique; power was instead taken from the middle of the engine, placing the propeller reduction gear in a gap between two V-8 cylinder banks and sending power to the front of the engine via a long extension shaft running below the crankshaft . Additionally many of the accessories were driven off the drive shaft instead of the crank shaft . This solution also raised the weight of the engine by the amount of the shaft, but it was apparently a price worth paying.
29.
After takeoff a clutch at the end of the crankshaft could be engaged which drove a step up gearbox with a ratio of 13 : 21 to an extension shaft that powered the compressor of the VRDK . The air for the compressor was fed through a long duct that ran from the inlet underneath the propeller spinner, thence under the engine and through the belly of the aircraft . This duct also fed air to the oil cooler near the engine, but the water radiator was positioned behind the compressor to maximize airflow over it.
