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Single Engine, Twin Propeller Mosquito

By: Robert Lane

MosquitoWell its finished, one de Havilland 98 Mosquito with a Merco 35 two-stroke glow engine driving two props through a flexible drive bought from a B&Q store that had a drill chuck on the end for use with an electric portable drill. It is a near scale (stand off or stand back!!) of a mossy Mk IV DZ353,

Mosquitoof No 105B Squadron, based at Horsham St Faith and Marham, 1943 of 11.504 scale, with the throttle and aileron servos and battery pack in the port dummy engine pod and the RX, rudder, elevator servos and fuel tank in the fuselage. The tank is pressure fed from a nipple on the exhaust pipe. The wingspan is 56.5", wing area is 3.917 sq ft, an all moving tailplane is 0.861 sq ft, rudder is 0.184 sq ft. Wing loading of 27.5 oz per sq ft.

See: Twin Engines for a sketch of the drive unit.

I have used an all moving tailplane and rudder on lots of planes as it saves on hinges, horns, heavy push rods and means less work, also I don't get gaps with no hinges and in any case the Wright grothers used one engine with two props and all moving elevator allbeit at the front, the yanks said it was first used on the F86 Sabre fighter...bullsh!!.

The port wing has a charging socket and switch, a remote glow socket is near the engine, as I am right handed the motor is on the starboard side for safety reasons.

MosquitoThe registration number is not correct as it is not exact scale, I know some ex RAF men who worked on them and they are fussy about accuracy. My dad worked at a factory and watched them making plywood wings, he trained as a welder and sheet metal worker making navy signalling lamps and self sealing petrol tanks for planes, he took me to work one saturday to see the works at Glasgow Terrace on the Chelsea Embankment in London. At London Colney near St Albans at Sallisbury Hall, the birthplace of the first Mossy No W4050 was made, they have two being restored and many DH planes and engines on display. Well worth a visit. The Mosquito or mossy or wooden wonder or termites dinner as they were known were in service until 1953 and did every job any other plane could do up to 1944, and could deliver a 4000lb cookie bomb a thousand miles away.

MosquitoMy models are not show winners, I make them to fly not admire. I am not that good a pilot, brought up on single channel and reeds, so let others fly them as at 65 years my reactions are slower. I use a Sanwa 6 channel set with Hitech servos. Well there you have it, I will let you know how it flys.

The Mosquito is on its test stand with 3 blade props running full tilt, the blades have remained tight in the hubs so far, the thrust was equal I could turn it with rudder input either way, I used a thrust race to avoid friction.


The Mossy has only taxied so far and will not take off on grass I think its a bit under powered its got a lot of pull, but I'm waiting to try on a hard runway.

I'm now clearing my workbench for my next project - an Autogiro...

Robert Lane