Evening All
AT LAST! I am now back into my comfort zone building a model of a real aeroplane ie a pusher! It has been around 20 months since I completed one, so it is high time that I started another and got back to normal. Pushers are basically wire entanglements with an engine and undercarriage attached, which makes them simultaneously simple to make the parts for, and interesting to look at. In terms of scratch building they have few complex components and are interesting to assemble. Only the rigging presents a challenge but even that can be overcome with a systematic approach.
The 6th machine to compete in the Gordon Bennett air race in 1911 was a "Baby" Wright model R. Only two of these machines were built: the first, also called the "Roadster" was constructed in the USA in 1910 for racing. A Ogilvy flew it in the Gordon Bennett air race held at Belmont Park in New York and then had it shipped to the UK where he flew it from his private landing ground at Camber in south Kent, and later in the GB race at Eastchurch in July 1911. A second smaller variant called the "Baby Grand" was also built by the Wright brothers for the Belmont race but it crashed and was wrecked at the end of October 1910. It was rebuilt with longer span wings and a 4 cylinder inline engine and flown for exhibition shows.
Originally the "Baby" Wright was powered by an 8 cylinder engine, but after Ogilvy brought it to the UK he replaced the engine with a 50hp NEC 4 cylinder V two stroke engine. It was with this engine that he flew it in the 1911 Gordon Bennett race. Like most aeroplanes of this period changes were regularly made and this, combined with a lack of drawings, makes building a model a little tricky. However there are several photographs of both machines, but importantly there are sufficient photos of Olgivy's machine taken at Eastchurch to make it possible to build a reasonably accurate replica.
Photographs of the Roadster and Baby Wright can be found at:
https://www.wright-brothers.org/Information_Desk/Just_the_Facts/Airplanes/Model_R.htmand of Ogilvy's machine at Eastchurch at:
https://flyingmachines.ru/Site2/Crafts/Craft28506.htmI started as usual by cutting out the wings and tail surfaces from 30 thou plastic card whcih had been curved by immersing the card in boiling water in a length of pipe:
The propellors were a strange shape so I experimented by carving one from plastic strip, and then from a scrap of wood to ensure that my method worked. Finally I cut two lengths of wood to carve the propellors for the model:
I made the tyres for the wheels by winding some 25 thou rod around the handle of a small paintbrush. The diameter of the handle was slightly smaller than the wheel disc so that the tyre will spring on to the disc. The rod was immersed in boiling water for about 10 seconds.
When the plastic has cooled it can be removed from the handle and cut to the required length:
I cannot find a clear photo of an NEC engine so I am using what information I can glean from photographs and modellers license. I have made an engine block and added the cylinders as a start: more details will follow:
Thanks for looking.
Stephen.