RE: Bob Cat Copy Falcon 120 Jet
Hi Ray, welcome aboard,
1 - I used some robart hinges and some pin hinges, dont use the mylar plastic hinges supplied.
2 - undercarriage, dont know this type, others can help I have used the Graupner units really really cheap, i think they were great, lasted for quite some time, and ok if model is kept light and fly off tarmac, I upgraded to the Euro kit plastic units as i fly off grass. Eurokits are about 1.5 mm too wide to fit in wing and nose rails so either need to file the side of the plastic retract unit down or take a bit off the hardwood rails. They are cheap and cheerfull but work well another and withstand a bad landing.
3 - Didnt remove any of my frames, i used a dremel and sanding drum to remove small amounts to allow tank to fit, use a Persil wahing liquid bottle fits well and is a good material, doesnt crack in winter and cap has lots of threads. It is stumpier than a coke bottle, so helps to keep the fuel closer to the CG.