The original intention was to create a series of combat “ Bump ’ n go ” series of Warbirds with a centrally mounted motor and propeller to reduce damage to the enemy , but the first attempt turned out to be a rather tubby cartoon character . I had great difficulty getting the CofG anywhere near the correct position , in fact it was so rearward that the plane was almost an un-flyable disaster .
Moving on , the concept was for a low cost and quick easily built model of scale profile and good flying characteristics that would capture the interest of members and could be produced “ en masse ” as a club group build project . The design is worked
Bump n go
around a 2200MAh Lipo battery , a brushless outrunner motor producing between 300 and 380 watts on 11 volts and a 30 to 50 Amp ESC , all of which many members have or can purchase cheaply .
Profile warbirds
Profile combat
Profile Motor Mount / ESC recess The wings are hot wired from white foam ( scrounged from builder ’ s demolition ) and the cores are cut down the spar line and a channel is cut into the rear half to allow access for the aileron servo wires .
For reference , I have used the Richard Ferriere Free Plan 3 views , available on the web at ... http :// richard . ferriere . free . fr / 3vues / 3vues . html and then scaled and adjusted the lines and proportions to suit the project .
Construction is of brown paper and foam , with the fuselage having a tapered foam core , some 30mm wide at the front , thinning down to 6 / 8mms at the rear , and sheeted each side with 3.00 mm balsa ( the most expensive part ) glued on with Gorilla polyurethane glue .
Profile Mustang Cores
Profile Fuz Construction Before sheeting , appropriate channels are cut in the foam to accommodate the servo wires back to the centrally placed receiver box . After sheeting , recess boxes for the ESC and Receiver are cut into the fuselage ( Port side ) and the battery box Starboard side front , and lined with 3.00mm balsa , all contributing to a very rigid structure . The motor mount plate is a 64mm round disc of 6.5mm liteply epoxied into the slotted fuselage front and faired each side with a piece of shaped triangle stock balsa . Pre-fit the motor and glue in the t / nuts before epoxying into fuselage .
Profile wing servo access channel The carbon capped 3.00mm hard balsa sheet spar is epoxied in . It is better to measure the sliced cores and cut the spar balsa to fit , allowing for the thickness of the carbon caps . I prefer to make my own carbon laminate , laying up Carbon uni and cloth on a glass sheet under vacuum .