Electric speed model

.Whilst at the British Nats 2015 where I was also helping my other brother Micky fly his 1/2 A speed model, I was taken in by Dick McGladderys electric speed model which is a new FAI class unfortunately I did not see the model fly.

On my return home I decided to have a look around the net to see what I could find including the current FAI rules, I sent out a few e mails to see what replies I may get, if any?

Daniel Janan was the only response I received, he was very very helpful giving me details of his models, plans, what type of motor and props including speed controllers and Li pos. Photos below, Thanks again Daniel.

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I have now been looking at what type of model to build as my first venture  into electric speed, I think we will start with a simple model such as the Pink Lady, construction will be balsa and ply all covered in glass cloth. I hope to build this over Christmas.

First mock- up Christmas Eve, now I must stop for a few days.

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14/2/16 Update, resumed work today to finish this model photo below. Maximum weight allowed 600gms, electronics weigh 300gms so the model must be no greater than 280/290gms complete.

Component weights so far

14/2/16                                                   21/2/16

Crutch                  29 gms                    Top block                      10gms

Wing                      42 gms                     Pushrod Bellcrank 16gms

Tail                            18 gms                   Cowel                              12gms

Elevator                  7 gms                     U/C bits                          10gms

Bottom block       12 gms                  Fibre glass                     10gms

Total                          107/108 gms      Ti skid                              5gms

Total                                                                                                           170gms

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21/2/16 update, model ready for painting total weight as seen 170gms, note extra cooling  holes at front and rear to help cool motor battery and speed controller.

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Model painted 175gms plus 7gms for wheel. Total 182gms     Run out of blue paint ? Maybe it should be red.

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I have not decided yet which type of U/C I will be using, dolly type or the old fashion plug-in type which drops out on take off,  l have fitted brass tubes already and will leave the decision until I try both systems first.

Weights of the electronics

Motor 102gms

Speed controller 41gms

Battery 147gms

Servo tester 9gms

Prop 6gms

Screws 1gm

Details of motor. Hobby King NTM 26-36 2700KV 595 watts      Esc 40 to 60 amp.                                                                                                  Prop 4.75 X 4.75 —-14.8V—-594watts 40A. 1.12Kg thrust.

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We are now nearing completion on this project all that is left is the flying, assuming all goes well we now have learnt a lot about what you can do, size of model and weights. Therefore I look forward to maybe the next model which will have a inrunner motor and asymmetrical model.

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Ready for first flights, will start with 3 cell followed by 4 cell. All up flying weight with 3 cell 452 gms.

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Also had to build a speed handle.

The model was test flown at the speed meeting at Croydon on the 29 May, the model flew very well with no problems. The only  problem was I only had 5.5 X 5.5 props where I needed 4.75 X 4.75 ones plus I only had 3 cell Lipos. I have now obtained props and 4 cell Lipos for the next tests. I have also got some different motors to try plus I have also made a model box for the model.

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