|Going Electric - With Electro Flyer!|
Just coming into July and what has happened to the weather? Nice and sunny sometimes but when ever I have had the chance the wind has just been too high to get down to the field - just a couple of days this month (not that I get a lot of time anyway).
The Models Front
Right then - back to business - electric models. Due to weather problems I have not been able to fly the models covered here so you will have to wait until next month for the final outcome.
I will cover the development of my "Cell Rat". I
decided that it would go like "stink" on 16 cells and it had
the wing area to carry the weight. Due to previous pilot error (I am not
too proud to admit it!) I was short of a fuselage for my Cell Rat. In
case you don't know the model it is a 66" span aerobatic model with
fully symmetrical wing section and an all in line make up (engine
thrust line, wing centre line and tail plane are all in line). probably
not what the average electro flyer out there is flying! - Anyway, I decided
to borrow the fuselage from my "Rat Off The Hill", the slope
version, so out came the hacksaw and I took the front straight off it.
I just needed it to test a theory! Using a standard .60 size engine mount
(slightly opened out) I mounted my Sport Twin Team Gear unit on the front.
- The Spitfire.
I got rid of the speed 400 and gearbox, opened out the inner bulkhead so that I could get a speed 480 in place on the correct thrust line. I then made a new front former that fits to the outside of the original one and held in place with 3 small screws. This also has cooling holes in for the motors, which is mounted on it.
had a good look at things after the earlier very short unsuccessful flight
I realised that the grain on the front of the battery compartment ran
in the wrong direction and had split. This not only let the battery move
forward but would mean that the battery cover would fall off if it did
so. Not so good in the air when using a BEC!
The old Butterfly with the Team Gear Mini Single will also be under further tests this month and I will update that next time as well.
I think that we all know that the biggest set back with electric flight has been the weight of the battery and the principle that the smaller they get the less power they have. So if we could have a 3000mah cell that was is rated at 3.7V giving a charge voltage of 4.2V and measures 5.4mm x 64mm x 95mm and weights just 63g we would only need 2 of these in the average model which would save us about a third of the battery weight in our models. Impossible! - NO! - I have some on their way to me for evaluation - maybe not by next month but certainly by the one after. I just hope they are as good as they sound as they could re-revolutionise electric flight.
I will most definitely report on these as soon as they are with me. (I know there are already a few of these floating about out there but I hope to bring all of you news of this revolution!).
I should also have a Dimwatt, Discus and T-Strike for review over the next month or three. I will do these together, spread over a couple of months.
Have fun and good luck with the weather!