Graham Rousell

Hi Paul,
I spoke with a nice chap at Robotbirds. He gave me some leads for motors and ESC, but the key point he said was that it was best to build the model, balance and then weigh it before committing to any solution. I must admit this also makes some sense as I have no idea on the ground clearance for a prop or if any additional weight may be needed to balance around the CofG. So it seems I need to get back up in the loft and finish the construction, as much as possible anyway.
Take care and speak again soon. Thanks again,

Graham.

Hi Paul,
Many thanks for the leads, my thoughts and order of preference may be…..
1. The Turnigy. It seems a very good offer, however I notice it recommended a much larger prop than I think could probably fit with the model (12×6). The one provided with the gas engine kit was a 10×6, but from the on-line calculations for electric an 11×7 was suggested (I have no idea how to spec these however, so bow to your better judgement). If I went for this would it be a case of experimenting with the prop when I got to that stage? I would however aim for an ESC that handled either 3S or 4S batteries, and from what I understand an ESC for 3S would require higher current ratings (down to the wattage required I guess: W=V x A)
2. ElectricWingman’s calculator suggested the AXi 2820/10 v2 with a 10.5×5 prop, Skywalker 40A ESC with 3s Battery. £75.00 seems quite high but maybe this is the norm for a motor? A big difference between this and the Turnigy.
3. And then the Ripmax… stocks seem to be quite patchy from what I saw.

Does this reasoning seem about right or are there areas I’m way off the mark on?

Many thanks again.

G.

Ian,
Excellent information and detail, thank you!

From this I think I should be able to go for the DX8G2 (which leaves plenty of room for my experience to grow – ever the optimist!) , and a couple of 4 or 6 channel receivers for now of the Lemon range you recommend. Telemetry sounds like it could be useful, so I’ll investigate this aspect more.

Thank you once again.

G.

Aaah thanks again Paul. I must admit I thought I also had an RG411 also in my foamy, but more likely I’m mistaken in that case. I’ll check this out but aim to use the RG631 in any case.
Some work to do at my side, but it seems I’m better armed now. Many thanks.

Hi Paul,
I originally thought the servos were from the early 90’s, however on the box a label shows PN 14235 1999.11, so we might assume 1999!

I also took a look to the receiver modules I have that came along with the JR transmitter (aside from the one in my foamy glider).
1 x RG631B (with a connected RA01L),
1 x RG 411B
The 631B has two antenna wires, and one more on the RA01L (whatever this is… telemetry??). The RG411B has no antenna connected.
I shall also need to consider the electric motor and ESC.

All considered, I wonder if it’s even worth bothering with the servos in the kit and I should just go for new ones as you suggested. £10.00 each sounds like it not being worth the risk to keep the old ones.
I shall then consider ebay for the Hitec FM 35MHz set complete.
Any advice on the receivers I have?
… and what about the electric motor and ESC… I had heard there was a recommended site to spec this out? The Glow Engine I have currently is an SC 40A 6.64cc (unused, still in original box), with a 10×6 Prop. I see what you mean by the prices on ebay!

Sorry for so many questions, but I’ve already learnt a lot from you so many thanks for your time.
Graham.