Wittman Tailwind

[Frazer Simpson]

On the wing drawing it shows an arrow pionting to the paper tube, it says read text. I can't see any text relating to this tube. Can you please tell me what it says and do you have to make this tube or can it be purchased.

thanks Frazer

[Pete B]

The paper tube is there to allow easy passage of the servo wiring, Frazer. Just roll a strip of A4 (or longer if needed) into a tube (a couple of turns will do), roll it until it is tight enough to go through the holes in the ribs, insert it and release.

It will expand to form a tube, which makes life much easier. Have you seen the build pics by Peter Miller here?

Pete

[Peter Miller]

I roll my paper round a 1/4" dowel and then release it in the hole. Apply glue at the ribs to hold in place.

[Stephen Ward 5]

I'm Doing my own Build of the wittman tailwind but im not sure what sort of setup i wouled need for an elctric model so couled someone give me a guidline for the motor esc and battery specs?

[Peter Miller]

Well, I can't, that is for sure!

[Caveman]

Stephen,

For a Wittman Tailwind build log and electrification discussion,

look here

Cheers GDB

[Stephen Ward 5]

Caveman

Ivr looked yhrough the whole article (whilst my cat had my legs pinnied down in a verry uncomfertuble position)
But it onlu givrs the spec for the battery (33mah i think) but not the likes of what amount of kv the motor needs and the ampage of the motor,

[Stephen Ward 5]

sorry for my spelling

[Caveman]

Stephen,

The Tailwind is suitable for an IC motor of 0.20 to 0.25 cu.in

I reckon that a 0.46 IC engine equates roughly to 750W. On that basis the Tailwind should be quite happy with 400W.

As a rule of thumb for each pound weight, 100W will give a good performance. Peter Miller states the weight of the Tailwind as 66oz. = 4.125 lb. At 100W/lb this gives 412W.

So whichever way I come back to 400W being about right.

Now, I have built Lindsay Todd' Zulu ET which is also 48" wingspan. The motor I have used is the Emax BL 2815/09 with a 40A ESC driving an 11x7 APCe prop. The battery is 2200mAh 20C 3S.

For the motor/ESC look here.

This is just one possibility, others may have alternative suggestions.

Hope that helps, GDB

[Stephen Ward 5]

Thanks that clears things up just have to wait to my birthday untill i can get my next batch of stuf