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Old Sep 11, 2010, 03:35 AM
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Tomboy 48"

I'm just starting a Tomboy 48" build, and as it will be electric powered (outrunner & LiPo's) would be very interested in any experience/thoughts on motor/prop/Lipo sizing.

The original as designed by old Boddo used a Mills 1.3

Regards
Chris
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Old Sep 11, 2010, 03:40 AM
Scott R/C Time Pilot
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NorthBend/Coos Bay,Oregon USA
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A speed 400 size outrunner and a 2s or 3s 1000mah to 1500mah lipo and 10-6 prop

Scott
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Old Sep 11, 2010, 03:43 AM
Scott R/C Time Pilot
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Is this going to be a long wing stock version or is the whole plane going to be bigger?
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Old Sep 11, 2010, 05:41 AM
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Quote:
Originally Posted by orange&white View Post
Is this going to be a long wing stock version or is the whole plane going to be bigger?

Hi Scott...the whole airframe is bigger...36 inch version scaled up by 1.3


(Anyone electrified a 48" ?)
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Old Sep 12, 2010, 02:06 PM
Who let the dogs out?
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Pontefract, Yorkshire, UK
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I'm just fitting mine out, I was planning on a plain Blue Wonder 1300 on 2S and a 10x4 slowfly, or 3S and a 8x4SF... but that was before I realised how heavy it is!
The Tomboy is standard upscaled to 48" and when fully fitted out, will be getting on for 22oz - much more than I expected. The BW runs 75w comfortably, so at 50w/pound and as I'm looking for graceful flight not verticals I'm hoping it will be ok. The BW does look tiny in the engine bay...
Meanwhile I'm watching the thread to see what others think...
Cheers
Phil
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Old Sep 13, 2010, 12:06 AM
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Interesting, Phil. Thanks.

I was thinking about an AXI 2212/26 with a 10x5, and a Jetti 18A BEC on 3s.

Chris
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Old Sep 13, 2010, 02:26 AM
Scott R/C Time Pilot
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NorthBend/Coos Bay,Oregon USA
Joined Dec 2009
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This would be perfect

http://www.hobbyking.com/hobbyking/s...idProduct=8622

Ax 2210-1000 42-gram 13T Delta Stock (26g)
Kv = 1019 Io = 0.85 Rm = 0.138

GWS 10-6 *D prop
Rhino 750mah 3S battery
7862 rpm @ 10.85volts/13.39 amps
Badcock: 790 grams 27.9 oz thrust
Drive Calc: 891 grams 31.4 oz thrust and 78 Efficient

I have one on a 21oz plane, it rules.

Scott
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Old Sep 13, 2010, 03:19 AM
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Thanks Scott.

Phil, with this weight (22 oz) did you build as per plan using 1/4" sq...or were you temped to lighten ?

(I'll be covering with tissue over 0.5 micron mylar)

Cheers
Chris
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Old Sep 13, 2010, 03:24 AM
Scott R/C Time Pilot
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NorthBend/Coos Bay,Oregon USA
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Hi Chris, My Tomboy is done, maiden tomorrow.
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Old Sep 13, 2010, 07:28 AM
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Quote:
Originally Posted by orange&white View Post
Hi Chris, My Tomboy is done, maiden tomorrow.
Great....I'd recommend a hand launch.
Good luck !


Chris
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Old Sep 13, 2010, 07:34 AM
Sic itur ad Astra
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United Arab Emirates, Abu Dhabi, Abu Dhabi
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Quote:
Originally Posted by phil_g View Post
I'm just fitting mine out, I was planning on a plain Blue Wonder 1300 on 2S and a 10x4 slowfly, or 3S and a 8x4SF... but that was before I realised how heavy it is!
The Tomboy is standard upscaled to 48" and when fully fitted out, will be getting on for 22oz - much more than I expected. The BW runs 75w comfortably, so at 50w/pound and as I'm looking for graceful flight not verticals I'm hoping it will be ok. The BW does look tiny in the engine bay...
Meanwhile I'm watching the thread to see what others think...
Cheers
Phil
Hey Phil,
I'm a great believer in the BW, I use one in a 17oz Cessna to good effect. Enough power with an 800mah 2s, enough for tricks with a 3s, both with an 8x6 prop from memory. 22oz is going to be stretching it a tad, but, I never cease to be amazed what the BW can do so maybe it will be fine for 'scale' flying.
sparks
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Old Sep 13, 2010, 08:17 AM
Who let the dogs out?
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Pontefract, Yorkshire, UK
Joined Jul 2007
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Well, I confess I didnt build it - I built some radio equipment for a pal, who in return built me theTomboy. And a lovely job he did too!
I do like the BW's, I have a few in regular use, but this will be the largest/heaviest... we shall see. My single channel gear gives full or zero throttle so I dont want it overpowered. Time will tell...
Cheers
Phil
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Old Sep 13, 2010, 04:20 PM
Sic itur ad Astra
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United Arab Emirates, Abu Dhabi, Abu Dhabi
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looking forward to reading the flight report, and seeing the video if you can arrange it Phil
sparks
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Old Sep 13, 2010, 05:11 PM
Who let the dogs out?
phil_g's Avatar
Pontefract, Yorkshire, UK
Joined Jul 2007
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Yep I'll get my lad to video it, it will be my first S/C bang-bang model since the 60's I'll put a photo in the Tomboy photo thread.
Cheers
Phil
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Old Dec 26, 2010, 12:29 PM
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Hi guys, I've building a Tomboy 36" and a senior 48" I want them both to be lecky, can anybody help me choose a cheap motor on ebay for both please?

I have lipos and esc, just need to order some motors.


Thanks

Chris
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