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Help - 48 inch Fairey Huntsman 31

Brushless Motor

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Dave Milbourn12/08/2019 10:29:35
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4025 forum posts
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The prototype Modav H31 46" model had an HP 61 F R/C glowplug motor. This was about the most powerful 10cc glow engine on the market at the time and claimed an output of about 1.2BHP - or around 900W. Its performance was impressive and scale-like.

The Turnigy G60 claims a maximum power output of 1500 W (2 BHP) so it will be more than powerful enough on a 6S LiPo pack. The motor costs around £50. If your friend is already familiar with brushless motors and LiPo batteries then the technology will hold no mysteries for him.

Acording to MFA's own data the 850 puts out 80W of power at maximum efficiency and cost around £30. It's also noisy and current-hungry.

I think those figures say it all.

I have seen examples of this model powered by an 850 motor and even without a stupidly-heavy SLA battery they perform like canal narrowboats. As the bloke who designed the Huntsman kit back in 1972, watching such a travesty makes me very sad.

Dave M

Dave Milbourn12/08/2019 11:10:39
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4025 forum posts
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Just for those who haven't seen a Huntsman 31 travelling at 'an approriate speed', here's a video of my little 1/16 scale one, taken by Martin Davis at Wicksteed Park a few years ago. The choice of music was his! Huntsman 31 at Wicksteed Park

The motor is a brushless Turnigy 28mm one running on a 3S LiPo.

Dave M

 

Edited By Dave Milbourn on 12/08/2019 11:12:08

Former Member12/08/2019 19:59:46

[This posting has been removed]

Colin Bishop12/08/2019 22:10:32
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I'm building the SLEC Swordsman at the moment and thoroughly enjoying it.

Love working with the wood construction. The bits fit together nicely but there is still some satisfying shaping to do and I will hopefully end up with a near scale model as a stablemate to my earlier Huntsman.

Colin

swordsman.jpg

Edited By Colin Bishop on 12/08/2019 22:16:51

Dave Milbourn12/08/2019 22:42:41
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4025 forum posts
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small pic 01.jpg

I'm only too happy to keep bringing Faireys to the masses! smiley

DM

Former Member13/08/2019 07:31:58

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Dave Milbourn13/08/2019 08:32:44
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4025 forum posts
282 photos

I would definitely NOT recommend any type of 'plastic + brass insert' universal joint as a coupling. They aren't strong enough to transmit that amount of power. I would strongly suggest he approaches SHG and has them make a BA-threaded version of their marine rubber flexi coupling (Page 20 of their catalogue). They aren't cheap but they do the job more than adequately. I now use them exclusively. SHG Catalogue

Dave M

Former Member13/08/2019 09:38:47

[This posting has been removed]

Former Member13/08/2019 09:48:59

[This posting has been removed]

Dave Milbourn13/08/2019 10:53:39
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4025 forum posts
282 photos

Cap'n

Tell him that the prices in the catalogue were current 6 years ago and they've gone up a wee bit since then. He'd best telephone SHG as they are notoriously old-fashioned and tend to leave E-Mails at the bottom of the to-do list!

I'd guess he'll need a plain 6mm-to-2BA threaded coupling, but best double-check that last dimension.

DM

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