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 Post subject: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 8:53 am 
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Joined: Fri Nov 29, 2013 4:38 pm
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Location: Manchester UK
Hey all

I have been listening to your show in the UK for about six months now, really enjoy it as it doesnt focus on any one particular aspect of the hobby.

Thought i would share my latest project as its a little bit different, well for me any way.

Its a bicopter, so two motors and two servos that revolve the motor arms. The one that i have is from a company called ST Products.

http://www.infinity-hobby.com/main/product_info.php?products_id=9488

Frame is a bit pricey but is top quality, 500mm long and 500mm across the arms. Frame went together in about 10mins. I have decided not to cheep out on servos and have gone for some mini metal gear hitec ones. I have an old KK2.0 lying around so that should slot straight in and supports bicopters. Motors are 1200 kv rc timer ones with rctimer simonk flashed esc's. It seems to be designed to work with 3 blade 9 x 6 props but i have a couple of 10 x 5 carbon ones so will try them first.

Will let you know how i get on but it is really different to all the other models i own !

Cheers

Ant


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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 9:06 am 
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Joined: Wed Jul 27, 2011 8:13 am
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Location: Caldwell, TX
I wish I would not have looked at this post...seems it has entered my want list. :face

Can't wait to hear the flight reports.

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 10:06 am 
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Joined: Mon Jul 25, 2011 5:07 pm
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Location: West sussex, UK
that is too cool.


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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 10:38 am 
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Joined: Mon Jul 25, 2011 11:58 am
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Location: Austin, TX
Ant, that is wicked cool! It's like the flying machines from Avatar. :thumbup:
Oh, and welcome to the forum. :)

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 1:06 pm 
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Joined: Thu Aug 11, 2011 12:46 pm
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Location: McKinney, TX
I've wanted to do a bicopter for a while now. I'll be watching this one as it looks nice!

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 1:17 pm 
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Location: Austin, TX
I'm already wondering if a collective pitch bicopter would be possible. LOL

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 3:40 pm 
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JustPlaneChris wrote:
Ant, that is wicked cool! It's like the flying machines from Avatar. :thumbup:
Oh, and welcome to the forum. :)


That was done a while ago by the same mind that have us the full scale v-22 osprey.

He made a v-22 kit that ran 325mm blades and used his own stability controller. It was basically a gain adjusting device for the 4 or 5 tail gyros you had to install on the craft. The gains for each gyro would change depending on what stage of transitional flight you were in.

Sent from my SM-N900W8 using Tapatalk

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 3:42 pm 
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Here it is: http://www.rotormast.com/rm/index.php?p ... Itemid=194

I knew it was in my bookmarks somewhere.

Correction on the number of gyros... He uses 3

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 Post subject: Re: ST Products Bicopter
PostPosted: Thu Feb 13, 2014 5:21 pm 
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Location: McKinney, TX
Tom Mast has worked as an engineer for Bell Helicopter. I got to see his V-22 model prototype at SRC one year. At that time, he only had collective pitch on the rotors. I think the current design has cyclic too.

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Team Shannon (Only Fine Helis)
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 Post subject: Re: ST Products Bicopter
PostPosted: Fri Feb 14, 2014 7:14 am 
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Joined: Fri Nov 29, 2013 4:38 pm
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Location: Manchester UK
Hey guys - thanks for the interest and welcome to the forum - appreciate it. Especially as since listening to the show you have 'enabled' me to buy a 3dhs 72" extra and an rc factory edge 'red hot' !!


Any way, did some more work on the bicopter and have come up with a few challenges !

No 1 - the servo screws won't bite into the frame if that makes sense. My solution was to cut down some old servo horns and use the as backing plates.
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