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Members => Build Threads => Topic started by: rob.thomson on March 21, 2014, 10:19:39 AM

Title: Robs Mini Zephyr
Post by: rob.thomson on March 21, 2014, 10:19:39 AM
(http://img.tapatalk.com/d/14/03/21/abejy2em.jpg)

Started work on my mini zephyr.

It will have a

200mw tx,
suppo  osd
Skylark art
Mini camera
Frsky RX

Rob

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Title: Re: Robs Mini Zephyr
Post by: rob.thomson on March 21, 2014, 11:16:23 AM
(http://img.tapatalk.com/d/14/03/21/na3yny9e.jpg)

Receiver, servos and each installed.

Just waiting for the OSD to turn up in the post so I can get those bits sorted!

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Title: Re: Robs Mini Zephyr
Post by: stevec on March 21, 2014, 12:32:44 PM
I hope you have a big battery!
I had to cut the nose off and move it forward about an inch and a half from flush to get CG in the ball park.
I also took the opportunity to put in a g4 floor to the battery bay so a 2200 fits now.

I hope to maiden mine soon.
(http://img.tapatalk.com/d/14/03/21/ysaruru7.jpg)(http://img.tapatalk.com/d/14/03/21/yte2ydan.jpg)


good luck.
Steve
Title: Re: Robs Mini Zephyr
Post by: rob.thomson on March 21, 2014, 01:40:45 PM
Mine balances OK :)

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Title: Re: Robs Mini Zephyr
Post by: skyscraper on March 21, 2014, 02:55:15 PM
Interesting difference in motor size between the two planes  :)

Looking good Rob!

EDIT: Have to say that the large ally motor mount seesm like overkill. The FlyingWings Falcon just uses a chunk of foam and a piece of ply. Cheaper, lighter and more crashproff.  (The only posssible plus for all is that the ally may act as a heatsink so you can run a few more amps, but I would argue just get a bigger motor will work better)

regards
Andy
Title: Re: Robs Mini Zephyr
Post by: rob.thomson on March 21, 2014, 03:29:07 PM
I am using the motor from an old HK rad jet.

Light, and very powerful. In ground tests, I should go vertical.

(http://img.tapatalk.com/d/14/03/21/dybahame.jpg)

(http://img.tapatalk.com/d/14/03/21/suvanese.jpg)


You can see in the above pictures - the 2200mah battery works OK.

I had to cut the foam well out, and put a 1mm ply floor in.


(http://img.tapatalk.com/d/14/03/21/7y7eje5e.jpg)

Got the flappy bits on this one.  So next is to put some colour on, and get the odd in.

Can anyone confirm the exact cog for me?

I currently balance about 10mm in front of the rear spar.  Just inside the back press formed well.

Andy... Your model inspired me to make this one. :)

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Title: Re: Robs Mini Zephyr
Post by: rob.thomson on March 21, 2014, 05:47:50 PM
(http://img.tapatalk.com/d/14/03/22/a6yru8y9.jpg)

Done.

Not bad for a days effort :)

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Title: Re: Robs Mini Zephyr
Post by: Brod on March 21, 2014, 06:02:43 PM
like it,good size,looks tough :)
Title: Re: Robs Mini Zephyr
Post by: skyscraper on March 21, 2014, 06:23:11 PM
Wow! That is impressively Fast building! Looking forward to seeing it in action!

regards
Andy
Title: Re: Robs Mini Zephyr
Post by: stevec on March 21, 2014, 10:48:14 PM
cool.

the motor on mine is from a funjet that I bought of a bloke in the flying club, he'd built it to do over 100mph I don't think it was that fast but it did move along nicely, I figured as a funjet is about the same size I'd stick it on. looking at the other motors, perhaps that was why I needed a long nose job on mine...

Looking forward to the flight report.

/Steve
Title: Re: Robs Mini Zephyr
Post by: rob.thomson on March 22, 2014, 05:34:42 PM
First flight done.

Only a quick los flight to check things are OK.

The good news.  It goes vertical!

The bad news.

I stripped an servo.  So need to extract and hook up a replacement.

My cog was slightly too rearward.  It made things very unstable.  I gave now added 10g lead up front - so that should do the trick.  Next flight will be in a few days :)

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