1/4 scale Chris Williams Fournier RF-5b

Let us all watch your new project progress.
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itekiefte
Posts: 4
Joined: 18 Mar 2015, 10:14

1/4 scale Chris Williams Fournier RF-5b

Post by itekiefte » 06 Apr 2015, 23:07

I'll continue where I left off in my last post on the old forum.

After weeks of high winds and bad weather, I finally finished the Fournier and she made her maiden flight yesterday morning.

Although not the best quality, a clubmate was there to film it on his phone:
https://youtu.be/WcKLt09mx8A
IMG_2933.JPG
IMG_2937.JPG
IMG_2939.JPG
Many thanks to Chris Williams and Barry Cole for their help.

Ivo te Kiefte

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chris williams
Posts: 1011
Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: 1/4 scale Chris Williams Fournier RF-5b

Post by chris williams » 06 Apr 2015, 23:42

Congratulations IVO...!

itekiefte
Posts: 4
Joined: 18 Mar 2015, 10:14

Re: 1/4 scale Chris Williams Fournier RF-5b

Post by itekiefte » 06 May 2015, 13:51

Hi,

I have enjoyed some 20 flights now on the Fournier since her maiden. Although she had some "tail waggling tendencies" the first couple of flights, this was easily remedied with an extra 200g of plumbum, neatly hidden under the motor box.

Last saturday however she was a lot less keen on gaining height after take off and my Taranis Tx was quick to inform me about plunging lipo voltage readings. So a premature atterage was initiated.

Not a moment too soon it turned out; there was a funny smell coming from behind the prop and I could hardly turn the prop by hand anymore as the motor had all but seized up.

It seems I had fallen subject to the phenomena Chris Williams has described earlier in Q&EF magazine:
"Moving Motor Magnet Syndrome".
IMG_2960.jpg
Anybody have good advice as to what epoxy make would be best to re-fix the magnets?
It needs to be heat resistant to some extend at least.

grtz,
Ivo

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Barry_Cole
Posts: 1296
Joined: 10 Mar 2015, 09:30
Location: Hampshire UK

Re: 1/4 scale Chris Williams Fournier RF-5b

Post by Barry_Cole » 06 May 2015, 16:05

I would return the motor and ask for a new one...

BC

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