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by Andy Boylett
May 13th, 2013, 10:15 pm
Forum: 2.4 Ghz and Large Models
Topic: FPV Interference on 2.4Ghz
Replies: 46
Views: 26246

Re: FPV Interference on 2.4Ghz

At last years Elvington, DSM2 models were dropping left right and centre. We thought it was to do with the large aerial at the airfield occasionally transmitting at high amplitude and knocking out our signals if we were unlucky. It hit me twice and hit others using DSM2. Any model on DSMX or other ...
by Andy Boylett
October 19th, 2012, 9:57 pm
Forum: Technical Help required
Topic: ali' spinner backplate needed
Replies: 1
Views: 1219

Re: ali' spinner backplate needed

Stewart, When Phil Clark was the inspector for my Spacewalker I machined up a back-plate for one of his FW190 models. I also had a 190 kit so I made up 2 of them at the same time. Some photos of the one for Phil are below. The one I made for me has machined rings around the 'spacer'. I have sold my ...
by Andy Boylett
October 18th, 2012, 9:54 am
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

Looks to me like you need for each side:
one small wife approx 86lbs
a child of approx 38lbs
a small dog approx 9lbs
and the cat, approx 2lbs

Then see if you can get them to sit still. You have an issue with the cat sat next to the dog. At leats if the wing fails the cat is on top this time :D .
by Andy Boylett
October 17th, 2012, 9:38 am
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

Thanks Simon. It's 25 years since I did any of those sums and since university I have only really used the structural stuff and not aerodynamics! Your explanations brings back memories of horribly complicated equations :( :( . I like your idea that to get back to a 'sail' position in a vertical dive...
by Andy Boylett
October 16th, 2012, 9:58 pm
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

That is a maximum worst case scenario where the wing is taken from Vmax to Cl max in an instant witout reducing velocity. Simon, Your whole explanation is very nicely put. The only thing I would add is the non-aerodynamic event that my son conjured up when he snapped the wings off one of our planes...
by Andy Boylett
October 16th, 2012, 5:58 pm
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

It was just a thought! Didnt realise it would be such a long winded awnser. Wouldnt the G be different though along the wing span? Bonzey Hi, The g force is the same all along the wing as this the acceleration of the wing....it all accelerates at the same amount. The force (or weight) that is felt ...
by Andy Boylett
October 16th, 2012, 10:31 am
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

Thanks Andy. Now could you supply an idiots guide plz! Ken. But that was the easier guide. I have put below this message the full differential calc for centripetal acceleration, although it is 25 years since I last tried to use that :) :) :) :) The easiest way is just is just to estimate g from you...
by Andy Boylett
October 10th, 2012, 10:40 pm
Forum: Technical Help required
Topic: How do you measure G?
Replies: 36
Views: 6837

Re: How do you measure G?

Ken, There are a number of commercial g force sensors you can buy now-a-days. They directly measure the g force experienced and can either log it for download when you land or some will transmit it back to a screen as you fly. There are some cheap ones on HobbyKing and better quality ones elsewhere....
by Andy Boylett
October 1st, 2012, 5:13 pm
Forum: Technical Help required
Topic: Spektrum DX18 SD card programming.
Replies: 4
Views: 2195

Re: Spektrum DX18 SD card programming.

I bought Sam one of these as payment for supervising/errecting all the scaffold on my self-build house. He hasn't bothered with the updates yet! Thanks guys. I will point him towards this thread.
by Andy Boylett
September 24th, 2012, 10:47 pm
Forum: Technical Help required
Topic: Tapered exhaust ducts
Replies: 4
Views: 1825

Re: Tapered exhaust ducts

Hi, I have a sabre that I have converted to EDF. Pretty much the whole of the inside of the fus is now a duct. I had to cut down each fus former until there was only a 5mm hoop left of each one!. The batteries are located in the cockpit and the mini servos lie flat on their sides set into the fus wa...
by Andy Boylett
August 29th, 2012, 9:38 pm
Forum: Technical Help required
Topic: Large model transport
Replies: 6
Views: 2308

Re: Large model transport

Caravan + awning. When you arrive assemble awning and empty model parts out of van into awning - so you can get in!
by Andy Boylett
August 22nd, 2012, 10:16 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

We finally managed to get all the peices across our building site and took the Spacewalker to Elvington. We assembled it at the show and this was the first time all the electronics had been together. Sam spent some time setting everything up and then we managed to do some taxiing tests. Here are our...
by Andy Boylett
August 9th, 2012, 11:58 am
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Hi Ted, You are absolutely right of course. We have not really completed the plane and there is no interior, screens, dummy engines etc. We have been trying to get it in a "rolling" taxiable state because we have Channel 4 TV comming to film us at Elvington. I am doing a self-build house a...
by Andy Boylett
August 8th, 2012, 8:27 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Latest build pictures... Sam has completed all the servo installations and the linkages. There are 4 servos here, 2 driving each elevator half. Each pair runs on a different receiver. All the linkaged solid ally clevisess use M3 rod end ball joints and machine..... IMG_3760small.JPG This is how he h...
by Andy Boylett
August 8th, 2012, 9:26 am
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Excellent. They told me they were aiming to arrive about 10.00am. Will you have the Vulcan I have told them all about? Cheers, Andy
by Andy Boylett
August 7th, 2012, 12:23 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Cowl nearly done......
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The access door is because we have half the flight batteries stored in a compartment underneath the motor. It also provides good access to the speed controller switches....

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IMG_3755small.JPG (29.68 KiB) Viewed 4842 times
by Andy Boylett
August 5th, 2012, 10:23 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Sam and myself have now split tasks to get the plane finished for Elvington. Sam is fitting all the servos and linkages and I am doing the cowl, prop, spinner and other bits. Here's Sam trying to work out how to get 4 servos into there to control the elevators..... IMG_3748small.JPG I have been cont...
by Andy Boylett
August 2nd, 2012, 7:06 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Well Sam and me started building again today! My finger is better and we decided to ignore the other project in our back garden and get on with the Spacewalker. We are intending to bring the model to Elvington, although it won't be able to fly. Here is a photo of our other project, still all under g...
by Andy Boylett
July 7th, 2012, 9:44 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

Building update: I am still not doing any. When that pin in my finger (photo posted previously) was removed, it broke the end of my finger off again. Two weeks later I was taken back in to have a Titanium screw fitted inside my finger - although the titanium was an awful lot samller than that stuff ...
by Andy Boylett
May 15th, 2012, 6:30 pm
Forum: Your New Projects
Topic: Spacewalker half scale 168" electric
Replies: 395
Views: 119382

Re: Spacewalker half scale 168" electric

chris willis wrote:Mike its ok its his hand :lol: :lol:


If it was anything else I might be able to fly still :(

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