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Nutball

Foam board quick build

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Nigel R10/01/2019 15:48:27
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2440 forum posts
399 photos

Farman 1020?

David Mellor10/01/2019 16:24:13
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1254 forum posts
611 photos
Posted by Nigel R on 10/01/2019 15:37:17:

Of course this steep glide can be of huge benefit if you operate from small fields. Not specifically for this size foamie, but particularly in bigger heavier models.

True..... but then again,under power they are so controllable that they'll slow to a lot less than walking pace and land literally at your feet.

Nigel R10/01/2019 16:42:25
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2440 forum posts
399 photos

Doesn't count - that was at least six feet away! devil

Don Fry10/01/2019 16:56:25
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3248 forum posts
39 photos

Not a fairman, it had a circular wing, with a hole in the middle, like a toroidal magnet, and a fuselage laid between the outer circumference. I still have the magazine, but it's with an ex pupil. Must get it back.

David Mellor10/01/2019 17:14:07
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1254 forum posts
611 photos
Posted by Nigel R on 10/01/2019 16:42:25:

Doesn't count - that was at least six feet away! devil

Ha..... good point!

Roger T10/01/2019 18:06:58
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55 forum posts

Don,

were you thinking of the Lee Richards annular wing?

Image result for Lee Richards Annular Biplane

This is the model in the Science Museum, but there's also the biplane version featured in the 'Those Magnificent Men' film.

RogerT

Edited By Roger T on 10/01/2019 18:08:06

Edited By Roger T on 10/01/2019 18:09:04

Don Fry10/01/2019 18:46:19
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3248 forum posts
39 photos

That's the one. Thank you, it's been bugging me. Mine did a lot of flying, and I just thought of it as doughnut.

David Mellor10/01/2019 19:05:13
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1254 forum posts
611 photos

I made a foamie model of the Lee Richards. It flew OK, but was nothing special.

It did attract a lot of comments, though. Mainly "oh... a flying toilet seat....."

thumb-p1000511.jpg

Fatscoleymo10/01/2019 21:54:52
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242 forum posts
86 photos

That Lee Richards design looks like the 'toilet seat' guitar that Ronnie Woods played on one of The Faces TOTP appearances....maybe Ronnie was an Aeromodeller?...….or....maybe Lee Richards was really Keith Richards and he loaned Ronnie his model?......it's late..I'll get my coat...

Fats..

onetenor11/01/2019 02:50:21
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1884 forum posts

Here is a rectangular one. A flying carpet. built on in the 50 s F/F. Didn't so much glide power off more of a wobbly mushing descent. Like stable flat stall.

onetenor11/01/2019 02:50:21
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1884 forum posts

Here is a rectangular one. A flying carpet. built on in the 50 s F/F. Didn't so much glide power off more of a wobbly mushing descent. Like stable flat stall.

https://outerzone.co.uk/plan_details.asp?ID=3610

Edited By onetenor on 11/01/2019 02:51:01

Roger T11/01/2019 11:45:44
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55 forum posts

Fats,

there was a 'seat of comfort' flown control line at the (Hullavington) NATS unorthodox event around 1966. There was also a pair of ladies' underwear, inflated to an appropriate shape by the use of glass fibre resin, also flown under line control.

As a shy young reclusive aeromodelling 15 year old teenager, I had no idea why it was called 'Ducted Fanny' until some several years later.......

Richard Harris11/01/2019 14:16:04
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1984 forum posts
1821 photos

Nigel,

My kind of modelling, just shows you can have as much fun with the simplest of designs (probably more).

One of my friends from Germany built something that has the same kind feel to it thumbs up Like yours they are fun to fly, though a bit fishy...quite a site to see three Stingrays in the air as wrong as it may be

Rich

iex2012lutznakel-stingrayteam-bylaurentberlivet.jpg

Nigel R12/01/2019 11:13:07
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2440 forum posts
399 photos
Like it Rich!
Nigel R12/01/2019 11:13:57
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2440 forum posts
399 photos

20190112_104749.jpg

Nigel R12/01/2019 11:14:46
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2440 forum posts
399 photos

20190112_104806.jpg

Nigel R12/01/2019 11:15:36
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2440 forum posts
399 photos

Some low tech decoration using permanent marker and several highlighters...

David Mellor12/01/2019 12:27:47
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1254 forum posts
611 photos

 

Nice deco, Nigel.

I couldn't help noticing where you've put the servo, and how long your nose is - well, not your nose, obviously....

Over the years I've built nearly 50 Nutballs - they are that good. The best ones by far have been stiff, light and balanced with the servos forward to reduce the nose length.

 

Here's my current pair of 28" Nutballs. The one on the right is solid laminated depron, the one on the left is hollowed depron core with 3mm depron skins, making it not only lighter, but stiffer. The servos are as far forward as possible. The carbon U/C is stitched to the motor mount. The pushrods are 1.5m carbon rod running in zip-tie guides to reduce flexing.

p1000933.jpg

 

You can see through the 3mm depron skins to the 5mm depron core. The push-rod zip-tie guides pass through the solid bit in the middle. I use 0.5mm carbon strip as opposing spar caps and a 1.5mm carbon rod tail brace.

p1000932.jpg

 

Here's a close up of the zip-tie guides, secured with a blob of cool-melt hot glue.

p1010772.jpg

 

For the spline I use a carbon tube stitched and cyanoed to 1/64" ply plates UHU'ed to the depron skin over the inner depron core spine.

p1010773.jpg

 

Some will say its a lot of work..... but the performance is astonishing.

 

Edited By David Mellor on 12/01/2019 12:29:50

Nigel R12/01/2019 13:00:26
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2440 forum posts
399 photos

Some neat work as always there dave. I like the pushrod guides. Definitely a more involved build but almost anything would be longer than mine!

Servo position in mine was set by the pushrods I had to hand - 12" welding filler rods. I guess I could join two together somehow.

I left the nose section deliberately long so I could get balance easily enough. It has worked ok but I would imagine your method removes jusr a little more structure.

Where do you source the carbon rod?

David Mellor12/01/2019 13:21:49
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1254 forum posts
611 photos

Nigel, I've found over the years that generic "carbon rod" varies a lot in quality, especially if purchased off e-Bay. Some of the worst rods are mostly glass fibre/epoxy with cheap dye added to make the product look black. You cannot tell by looking. Price is no guide to quality either.

 

But you can tell, after you've bought it, what it is made of. When you do that, it will open your eyes as to how much stuff is being passed off as carbon fibre rod.

 

The only way to tell is to weigh them accurately, using a good micro balance and calculate the density.

 

Ironically micro balances are very good, plentiful and very cheap (around £15) on e-Bay..... something to do with illegal substances, I'm told.

 

I always buy proper quality carbon fibre products from here: **LINK**

 

Their prices may look high, but the quality is second to none and the service is excellent. I have no connection to Easycomposites beyond being a satisfied customer.

 

Dave

Edited By David Mellor on 12/01/2019 13:22:35

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