The NutBall, best damn RET foamy yet..... - Page 1090 - RC Groups
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Jun 08, 2018, 04:59 PM
Registered User
Quote:
Originally Posted by davereap
The laminating pouches /films are the best as they dont stretch.. anything that will stretch is no good for stiffening..
Thanks again Dave, good point and I don't want the covering to shrink either because of bowing. I found an EBay supplier of pouches which are either 80 or 100 micron thick (it's not stated clearly which one it is). So far, I cannot find a supplier of rolls of laminate, which would be better for my purpose.
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Jun 09, 2018, 12:47 AM
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davereap's Avatar
I use the ebay pouches ..
https://www.ebay.co.uk/itm/Royal-Sov...19.m1438.l2649
I use what ever is the cheapest.. and dont worry about overlapping the pouches, overlaps dont show and the doubled layer is extra tough.

NOTE..The film does cool and shrink slightly after ironing, but once both sides of the foam are covered the part can be re-ironed flat, the film on both sides act to cancel each other out, any bowing will go..

Rolls of laminate are too expensive.. and an A3 box of 100 lasts a long time..

how tough??? see my videos here , poor launching caused a lot of crashing on a fast depron delta.. some hard hits with zero damage..

https://www.rcgroups.com/forums/show...tz-speed-delta
Last edited by davereap; Jun 10, 2018 at 11:32 PM.
Jun 10, 2018, 11:59 PM
Registered User
Quote:
Originally Posted by davereap
how tough??? see my videos here , poor launching caused a lot of crashing on a fast depron delta.. some hard hits with zero damage..

https://www.rcgroups.com/forums/show...tz-speed-delta
Just wondering Dave how you finished your delta? Solar film or something similar ironed on over the laminate? Surely not paint.

By the way, I also built a delta from an RCM&E plan, not the same one as yours, with an all up weight of 105 grams.
Jun 12, 2018, 02:09 AM
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davereap's Avatar
2" wide coloured sticky tape... from staples in the UK.. sticks well to the laminate

If you like deltas try this one....
https://www.rcgroups.com/forums/show...r-EPP-3D-Delta
Jun 12, 2018, 04:32 AM
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PaulB's Avatar
I recently did some messing around with my cheap airbrush and laminating pouches.

I have a couple of types of acrylic paint which I use for spraying straight onto Depron, stuff that artists use in tubes which I thin down with water and small cans from a DIY store which I use straight or thin with a drop of meths if required.

The cheap artists type stuff flakes off of laminating pouches just by rubbing with a finger and really is unusable but the stuff from a DIY store stuck surprisingly well and you could flex the sheet and rub it with a finger nail with no signs of lifting. I even shot some clear PU lacquer over a piece and that was really tough.

However, I just use the tape from HobbyKing, cheap as chips and sticks like to a blanket. Colours cover well and black is that 'solid' that I can cover up the printing on the Corroplast sheets (old election boards)with it.

https://hobbyking.com/en_us/wing-tap...wide-blue.html

For 'decals' just stick the tape onto standard kitchen baking paper and use scissors or a scalpel to cut the shape before peeling the baking paper backing off, works a treat.

Paul
Jun 12, 2018, 04:36 AM
Registered User
Quote:
Originally Posted by davereap
2" wide coloured sticky tape... from staples in the UK.. sticks well to the laminate

If you like deltas try this one....
https://www.rcgroups.com/forums/show...r-EPP-3D-Delta
The checkerboard strip must be some sort self-adhesive decal I suppose.

I do like that delta Dave and I would like to be able to pilot it as well as the fellow in the video. I've saved the link for a future project.
Jun 12, 2018, 04:54 AM
Registered User
Quote:
Originally Posted by PaulB
For 'decals' just stick the tape onto standard kitchen baking paper and use scissors or a scalpel to cut the shape before peeling the baking paper backing off, works a treat.
Paul
Thanks for the tip Paul. I bought some coloured tape from Banggood recently. I'll see if I can come with something worthwhile.
Jun 21, 2018, 03:37 PM
Flying one day at a time....
pardshaw's Avatar
I think it is about that time of year again...... time to build a big Nutball, and do some experiments.


Five feet sounds about right.


Let me see what bits and pieces I've got gathering dust..........
Jun 21, 2018, 03:41 PM
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PaulB's Avatar
Quote:
Originally Posted by pardshaw
I think it is about that time of year again...... time to build a big Nutball, and do some experiments.


Five feet sounds about right.


Let me see what bits and pieces I've got gathering dust..........

YAWN

Five foot, didn't you do that a couple of years ago????


Man up, not seen an 8' er yet..................
Jun 21, 2018, 03:46 PM
Lost at LAX
Old Fart's Avatar
Quote:
Originally Posted by PaulB
YAWN

Five foot, didn't you do that a couple of years ago????


Man up, not seen an 8' er yet..................
Was looking at the 1-1/2" thick insulation board at Lowe's the other day thinking "what could be made from this"
Jun 21, 2018, 03:47 PM
Flying one day at a time....
pardshaw's Avatar
OK.....


Made it!


60" inch diameter.


All up flying weight is 100 ounces, giving an extraordinary low cubic wing loading of 1.15 OPCF. Power comes from a Turnigy Aerodrive 4250 500kv motor, drawing 1.3 kiloWatts through a 60A ESC from a pair of 3S 2200 mAh lipos in series. Measured static thrust is 160 ounces.
Jun 21, 2018, 03:50 PM
Flying one day at a time....
pardshaw's Avatar
Quote:
Originally Posted by PaulB
YAWN

Five foot, didn't you do that a couple of years ago????


Man up, not seen an 8' er yet..................



Ah..... I'm getting there.


And, no. A couple of years ago I made some 4 footers. Turns out that 5 footers pose some new and interesting problems. Got to understand and solve those before going over 6 feet.


This little tiddler is just to test out one idea. I'll explain what I've discovered shortly.


Meanwhile, here's a little clip of its first flight.

60" Nutball - maiden flight (2 min 30 sec)
Jun 21, 2018, 09:35 PM
flyin' fool
goldguy's Avatar
Nutty goodness. Keep up the insanity!
Jun 22, 2018, 04:13 AM
Flying one day at a time....
pardshaw's Avatar
Nothing flies like a big Nutball.


This one weighs six and a quarter pounds and just defies gravity. Its a delight.


It uses very little power to keep aloft. It does require a few pounds of thrust (ten are available) to drag itself through the foot high weeds and ruts to get airborne. Once in the air it becomes a beautiful thing.
Jun 22, 2018, 04:21 AM
Flying one day at a time....
pardshaw's Avatar
But there are some issues..... five foot Nutballs are significantly harder to get right than 4 foot Nutballs.

There are, I think, just two basic problems with these larger ones:-

(1) Weight distribution

(2) Control surface authority


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