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Old Apr 07, 2012, 03:58 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
United States, MI, Manchester
Joined May 2004
3,023 Posts
ouch dude.
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Old Apr 08, 2012, 01:20 AM
scratch build everything
DudleyLeRoux's Avatar
South Africa, KwaZulu-Natal, Botha's Hill
Joined Aug 2009
1,219 Posts
I've had heaps of fun with her. This time i was was trying to squeeze just 1 more roll before pulling out. Can't bake a cake without cracking some eggs

Mould polished and painted, will layup a new fuse today
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Old Apr 08, 2012, 03:01 AM
Stirring the pot
johannlochner's Avatar
Port Elizabeth South Africa
Joined Jun 2008
4,013 Posts
Quote:
Originally Posted by DudleyLeRoux View Post

Mould polished and painted, will layup a new fuse today
How are you finding painting on the Frecote?
J
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Old Apr 08, 2012, 04:27 AM
scratch build everything
DudleyLeRoux's Avatar
South Africa, KwaZulu-Natal, Botha's Hill
Joined Aug 2009
1,219 Posts
Quote:
Originally Posted by johannlochner View Post
How are you finding painting on the Frecote?
J
A little more challenging, but learning to use a very light initial coat, seems to help a lot.
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Old Apr 29, 2012, 05:59 PM
Gravity = Enemy
Simon R's Avatar
Australia, New South Wales, Wollongong
Joined Jan 2011
40 Posts
Oh my...
I have been busy.


I built a VAC pump. Its awesome.
I also bought some building products from the States, and From South Australia.
I also have been watching and reading some serious amount of threads about bagging.
So I tried bagging a tail plane to see how it would go, and what I would have to change.

Seems everybody has their own way of doing things, with small changes to suit their needs. So I will be taking a bit of everybody's styles, and rolling them up into mine. I have made some huge mistakes so far, but Im sure Im not the first.

The new VAC pump is awesome. Im new to this VAC bagging thing, and Now Im talking to my brother about making a Sally FUZ mold!
This thing is awesome.... I have to finish it, by putting the electrics in a box.
I can adjust the vacuum from 2 to 30 hg. (Not when it running ).
It will show me how many cycles it has done, and also accounts for the 1 minute inhibit on the pump start after a run cycle.


I had a crack at some tails for the sally, and I eventually got a good one.

So then I thought I would give a wing a go.....
It came out awesome.....

The wing weighs 65 grams.
Its covered in 76 gsm glass with a 100 gsm CF leading edge.
The kevlar hinge material is too heavy I think.
It had a small stick up at one corner.... Dont really know what happened there.
The pump maintains 16 - 19 hg all the time. It cycled 11 times in 21 hours.

I am so stoked with how the wing came out. Feels pretty stiff too.

Ill let it harden for another week, then start working on it again.
(I forgot to cut the servo wire holes to the centre of the wing before I glued the halves together.)


One question..... What Kevlar should I be using for the hinge material.
Should it be tape, how wide?
What weight should it be?
or should I cut some strips of the 76gsm aramid fabric I have.?
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Old Apr 29, 2012, 06:22 PM
Building with TLAR precision
Zenmaniac's Avatar
near Madison, WI
Joined Jan 2009
2,641 Posts
Looks awesome, dude!
Feels pretty good once you figure out it's not magic, just a combination of tips and techniques!

I haven't used Kevlar hinges, I'll let Johann or someone else answer those questions (and listen intently).

-= Dave
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Old Apr 29, 2012, 06:31 PM
Gravity = Enemy
Simon R's Avatar
Australia, New South Wales, Wollongong
Joined Jan 2011
40 Posts
Thanks Dave. I have been doing lots of reading, but cant quite seem to put my finger on the answer of the kevlar weight.
The wing came out awesome huh. A few minor mistakes, but I expected them after I sucked the bag down. (Afterthoughts )

All in all... Im very happy with the outcome. The pump never missed a beat also.

I'll wait for Johann or somebody else to answer.

Cheers

Simon
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Old Apr 29, 2012, 06:56 PM
let's FLY!
JimZinVT's Avatar
United States, VT, Castleton
Joined Dec 2007
2,086 Posts
Simon do you have any plans for your vacuum pump and controller? I have access to fridge and AC compressors but have been wondering how to build a controller. I'm not building with composites yet, but I figure it's only a matter of time

On the kevlar hinges: you might ask over on the Hand Launch forum....the DLG guys use them all the time.
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Old Apr 29, 2012, 11:45 PM
Stirring the pot
johannlochner's Avatar
Port Elizabeth South Africa
Joined Jun 2008
4,013 Posts
Hey,
Great to see some activity on t6his thread!
Well done Simon!!


We flew our Zally's off the Wild Coast this weekend....
They Rock!!!!
Here is some Zally action....


Zally's sloping the Wild Coast (2 min 28 sec)
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Old Apr 29, 2012, 11:54 PM
Fly fast, Dont crash.
Thepasty's Avatar
Cornwall, UK
Joined Sep 2006
2,459 Posts
nice first attempt!

Pretty light too... was this a pure test wing or have you plans to get it flying?

hmmmm Kevlar hinge, I remember seeing quotes of 36-50gsm as useable? lighter the better I guess (within reason),

cheers

Steve
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Old Apr 29, 2012, 11:57 PM
Fly fast, Dont crash.
Thepasty's Avatar
Cornwall, UK
Joined Sep 2006
2,459 Posts
Quote:
Originally Posted by johannlochner View Post
Hey,
Great to see some activity on t6his thread!
Well done Simon!!


We flew our Zally's off the Wild Coast this weekend....
They Rock!!!!
Here is some Zally action....


http://vimeo.com/41255430
Thats a cracking slope J!
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Old Apr 30, 2012, 12:31 AM
Stirring the pot
johannlochner's Avatar
Port Elizabeth South Africa
Joined Jun 2008
4,013 Posts
Simon, Steve's right!
The lighter the better....
I've just cut some DLG wing hinges with 50g Kevlar. They are probably the best hinge material, but if you don't watch out you'll still go thru. Kevlar is also a pain to work with if you don't know all the tricks.
Usually, I just use peel-ply.... cheap and I have lots of it around.
It works great!
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Old Apr 30, 2012, 02:03 AM
Building with TLAR precision
Zenmaniac's Avatar
near Madison, WI
Joined Jan 2009
2,641 Posts
Quote:
Originally Posted by johannlochner View Post
Hey,
Great to see some activity on t6his thread!
Well done Simon!!


We flew our Zally's off the Wild Coast this weekend....
They Rock!!!!
Here is some Zally action....
Great video, Johann. LOVE the agility and energy of those little birds!

Hope to see something in the air from Simon soon! ?

-= Dave
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Old Apr 30, 2012, 02:48 AM
Gravity = Enemy
Simon R's Avatar
Australia, New South Wales, Wollongong
Joined Jan 2011
40 Posts
Steve,

I thought light was good. I was trying my hardest to keep it light.

This is the first wing I have bagged. Came out great but..........
I got a bit keen on the LE with the sandpaper.
Do you glass a layer of CF on the leading edge and let it dry before you do the whole bag thing, or do you just do it all in one go?
I did it all in one go, and found it difficult to get all to sit right.
I really would love to see a complicated wing get built one day.

This is definitely made for flying. If its to light, well that's another learning for me.
I have a tail that weights 6 grams. I just have to make the pod now.

After all the banter in the last 2000 posts or so, I thought that the lighter this thing was the better. Maybe this will be a real light air ship.
Ill make another with some weight for those windy days we all like.

Will keep you all posted on its progress.
Im off to the Great Barrier Reef for 5 days tomorrow, so I will work on it when I get back.

Simon
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Last edited by Simon R; Apr 30, 2012 at 02:58 AM.
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Old Apr 30, 2012, 02:56 AM
Fly fast, Dont crash.
Thepasty's Avatar
Cornwall, UK
Joined Sep 2006
2,459 Posts
oh yes, lighter the better.

Even in bigger air a light Sally is brilliant fun, its so sleek it moves through the air very well.

This is one of mine at 180g in almost 30mph winds.

Sally in a good blow (1 min 59 sec)


At low weights it'll thermal off a side arm launch but equally rip it up in big slope lift
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Last edited by Thepasty; Apr 30, 2012 at 04:34 AM.
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