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Old Mar 29, 2013, 03:53 AM
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Whitchurch,Shropshire. UK
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Struggling with the Link Jim, But pleaased to hear of your success with the Fuselages
Hope you have a good Easter break the snows melted enough and its looking good for some flying on Sunday, Will take my camera.
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Old Mar 29, 2013, 02:20 PM
Entropy is happening!
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Bellingen NSW Australia
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Quote:
Originally Posted by Fubar 123 View Post
Struggling with the Link Jim, But pleaased to hear of your success with the Fuselages
Hope you have a good Easter break the snows melted enough and its looking good for some flying on Sunday, Will take my camera.
I don't know what is wrong with the link Chris. I just clicked on it, and it worked here??

I have not flown for months! Where about do you fly? Maybe I could look it up on Google Earth. Have a good fly and post some pics please.
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Old Mar 29, 2013, 02:59 PM
Dean
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Is this it?

Wompoo fuse (5 min 34 sec)
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Old Mar 29, 2013, 03:11 PM
ETS....Energy retention system
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gold coast australia
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Nice work Jim..

Tim
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Old Mar 30, 2013, 05:03 AM
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It looks great Jim, That bladder really pushes some epoxy out.
Great result .
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Old Mar 30, 2013, 05:18 AM
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Quote:
Originally Posted by Jim.Thompson View Post
I don't know what is wrong with the link Chris. I just clicked on it, and it worked here??

I have not flown for months! Where about do you fly? Maybe I could look it up on Google Earth. Have a good fly and post some pics please.
Hi Jim,
Just been looking on Google Earth.
We will be flying at Ashes Hollow at the Long Mynd.
The Long Mynd is a series of hills in Shropshire, it is roughly a Triangle of ground bounded by three towns/villages, Church Stretton, Ratlinghope and Wentnor on the England / Welsh border.
The approx Coordinates are Long 52.547065 ( N )
Lat -002.848283 (W)
Will Take some Pics
Chris
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Old Mar 30, 2013, 05:31 AM
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Bellingen NSW Australia
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Originally Posted by Fubar 123 View Post
It looks great Jim, That bladder really pushes some epoxy out.
Great result .
Yes, it sure does Chris.
I started with low pressure in the bladder, about as low as I could set the compressor output. Then I increased it very slightly about 45 mins or so after and again sometime later untill I got it up to approx. 20 psi. I did this thinking that if it was leaking, or did burst, I would get some of the epoxy exuded out before it did so. As it turned out, the bladder was fine.
This procedure was more due to a lack of confidence rather than anything else.

I have a silent compressor made up for this job as well as for airbrushing. I made it from an old Chinese cheap one that the compressor pump had failed on and used a fridge compressor as the pump. It's been good, and it means that I have air on in the shed all the time without the noise of the big compressor switching on. Also, I can leave in on all night without disturbance.

I'll look up the Co-ords you gave me later on. Thanks. It's interesting to see where other folks fly. I'm short of flying sites at present, as I think I already said.
I'm off to New Zealand in May to fly with my brother on some of the west coast sites there. Should be good.
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Old Mar 31, 2013, 02:01 PM
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Here you go Jim,
Here is a taster of Todays Flying.
I will post some photos later and coordinates from Google Earth as we could not get up the Long Mynd their was too much Snow.




Middletown Hill Easter 2013 (0 min 33 sec)
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Old Apr 01, 2013, 12:00 PM
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Hi Jim,
The Coordinates of Middletown Hill are

52.713300 N
-03.028421W

The Wind was from S.S.E at about 12 to 16 mph.
Here is a few pics of Woodys Caldera, Doc Petes Extreme as its a good hike up the hill I opted to carry little took just the Speedo up through the snow.
A lot of fun had.
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Old Apr 01, 2013, 02:32 PM
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Great pictures Chris, thanks!

I can't imagine flying in such cold conditions.

I have a Speedo too! Actually, I have two, one light and one heavy. The heavy one is a four servo wing and both have rudders. Great little planes.
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Old Apr 05, 2013, 09:07 PM
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Bellingen NSW Australia
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First tail surfaces.

The first tails are out of the moulds. They look ok all things considered.
However, they have a couple of slight flaws and I'm most likely build another pair.
I placed the control surface spar a little too far forward and it impinges on the hinge line. Also, on one of them, the hinge stepped slightly, perhaps due to the former.
I'm pleased with the primed surface and the clean way they pulled from the moulds.
Progress happens.

Pics with next post...........
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Old Apr 05, 2013, 09:38 PM
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Bellingen NSW Australia
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Originally Posted by timbuck View Post
Nice work Jim..

Tim
Thanks Tim.
Do you recall posting a description of a simple air supply line cooler and water trap for spray painting somewhere?
I'm working on making up something using fairly standard copper pipe riser(s) and valve at the bottom etc. I can mount it on the side of my tin shed, which will assist with cooling etc.
I seem to vaguely recall you (or someone else) described something along these lines.
I'll probably incorporate something like this filter into the line:
http://www.ebay.com.au/itm/1-4-PT-Co...item4d07b86180

Pics were meant for the previous post:
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Old Apr 05, 2013, 09:49 PM
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Tailplane size - "K Factor".

After doing much (or most) of the design using the TLAR method, I did the "K Factor calculation as below and posted by "Flying Beagle" elsewhere:

"K= (Stab Area)x(distance between 1/4 chord points) divided by (Wing Area)x(Average wing chord)

Really nice flying planes have K~0.5
Trainers have K~0.6
Racers and high aspect ratio sailplanes K~0.4
K~0.3 is almost unflyable."

My tailplane's combined horizontal projected size (effective stab area) worked out giving a K factor of circa .46
Should be very suitable, based on the above.

The tail on the vac bagged prototype was too big, at least 10% larger.
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Old Apr 05, 2013, 09:59 PM
Life begins at transition
Australia, VIC, Sale
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Looks a lot like tail volume coefficient! It's amazing how people work out these things without being taught!
Out of interest, a Piper Cub has a Vh (K as you call it) of .34

Some nice lookin' stabs, even if the internals aren't 100%.
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Old Apr 06, 2013, 01:55 AM
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Bellingen NSW Australia
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Originally Posted by Odysis View Post
Looks a lot like tail volume coefficient! It's amazing how people work out these things without being taught!
Out of interest, a Piper Cub has a Vh (K as you call it) of .34

Some nice lookin' stabs, even if the internals aren't 100%.
Is that figure derived using the same equation?
Thanks, I'm pleased with the moulds and the release system. I did have some concern with one of the plugs persistently warping slightly despite multiple efforts to straighten it. I ended up restraining it to the parting board in the end with a flicker of doubt remaining in my mind. However, both parts look nice and true to my eye.
What I cannot see does not bother me!
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