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Old May 07, 2015, 08:51 AM
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the gear was a tight fit.. but the weight up front is needed to balance the model..
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Old May 07, 2015, 09:51 AM
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Die DX8, DIE!
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Right on, now go fly it!

It should be a great performer in medium wind , looks sweet!
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Old May 08, 2015, 01:35 AM
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I had a stupid moment yesterday when working out the loadings... I completely forgot I had scaled the model for a 2" bigger span.. (old age is creeping in) It came to me as I woke up this morning , so I checked my area and found it was 2.1sqft..
with a weight of 190gms...6.7oz the loading is 3.19ozsqft...
This is bang central on the treks quoted 3.1-3.3..

It will be interesting now to see how it performs... as mostly its just the wing section that is different...
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Old May 11, 2015, 12:22 AM
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INFO......
I found the old flitetest review of the Alula , and at that time their flying weights were 209 and 219gms on the models they had put together... It will be interesting if I can measure their flight times on a chuck up...
I know I cant throw at all well but a comparison of sorts might be possible
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Old May 13, 2015, 06:34 AM
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The model has had some test glides and some discus chucks and there are problems...lol.. its me.. as I thought, I cant chuck it up more than about 30ft, then I am poor ( that's being polite) at flying it...
after a chuck and left alone its going/gliding nicely. it seems quite smooth and has a fast enough glide..
I am pleased with the results... the COG was fine, its very responsive to elevator inputs which says its near spot on... turning was fine.. but I was giving it too much stick and kept loosing height quickly
roll on a slope trip...
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Old May 13, 2015, 07:49 AM
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some video of just how useless I am at the DLG game.. being old and knackered does not help, I was very out of breath doing this.. that's why I go powered more often than not...
however this A-clone seems to have a fair glide so it looks like it will go well off the slope, and that's what mine is for..
.
A Clone 38 KFm11 trimming throws 13 5 2015 (4 min 51 sec)
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Old May 14, 2015, 05:16 PM
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Looking good Dave. Hope to see some video of the new A clone on the slopes.

Regards;

Dave-
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Old May 15, 2015, 12:50 AM
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I need a SW to S blow and some better weather...
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Old May 15, 2015, 11:58 AM
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That's the same wind I need and it just keeps coming from the E & NE :-(
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Old May 15, 2015, 12:05 PM
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Die DX8, DIE!
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Nice looking bird, it's got a great glide, it should really perform on the slope!

I've got a south blow right now, but i don't have a day off to hike up and fly the sleds, it's been hitting up to 45mph the past few days, slamming the big wall. The mountain wave is ridiculous, i can see uplifting vapor over the ridge screaming upward.
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Old Jul 02, 2015, 12:30 PM
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For what its worth, I built a kfm alula clone after being inspired by Dave Reap's efforts and based it largely on his but with different steps.
After much flying, both dlg and slope, I have concluded that although the glide angle and sink rate are ok, the speed range and manouverability are not, at least on my one.
No matter how hard I threw and with reasonable technique I could never get it high enough for a decent flight because it is so draggy at speed. Soaring and handling is ok but poor penetration and often blown back. Even with plenty of ballast, Ioz or more, it was a lazy soarer.
I may well treat myself to the new Alula Trek because it is such a beautifully refined design.
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Old Jul 11, 2015, 05:49 PM
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you are totally correct.. the kf wings are a bit more draggy , and the steps have more effect as they go faster.. more drag... thats good for power models as the flight is smoothed out.. but on gliders the extra drag combined with the light weight of the model is a killer...
being very light bits of foam they just will not glide fast, the drag is killing the speed which is already low..

Compare performance gliders... weights and loadings... to a typical foam build...

Ive noted on my prop jets that a small step going fast has the same effect as a deeper step going at a moderate speed.. this is the drag effect, so the initial high speed chuck up will show up as increased drag, which slows the launch and reduces your height..
I gave up on the dlg use as I couldn't get any height... they are best off a hill...

My best results come on a very thin wing section ..below 7% at its thickest point, and using very small steps for the build... using multiple 2mm layers to get the section... and keeping parallel steps along the wing with a curved back tip also helps as it effectively thins the tips section.. the small steps are not so draggy until the speed gets up...

weight is also an important factor... you might think light is best, but have you checked out the high performance gliders.. compared to our foamies the molded jobs weigh a ton..... they are heavy, with very thin wings and smooth slippery surfaces.... and go like mad.... any slight drag will affect their performance but their momentum carries them through...

you cant put all that weight on a foam model, its just too weak to take the punishment of heavyweight fast landings....

the proper trek and weasels are both great fun models.. they get the most out of the foam build...but being foam and lightweight, they still fall short of a high performance molded model.....my clones are a cheap attempt to emulate their looks and performance...

The twizzle below managed the performance I was after, but only in a very limited wind speed between 7-10mph ..look at it go at the 2.30 mark onward here... sorry the video is old and not so good but it gets better watching at full screen and in HD, the model gets moving so fast its a job to follow... thats what i was after from the clones...but following the A or W shape I cant manage it...
'
Twizzle from castle hill Thurham nr Detling (6 min 7 sec)
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Old Jul 24, 2015, 12:10 PM
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subscribed for august build
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