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Old Feb 03, 2012, 10:02 PM
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United States, IL, Rockford
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My 600mm micro DLG

Just finished this gal tonight (thanks to Yasu, a RCgroups member from Japan)

Wing Span = 600mm (23.6")
Length = 500+mm (5mm outer diameter CF wrapped boom)

Ar6300
Hyperion 1c
x1 Eflite long throw linear (rudder)
x1 HK standard linear (elevator)

Weigh-in and flight trials tomorrow. Should be 26-30grams.
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Old Feb 04, 2012, 09:06 AM
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Looks super! Looking forward to flight reports Aero
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Old Feb 04, 2012, 12:48 PM
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Angleton, Texas
Joined Mar 2007
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Very Nice!!!

"samson55"...That's a really nice sailplane. You need to post how to build it...or give us a link it. I'd love to build one.


Well done! Thanks for sharing,

John
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Old Feb 05, 2012, 12:12 AM
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United States, IL, Rockford
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Originally Posted by TexasThermalKing View Post
"samson55"...That's a really nice sailplane. You need to post how to build it...or give us a link it. I'd love to build one.


Well done! Thanks for sharing,

John
Thanks! I referenced these hand drawn plans and E-mailed back and forth with the author to clear up many questions. I also studied his photos of the various versions he built over the past couple years.

For a pod I used two shells from these super glue packages:


-Sam
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Old Feb 05, 2012, 02:35 PM
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We appreciate the notes on the build! Great idea on the pod! I see the submicro servos
you used. Nice work! My hat's off to you guys on the concept!

Thanks " samson55 " for sharing it with us.

John and the Red Tailed Hawks
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Old Feb 05, 2012, 08:16 PM
let's FLY!
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United States, VT, Castleton
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For a pod I used two shells from these super glue packages:
This is just brilliant!
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Old Feb 07, 2012, 04:38 AM
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hi,
is it possible to have 1 to 1 pdf drawings of this DLG?
thank you
Ziad
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Old Feb 07, 2012, 10:10 AM
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hi,
is it possible to have 1 to 1 pdf drawings of this DLG?
thank you
Ziad
I dont have a way to do that (no cad or PDF program)

I just use the measurements and draw out the wing on a flat piece of balsa. Just find your length and centerline - measure your width at the middle, then half way down each side per the drawings, and then at the tip.

The airfoil is just a bit of talent and TLC.

I wish I could help more. But you will just have to try to do the measurements and draw straight lines.





My wing and tail surfaces are not exactly like Yasu's. I just took my time to get it close. I am going to cut another one and see how much weight I can shave off.
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Old Feb 07, 2012, 03:44 PM
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Ok, thanks for the info, I think I should give it a try, there is nothing to loose anyway..
For the wing it's 6mm and the tail is 2.5mm right?
What is the diameter for carbon tube, or what kind of tube u used?
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Old Feb 08, 2012, 01:56 PM
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Carbon tube - I used a wrapped 5mm tube non-tapered. I may try a 4mm non-taper next, but the guys in Japan like to have a tapered tube to reduce tail weight - hence cutting and chance of needing ballast up front. Non-taper is cheaper and easy to get.

Yasu uses an Avia skinny UL tube.

Finally had a dead calm morning and had some fantastic flights. Launches were smooth and longest flight time was 55sec. Can't wait for thermal season.
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Old Feb 08, 2012, 02:07 PM
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Hi Sam ,
Maybe you can put some detailed pics of the new wing that u are going to make...
Nobody was filming ur flights?
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Old Feb 08, 2012, 02:30 PM
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Hi Sam ,
Maybe you can put some detailed pics of the new wing that u are going to make...
Nobody was filming ur flights?
I was on my way to work, so no filming today. I plan to get footage at in indoor sports center soon.

I will post pics, but it will be almost identical to Yasu's wing in his last 600mm blog thread. My current wing has a flat underside - which I plan to carve out on this next wing.



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Old Feb 08, 2012, 10:31 PM
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USA, ID, Coeur D'Alene
Joined Dec 2003
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oh man, an undercambered solid balsa wing! makes mine look like an ancient arf model! link

mine is 24 inch span so only 9.6mm longer than yours. but i am not getting anywhere near 55 second flights. maybe mid 30's, if i'm lucky. though i'm only getting 45-50 foot launch from it too.
i just got some more balsa, so i may have another go at it
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Old Feb 10, 2012, 11:50 PM
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so, i'm making another one following Yasu's blog, but i ran into a tough call. i have 2 tubes i could use for the boom, one is larger in diameter and about 1.2 grams heavier, but i can run both push rods down it. the other one i have can fit one down it, is lighter, but also more flexible...
so do i go for more rigidity and weight with less drag, or less weight and slightly more drag?
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Old Feb 11, 2012, 12:16 AM
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so, i'm making another one following Yasu's blog, but i ran into a tough call. i have 2 tubes i could use for the boom, one is larger in diameter and about 1.2 grams heavier, but i can run both push rods down it. the other one i have can fit one down it, is lighter, but also more flexible...
so do i go for more rigidity and weight with less drag, or less weight and slightly more drag?
What are the diameters? 1.2 grams isn't bad. Historically mini DLG/HLGs like the Blue Arrow Angel had larger booms that what people would be comfortable with today. The Elf dlg has rods running on the outside, so I think the drag is minimal. I ran mine outside so I could have control of their flex. Yasu uses guitar string through a tube. The key I think is to make a really light weight wing. I even think I sprayed mine with too much lacquer. But like I said above, build everything light behind the prescribed CG so you won't need to add any nose weight. Add your wing last because the nose works on the seesaw principle - move the wing towards the tail and the nose becomes heavier. Etc.

Keep us updated with pics!
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