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Old Dec 01, 2008, 11:07 AM
Lad
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St.Petersburg, Russia
Joined Feb 2005
73 Posts
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225 mg so far, but gonna be lighter!

Wing span 71 mm
Length 70 mm

Motor with gear-box 18 mg
Propeller 25 x 15 mm 2 mg
Receiver 13 mg
LiPoly ? mAh 167 mg
Airframe+actuator 18 mg
Others 7 mg

Total 225 mg
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Old Dec 01, 2008, 11:12 AM
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gbarc's Avatar
Jackson, Michigan, United States
Joined Nov 2002
1,388 Posts
Holy crap !!! Thats very nice!!! Just how the heck can you make it lighter? You can't mold air into a plane !!!



Cheers,

Greg
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Old Dec 01, 2008, 11:49 AM
The ceiling is the limit!
micromad's Avatar
South of England
Joined Aug 2004
1,237 Posts
Fantastic work Lad. Did you use a cut down lipo?

Alex
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Old Dec 01, 2008, 12:11 PM
Be afraid!
Cuddles's Avatar
Milano
Joined Dec 2003
458 Posts
You simply rule.

Best regards,
Francesco
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Old Dec 01, 2008, 12:49 PM
Inciting Riots
village_idiot's Avatar
Joined Dec 2006
9,687 Posts
There are a few milligrams of extra wire that could be removed, but that is about all I can see that can be removed. Maybe a different design on the motor or a different battery.

Looks great!.


This does bring up the question of what is the lightest RC controlled plane?
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Old Dec 01, 2008, 01:00 PM
in persuit of low wing loading
Gordon Johnson's Avatar
Boston, Mass
Joined May 2001
6,432 Posts
Lad,
Incredibly nice airframe. It's a very elegant combination of functionality and minimalist structure. And your motor, prop, and other hardware are very nice and light too. Excellent. I think you may have the lightest plane, possibly by a fair number of milligrams.

Gordon
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Old Dec 01, 2008, 06:09 PM
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Martin SJ's Avatar
Thousand Oaks, California
Joined May 2004
342 Posts
Congratulations, Lad! That is outstanding! And such an interesting design.

How about some details on flight times? And is that a re-built battery?

Great work,
--Martin
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Old Dec 01, 2008, 06:49 PM
Mc-Fly
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Melbourne-Australia
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Genius!
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Old Dec 01, 2008, 07:23 PM
Your ruler, in part...
Angry_Monk's Avatar
Albany, NY
Joined Mar 2005
731 Posts
My god Lad!

your component weights are inconceivable! please, more details (on everything)! and a video!

amazing work... i can't believe it. how did you pull of a 13mg rx??? i'm assuming you are using a magnet from a quartz wrist watch in your motor? and how in the world did you cut down a li-po? and is it stable (no capacity reduction over time)? and what about flight times?

and you can make it lighter? ...my god... slow down.

seriously, amazing work... absolutely incredible.
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Old Dec 01, 2008, 07:37 PM
Mc-Fly
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Melbourne-Australia
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1,110 Posts
Yeah look at the size of that BL motor would you

It looks to be slightly smaller than the Allegro BL Controller Chip!
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Old Dec 01, 2008, 07:40 PM
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outstanding. did you cut the lipo in half? inspirational work.
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Old Dec 01, 2008, 07:58 PM
Mc-Fly
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Melbourne-Australia
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1,110 Posts
Hey Lad, go for the Silicon Wire switch and you might save 0.005mg
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Old Dec 01, 2008, 09:01 PM
I'm a registered user!!!
*314*john*314*'s Avatar
Joined Feb 2008
518 Posts
Why dont we see more of this micro models?
is the cost just to high or are people scared off by the time it takes to make one?
where can i find cf that size?

how much lighter can you get it? maybe 215 mg at the max?
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Old Dec 01, 2008, 11:49 PM
Mc-Fly
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Melbourne-Australia
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Because at this size it is literally impossible to make!!!

Only the elite few can make this at home with an arsenal of tools...

I'm not quite sure whether you understand the complexity of something of this size and weight.

To give you an understanding, it is the weight of 1/10th of a Kleenex Tissue Go on and weigh a tissue, i bet it weighs 2g.
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Old Dec 02, 2008, 02:09 AM
Lad
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St.Petersburg, Russia
Joined Feb 2005
73 Posts
Thank you all for the congratulations.

I cut 8.5 mAh li-poly rebuilt up to 273 mg in halves in argon and sealed it with alu foil.
The battery was cut 6 days ago - no capacity reduction over time so far.
In the picture you'll see the argon box.

Motor

2 Magnets D 1mm L 0.5mm, rebuilt
2 Coils: wires D 0.02 , windings 220 , 72 ohms
Gear-box 1 : 6.7

static thrust with prop d 25 x 15 0.14 gr
current 24 mA
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