225 mg so far, but gonna be lighter! - RC Groups
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Dec 01, 2008, 10:07 AM
Lad
Lad
Registered User
Discussion

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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Dec 01, 2008, 10:12 AM
Registered User
gbarc's Avatar
Holy crap !!! Thats very nice!!! Just how the heck can you make it lighter? You can't mold air into a plane !!!



Cheers,

Greg
Dec 01, 2008, 10:49 AM
The ceiling is the limit!
micromad's Avatar
Fantastic work Lad. Did you use a cut down lipo?

Alex
Dec 01, 2008, 11:11 AM
Be afraid!
Cuddles's Avatar
You simply rule.

Best regards,
Francesco
Dec 01, 2008, 11:49 AM
Inciting Riots
village_idiot's Avatar
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?
Dec 01, 2008, 12:00 PM
in persuit of low wing loading
Gordon Johnson's Avatar
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
Dec 01, 2008, 05:09 PM
Registered User
Martin SJ's Avatar
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
Dec 01, 2008, 05:49 PM
Mc-Fly
Veteran's Avatar
Genius!
Dec 01, 2008, 06:23 PM
Your ruler, in part...
Angry_Monk's Avatar
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.
Dec 01, 2008, 06:37 PM
Mc-Fly
Veteran's Avatar
Yeah look at the size of that BL motor would you

It looks to be slightly smaller than the Allegro BL Controller Chip!
Dec 01, 2008, 06:40 PM
Registered User
outstanding. did you cut the lipo in half? inspirational work.
Dec 01, 2008, 06:58 PM
Mc-Fly
Veteran's Avatar
Hey Lad, go for the Silicon Wire switch and you might save 0.005mg
Dec 01, 2008, 08:01 PM
I'm a registered user!!!
*314*john*314*'s Avatar
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?
Dec 01, 2008, 10:49 PM
Mc-Fly
Veteran's Avatar
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.
Dec 02, 2008, 01:09 AM
Lad
Lad
Registered User
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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