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25.9g homebuilt heli - 1/23/2008 1:58:59 AM   
U.S.U.L



Posts: 14
Joined: 5/9/2005
From: Gdansk/Brodnica, POLAND
Status: offline 		Hello

This is my first thread here on rcuniverse

Last 3 weeks I have been working on ultralight fixed pitch, 4ch(2.4GHz), fully controlable heli.
It uses:
- 5 gram brushless outrunner(2000kv)
- HW pentium 6A ESC
- GWS ics50 ESC for tail
- 2x BA 2.5g servos
- 2s100mAh battery pack
- Esky HH gyro
- AR6100 rx
Every electronic component is lightened as much as possible. For example i was able to get the ar6100 rx from 3.75g to 1.4g or esky HH gyro down to 1.7g.
Rotorhead is 170mm, motorized tail, most parts and frame from CF, bearings for mainshaft and swashplate.

As You can see on the VIDEO from second test flight it flys really stable and predictible. I have yet to make some king of canopy for it.


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< Message edited by U.S.U.L -- 1/23/2008 1:59:48 AM >
       Post #: 1

RE: 25.9g homebuilt heli - 1/23/2008 2:40:37 AM   
srouthouse


 

Posts: 734
Joined: 11/5/2007
From: auburn, CA, USA
Status: offline 		man that is awsome great job thats what you call skills

(in reply to U.S.U.L)
       Post #: 2

RE: 25.9g homebuilt heli - 1/23/2008 4:03:45 AM   
dknovick



Posts: 727
Joined: 1/19/2005
From: Albuquerque, NM, USA
Status: offline 		Nice!

That's quite a gear train!

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RE: 25.9g homebuilt heli - 1/23/2008 10:07:14 AM   
U.S.U.L



Posts: 14
Joined: 5/9/2005
From: Gdansk/Brodnica, POLAND
Status: offline 		Thanks Guys. I forgot to mention both servos are completely custom made using 4mm vibra motors, GF sheets, and electronics from BA servos. Each one weights 1.3g and would be even lighter with smaller SMD pot.

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< Message edited by U.S.U.L -- 1/23/2008 10:09:32 AM >

(in reply to dknovick)
       Post #: 4

RE: 25.9g homebuilt heli - 1/23/2008 11:34:50 AM   
myatesklan


 

Posts: 66
Joined: 11/16/2007
From: Brandon, WI, USA
Status: offline 		Man, that is one stable little heli, very impressive! I don't know what you do for a living, but you could make a fortune with your skills. You are brilliant! Thanks for sharing with us.

Please keep us posted with more vids and how the canopy is coming along.

Matt





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Matt
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(in reply to U.S.U.L)
       Post #: 5

RE: 25.9g homebuilt heli - 1/23/2008 1:50:51 PM   
dknovick



Posts: 727
Joined: 1/19/2005
From: Albuquerque, NM, USA
Status: offline
quote:

ORIGINAL: U.S.U.L

Thanks Guys. I forgot to mention both servos are completely custom made...


Kinda figured... Beautiful

I don't know if these have enough torque (probably not for a heli), but Plantraco has these really small/light magnetic actuators
http://www.microflight.com/Online-Catalog/Actuators-and-Servos

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What goes up, most come down. How hard depends on you!

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       Post #: 6

RE: 25.9g homebuilt heli - 1/24/2008 2:09:39 AM   
Robotcheney


 

Posts: 18
Joined: 1/2/2008
From: Napa Valley, CA, USA
Status: offline 		Man, that is awesome, nice work.
How much do you think it cost to build all said and done ?

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If all else fails, let gravity take the sticks.

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RE: 25.9g homebuilt heli - 1/24/2008 9:02:41 AM   
U.S.U.L



Posts: 14
Joined: 5/9/2005
From: Gdansk/Brodnica, POLAND
Status: offline 		Thank You. It cost me about 130$ without receiver.

(in reply to Robotcheney)
       Post #: 8

RE: 25.9g homebuilt heli - 1/24/2008 9:11:44 AM   
smokinxtreme



Posts: 98
Joined: 1/4/2008
From: Rancho Palos Verdes, CA, USA
Status: offline 		that is awesome......................

(in reply to U.S.U.L)
       Post #: 9

RE: 25.9g homebuilt heli - 1/24/2008 9:28:09 AM   
lamrob



Posts: 148
Joined: 11/9/2006
From: HK, HI, HONG KONG
Status: offline 		That's awesome !!!

Where do you get the parts for the rota head (Walkera ?) ? The tail locks pretty tight from the video. Can you try chucking it around and do some figure 8 ?

Cheers....

Great work.

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       Post #: 10

RE: 25.9g homebuilt heli - 1/24/2008 2:41:49 PM   
devens



Posts: 295
Joined: 12/27/2006
From: Decatur, IL, USA
Status: offline 		very cool

D

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(in reply to U.S.U.L)
       Post #: 11

RE: 25.9g homebuilt heli - 1/24/2008 5:27:57 PM   
U.S.U.L



Posts: 14
Joined: 5/9/2005
From: Gdansk/Brodnica, POLAND
Status: offline 		All parts are made from scratch by my hands On Sunday i will be flying on a large hall, try some ff and take another video. I use the same combo for tail that has been on my previous 50g heli(see from 05:33s http://media.putfile.com/7th-international-flying-model-picnic-Zar-2007) - GWS ics50 ESC plus esky HH gyro. It worked very well so shouldnt be any worse here.

(in reply to devens)
       Post #: 12

RE: 25.9g homebuilt heli - 1/24/2008 9:51:11 PM   
North Star


 

Posts: 40
Joined: 5/18/2007
From: Santa Ana, CA, USA
Status: offline 		WOW!!!! You sir, are amazing!

(in reply to U.S.U.L)
       Post #: 13

RE: 25.9g homebuilt heli - 1/29/2008 12:32:05 AM   
U.S.U.L



Posts: 14
Joined: 5/9/2005
From: Gdansk/Brodnica, POLAND
Status: offline 		New video from sunday flying in a large hall is up -

http://www.mediafire.com/?9wzcyz9xzxw