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Aerial Photography and Video > New purpose built cam copter

terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

Hi all,
I've started thinking of building a self designed heli strictly for AP/V. I'll cnc-cut the frames and bottom plate along with some other parts myself, and the main mechanics such as head/swashplate will be Vario. The servo placement will be like the Vario Acrobatic that I allready own to be able to use the same direct connection between servos and swashplate.
Rotor diameter will be 1780mm. There will be electric power, I'm thinking around 3000Watts to the main rotor, and an independent motor/ESC switch-activated for the tail.
I don't have any particular experiance with electric helis, so any input on this is welcome.
The heli will be built solely for camera flying, so there will be nothing in front og the main mast exept for the camera mount, and the tail motor will be directly mounted on the aft of the boom.

Due to not having to much time, this will be a slowly progressing project, and I would like to have most of it drawn up and assembled on the pc before starting to make any parts.
I'll update with pics as i move along if anyone are interrested.

10-24-2009 10:33 AM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

I'm moving away from Vario mecanichs in favor of Bergen. I'll still be using the Acrobatic style direct linking between servos and swash, though. And after a chat with Chris I think I just might go FBL.
It will be a first time for me without a flybar. It will also be a first time with a big electric bird.
-Any pointers on the electric configuration will be most welcome

What I'm thinking about is using a big "El Cheapo" brushless motor from Hong Kong and make a cooling fan for it, just to see how that will work out. Framewise there will not be any problems replacing it with something better if it doesn't work.
I'll need power similar to a 30-50cc gasser.

10-27-2009 08:54 AM

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Makiedog
Senior Heliman
Location: Minneapolis

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3000 watts seems overkill for the motor. My 20 lb Observer requires no more than 1,400 watts (peak).

Seems like a big waste to buy a Bergen, remove all the mechanical mixing, and then have to design servo mounts to do eCCPM. If eCCPM is what you desire, then going with Vario seems more logical.

Pat L

10-27-2009 09:14 AM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

Thanks for your input on the motor Pat.

When it comes to the mechanics I'll just be buying the parts that I need, like head assembly and swash plate.
I'm designing and making all the frames myself.

10-27-2009 04:44 PM

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Helicek
Senior Heliman
Location: istanbul - turkey

My Posts This: Topic Forum

Hallo Terje,
is that your name?
I have built a few ap helis my self. Some turned out ok and others did not. I copied some proven designs and more.
I have 3 projects on the bench. 2 electrics and 1 gas. All front mount.
Then I designed a simple 3 axis camera mount which is almost done.
Soon I will be fitting this mount to these ap helis.
It is very nice to see others push the frontiers and design something out of the ordinary (not to offend any existing system please).
Your post encouraged me to work harder on my projects to get them flying. I wish you all the best.
But please post some pictures of your project be it a drawing or else.
I will be following your proggress.
Cheers,
Ahmet

10-27-2009 05:03 PM

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ericslife
Senior Heliman
Location: vancouver b.c. Canada

My Posts This: Topic Forum

Bergen is great stuff but i like the vario better, you could always use a XLV head if you need something BIG. but if you building custom anything will work tho'
2c worth
happy rotoring!
Eric D

10-27-2009 07:44 PM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

Hello Ahmet,
I looked at your gallery, and there was some inspiring pictures. You have tried a lot of different designs.

On my design the heli and the camera mount will be two parts to make transporting as easy as possible. The tail boom will also be very easy and quick remove and reassemble, as there will be no moving part to realign when assembling.
I'll post som drawings in a while, there are still a lot of details and measures to work out before I have anything to post. Please be patient, I have never done this before

10-27-2009 07:51 PM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

Yes Eric, both Bergen and Vario are good. I've been flying both, but as you say, this is a custom build and for the parts that I'll be buying they will both work just fine.

I just got some aluminum for the frames today, so once I decide on the drive train I could start making the frames and bearing blocks. I am leaning towards a two stage drive train with a timing belt for the main rotor. Just have to find some sources for belts and pulleys.

10-27-2009 07:57 PM

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PhotoAir
Heliman
Location: Blainville, QC - Canada

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Mount under slug / front

You guys are inspiring. It pushes me to work on my project. I'm currently in design phase of an under slug/front mount. Almost all components have been selected. I’m looking at a cheap 3 turn pot for servo feedback. I will be posting progress in my gallery.

I'm using Pro Engineer.
What CAD system are you using?

Fred

10-28-2009 01:46 AM

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jascamera
Veteran
Location: brooklyn, NY

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I been flying AirStar Evolution, they should share the same frame with Vario. I have convert it to Electric for half a year, flys well. And recently I have make a custom Electric frame as well for my camera mount. Once I find time will put one together.

http://skyshutter.com/AirStar.jpg

Jason

10-28-2009 04:27 AM

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nooobs

Elite Veteran - Location: Toronto, Canada - My Posts This: Topic Forum

Hey this looks familiar Jas...

10-28-2009 04:29 AM

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jascamera
Veteran
Location: brooklyn, NY

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Yeah, that's my product.

j

10-28-2009 04:33 AM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

noobs, jas????

Fred; Nice looking mount, keep posting!
I'm using Alibre, and looking at SolidWorks.

10-28-2009 07:18 AM

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daytonabeach
Elite Veteran
Location: Oslo, Norway

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Cool, a red Copterworks frame

Never argue with an idiot, he'll drag you down to his level and beat you with experience...

10-28-2009 07:48 AM

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lele
Veteran
Location: italy

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....I was selling this heli with my concept mount about 2 yars ago here on RR

......

[title] My Gallery Photos
[img] /fastphoto/20439/Foto_6_.jpg [desc]

Lele

10-28-2009 02:08 PM

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PhotoAir
Heliman
Location: Blainville, QC - Canada

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Wow, very similar to what I'm doing now.
Was it working good?

Any positive and negative comment about this design?

Fred

10-28-2009 06:45 PM

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bill the greek
Veteran
Location: www

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I dont remember who but i see this design years ago here and if i reme,ber well has good results.

Bill

Nobody is Perfect but who want to be Nobody...

10-28-2009 07:29 PM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

I just ordered the parts for the drivetrain the other day, and once they arrive I'll be able to finish the frame drawings and start cutting.
I may have gone a little overboard on the belt dimension, using a 15mm wide belt. A 9mm would probably have been more than enough.

The helicopter will be flybarless, I am considering a Gyrobot 900 for stabilization and swash mixing, any thoughts on this? Anyone out there who have tried it?

10-31-2009 09:20 AM

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fergus
Key Veteran
Location: Ireland

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Gyrobot is less precise than helicommand rigid and the AP2000i from what I have read.

Regards

Fergus

10-31-2009 10:25 AM

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terje
Senior Heliman
Location: Mysen, Norway

My Posts This: Topic Forum

Preview photo

Here's a pic of how the frames look so far. None of the lightening holes have been drawn yet, as I don't have all the measurements of the drive train yet. -Anyone know the diameter of Bergen main gear and 12 tooth pinion?
The rear stands going down towards the main gear needs to be shaved of some material aswell. Receiver and gyro will be seated on top of the tail boom clamps, and so far it seems as a fairly good balance point with camera gear mounted up front will be acheived if the two 5 or 6 cell battery packs are mounted on either side of the rear "legs".
The helicopter will be the size of a 26cc gasser with an 1800mm rotor.

10-31-2009 10:43 PM

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Aerial Photography and Video > New purpose built cam copter

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