High-Lift Blades? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-02-2008, 05:31 PM   #11
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Re: High-Lift Blades?

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Thanks for the links. Really helpful.

I'll throw the project gauntlet out there just to see who's interested.....

A few weeks ago, a mate of mine asked me if I was still into RC; he wanted a mini remote head for a "bear cam", essentialy a pan-tilt on the end of a painters pole, that he could get "bear, FPV victim" footage for a Discovery network show.

Bearcam? No problem; JR reciever from Megatron(thanks), and some servos & bits from hobby hobby. $160. 4 hours.

My friend loved it(I'll post footage when released), then asked about RC Helis. We looked at a lot of designs, from wescam to servo city types, and realized we could build something of merit.


I'm embarking on a journey to provide my best friend the best damn heli-cam ever made. I'm a decent fabricator, with plenty of design back ground, CNC & CAD, and 8 years as a senior technician in the motion picture biz. (go to crewpix.com, search "Patrick Thompson". C'est moi.

The knock list for the Mark 1 rig goes something like this:

Carbon fibre frameset, probably TREX 600 CF E as a base.
Full metal gear, carbon where applicable
High performance motor and plenty of battery.
Multi blade head (for less vibration, so I've been told).
Assymetrical Blades; probably a custom build.
Multi blade tail(as above)
Retract Gear
GPS guidance, position & heading hold- no 3d manouvers required at all, favouring stability, flight time and altitude max.
Flight stabilized; I'm no pilot, but I'll be learning on a 450 Trainer, with instructor, of course.

1.4 lbs, HD Hitachi broadcast head, compliments of SIM Video in Toronto
60 gig hard drive

Gyro stabilized, Pan/tilt/roll, zoom focus, run/stop
Carbon fibre
X/Y/Z stabilized low profile mount, noze or belly mount
1.5 lbs design limit

Telemetry-Courtesy of Zoltan
Video timecode
2 witness channels
Composite video
Pilot pov with GPS overlay
Power on all systems overlay

4 months. Open Budget.

Who's comin' with me??

Patrick.thompson@rogers.com ........ if any one is interested. I don't want your money, just your brains & advice.


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Old 07-05-2008, 11:16 AM   #12
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Re: High-Lift Blades?

Hmmm, some thoughts.(opinions, no real expert here)
Multi-blade head- slower rotation= less vibration if well balanced and less noise. Good thing. But no flybar,less inherent stability, so usually recommended to use a Helitronix or similar mixer for stability (more complicated, harder to get setup up if not experienced) and more $$ (not issue, right?)
Centuryheli.com, Starwood models, Vario sell multiblade heads and tail rotor systems.
Power- Will need lots. 600 size airframe may not be big enough? What about larger rig (ie Maxi Joker, Bergen Observer, etc? Bergen is getting into big electrics now too, may be able to build up an electric based Observer type rig.
Gonna need lots of channels..
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Old 07-05-2008, 01:43 PM   #13
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Re: High-Lift Blades?

I've looked at a few systems like tyhe vario, century turbines & Bergens, also the big mikado logo 24's; big birds, aye.

I'd rather reduce the payload with a more efficient camera & head combo, using micro systems & smaller stepper motors for the head, vs. servos.

Though the flight time requirements are tough- 20 minutes or so, a competent pilot can surely achieve this.

I've been talking to some lads over at RunRyder, they're providing great avionics support & tech info.

I'd like to keep the turn-key package under the $10k mark, including camera & video, so the parts list seems pretty realistic.

Century's 5 blade heads look like a great option, and asymetrical blades are being drafted up by a mate over at Agusta Helicopter.

I'd love to do a big, stable turbine rig, but the money would be better spent on telemetry and battery/motor development.

Thanks for the info; I'll start posting up CAD drawings of the camera gimbal for feedback, within a few weeks.


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