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Tandem Rotor Helis Vertol Chinook > Head count on CH46/47 E conversions
 
 
wilerbee
Senior Heliman
Location: Hong Kong

My Posts This: Topic  Forum

Heads up guys,

The October issue of RC Sport Flyer has an article in it on the conversion as well as the motor, batteries, ESC specs. Check it out !
No ! I don't work for RC Sport Flyer !!
09-08-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum		Not to change the subject.. but. Does anyone have access to Boeing CH47 dimensioned drawings? Specifically the Door 1R rescue winch showing details other than a blob hanging outside. A good set of prints showing STA, WL & BL locations would be good. I have some Emails into Boeing Virtol but not holding my breath on those.

Cheers, Doug
09-08-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum		Answered my own question about the drawings. See:
http://www.chinook-helicopter.com/Drawings/Structure/Structure.html.
Still need winch data however.

Cheers, Doug
09-08-2008 Over year old.
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darkfa8
Key Veteran
Location: Eatontown, NJ - USA

My Posts This: Topic  Forum		am doing one here... just waiting on making a motor mount

- Dan Goldstein -
09-09-2008 Over year old.
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michaelf
Heliman
Location: Adelaide, South Australia, Australia

My Posts This: Topic  Forum		I'm in the final stages of building mine. I went staight for the e-conversion, did'nt think nitro looked or sounded the part. Should have it in the air in about a week or so.

Michael
11-16-2008 Over year old.
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		Flight times with electric conversion?

What sort of flight times are you folks getting with the electric conversion? What voltage and capacity battery are you using?

Every heli I have is now electric powered. I am used to 14 to 18 minute flights depending on the helicopter (2 bladed, 3 or 4 bladed) and weight (16 to 36 pounds). I am just wondering what typical flight times are for a typical configuration with this model?

thanks,
Joel-
12-03-2008 06:48 PM
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum		I am getting 10 minutes with mine running (2) 4S 3750"s!

Richard

o
12-03-2008 07:07 PM
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tow cobra
Senior Heliman
Location: Riverhead, NY

My Posts This: Topic  Forum		I initially tried to run 2 4s lipos with approx 2000 mah however, the flight times were minimal before voltage cutoff.

I have since upgraded to 2 4s 3750's as this seems to be roughly the consensus in the posts on the Chinook E-conversion here on RR.

Out of curiosity, Helitronix, what is the helicopter that you have that weighs 36 pounds and runs on electric. I've got to see a picture of that.
12-03-2008 07:24 PM
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		My 36 pound electric helicopter

The large electric machine is the Vario Lama, which is 8 feet long. It's just a few inches smaller than the turbine version. For some reason, the tail boom is shorter by one section of tubing compared with the turbine fuselage. Go figure.

I power the beast with 4X6S1P 5350mAh LiPos, configuring it as a total of 12S2P at 10,700mAh. I'm using an AXI 5345/14, turning 930RPM at the head, and I get 14 minutes with this setup. It uses a 3-bladed head with 875mm blades, and has a 3-bladed tail. With all the goodies added, and some lead weight to simulate the rest of the goodies to BE added, it comes in at 36 pounds. At 25 pounds, it flew with an Actro 32-4 motor very comfortably. At 36 pounds, the Actro gets too hot and lets the magic smoke out. Best not to do that.

I'll try to remember to dig up some photos. It's flying, but all the cosmetic work needs to be done to it. At the rate I'm going, that might happen within the next 3 years.

Joel-
12-03-2008 09:49 PM
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tow cobra
Senior Heliman
Location: Riverhead, NY

My Posts This: Topic  Forum		Wow. Sounds incredible.

Now that I have converted my Chinook to Electric after two to three years of getting nitro/oil all over it, I am very tempted to try to convert one of my larger gassers to electric as it is just a much simpler means of power to deal with. The lack of noise and mess is really something in these scale helicopters.

My two larger scale birds are the Vario R-22 and the Cobra (in my gallery) but I fear the cost for electric conversion and batteries would be prohibitive.

The cost for the Chinook conversion was very reasonable and the only stumbling block was getting a motor mount which Turbinator was able to make for several of us. The rest you just buy off the shelf.
12-04-2008 02:07 PM
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		FYI - The mechanics in my Lama are the same R-22 mechanics that you have.

Darrell Sprayberry made me a motor mount. The motor itself was $240. The speed controller was on the order of $350 (Power Jazz), and the batteries were close to $900. It does add to the expense, but I keep finding that it's worth it. Plus, you can share your batteries with other helicopters to help spread the cost out. I'll be using the same batteries in my Air Crane... If you didn't mind swapping ESCs, you could save money there, too. I find that i'd rather leave the ESC in the model because it is convenient, but given the price of these things, maybe it's worth the hassle to swap a few wires now and then?

Joel-
12-04-2008 08:25 PM
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Tandem Rotor Helis Vertol Chinook > Head count on CH46/47 E conversions
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