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Tandem Rotor Helis Vertol Chinook > Head count on CH46/47 E conversions
 
 
dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum
This is just curiousness on my part, but who out there has or is in the process of converting the Hirobo CH46/47 from nitro to electric. It might be a good thing to know for help, pity or comfort. Maybe a "Hirobo E-Chinook forum" or something like that.
My 47 conversion will be in the air in a few weeks.

Cheers, Doug
08-27-2008 Over year old.
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junkpilot
Senior Heliman
Location: Summer/Alamogordo N.M. ,Winters/ Tucson

My Posts This: Topic  Forum
E- Conversions

Let's just say I'm interested in learning more. Can someone provide a parts/price list of a succsessful conversion (One that has flown and keeps the builder happy).
What kind of flight times are you getting? What are the weights coming in at? Is everyone using three bladed heads? What kind of mixers? What are the negatives? How many fly stock blades? Has Anyone successfully autoed?
I bought a used Vertol several years ago, It had Much loved and much flown by the former owner. I'm considering converting to E-power.
Junkpilot

When you fly JUNK it's hard to tell when you've crashed!
08-27-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum
Contact Richard (avconslt) by PM. He has an excellent guide to convert the aircraft. I'm going with his ideas because it made sense and is flying. There must be 1000 ways to do it however. As far as I can see the power plant is the only changes made by many with everything else as it was. If your AC has mechanical mixing rather than the newer electronic, you can contact Dan (turbinater) because I believe he has one.

Cheers, Doug
08-27-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum
Junkpilot,

I can provide you with a Guide to E-Conversion for Hirobo Vertol/Chinook. We are getting 8-10 minutes of flying with an 8S 3850MAH battery setup! I have not weighed mine but it seems to be about the same weight as the nitro version! The Hirobo Vertol/Chinook only comes with 3-bladed heads! Haven't found any negatives yet, except maybe the cost of the batteries! I do not know how many fly the stock Hirobo wood blades, but they will fly better if you do! I do not know about a full autorotation from altitude, but several have done hovering autorotation, and they say it has plenty of inertia in the blades! If you will PM me with your email address I will send you the PDF file of the Guide!

Richard

o
08-27-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum
I LOVE my converted Vertol. Hardly flew it when it was glow but fly it often now. I have the older model, mechanically mixed, 4 servos with 3 gyros. It is different to fly from a normal helie mostly because of the 3 blade heads, the normal multi pitchy syndrom. I still fly my original wooden blades, would LOVE to try a carbon fancy set but I hear they are likel 2-300 a head, pricey. But having experience with larger 4 blade multi heads I know blades make all the difference, I fly OF on them, they are heavy and act like their own gyro when spinning. I also contemplated trying a Helicommand Rigid but have yet to find a used one as 600 on one of those is as bad as 2 blade sets at 2-300 a set!! It would be different laying out the cash following a known success story but being the geanie pig makes it tougher to part with the cash. My E-Vertol is lighter then nitro version with .46, pipe, radio battery and full load of fuel. Just doing the swap from a flying glow model to E-converted my hovver point was below half stick at same rotor RPM which tells me the helie had lighter take off weight with out even putting it on a scale. I'm getting a solid 10 minute flight on 3850's and putting 33-3400 mah back into the battery after flights so I'm not discharging them too deeply. I have a set of 5000's which go almost 13 minutes safely. I would start with teh 5000's, they are only slightly larger and heavier and put out a flight time almost equal to a tank of glow with the .46, but no noise and no mess!!! I'll be starting a batch of mounts soon, put requests in if your thinking about getting one that way you won't have to wait for one.
08-28-2008 Over year old.
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junkpilot
Senior Heliman
Location: Summer/Alamogordo N.M. ,Winters/ Tucson

My Posts This: Topic  Forum
CH-46 E-conversion

First let me thank everyone that responded to a post I didn't start!
And to dcloukota for starting the thread; thank you!
I've been planning to something with this heli for years now and now I have the push I need.
My e-mail is freeman.michel@gmail.com I look foward to hearing more from all of you.
Junkpilot

When you fly JUNK it's hard to tell when you've crashed!
08-28-2008 Over year old.
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum
Vertol Coversion.....

I am in this bunch too!!!!! I flew mine all last season on nitro and the two guys that posted above this one "FORCED" me to do the conversion, and I am GLAD they did keep hammering me.... BUT, I did mine a little differently... I used the AXI motor and (2) 3700mah 5s batteries in parallel.... I too get a good solid 8 minutes and 9min 40 seconds to ESC cut off, but that is too deep for the batteries...
The constant power makes it a lot easier to fly and you just are more confident in FFF with it.... I am running the stock wood blades and see no reason to buy the more expensive CF blades.... we are not turning high head speeds and the woods track well and make good lift.. I have done some auto's from hover (About 5' and the hang time is just too cool!!!!!
Mine drew a LOT of attention at IRCHA each time I took it up... most people had never seen on in FFF and they all commented on how great it was to be able to hear the blades and NO SMOKE!!!!!! I am pretty sure that you would not be sorry if/when you take the leap!!!!
Good Luck, Stan

Turbinator, I forgot that I was supposed to get back to you with a Helicommand Rigid...sorry... I will PM you....

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
08-29-2008 Over year old.
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dcloukotaHeliman - Location: Glendora, CA - My Posts This: Topic  Forum
I'm sure glad to hear that others out there are very satisfied with the CH46/47 E conversion. I can't wait to get mine going again and dump the noise and smoke. While I'm waiting for the motor mount I'm making the tail ramp open for battery access. It'll be manual, I don't have a spare channel that's slow enough to operate it like Dan and Richard. What have other people done to gain access to the batteries anyway?

My birthday present from me to me was a bunch of electrical parts.... imagine that.

BTW, does any one know how to slow a servo down using the gear channel on a DX7?

Cheers, Doug
08-31-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum
Doug,

Try these people, they have a rate reducer, which will slow down your servo so you can use your retract channel!

Richard

http://www.rcdude.com/servlet/the-RC-Gadgets/Categories

o
08-31-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum
Richard,
Thanks for the heads-up. It will slow the channel to about 6 seconds. Now I have to figure out how to rig the servo on my configuration.



Cheers, Doug
08-31-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum
Doug,

Here are a few shots of how Dan did mine! Hope they help!

Richard



o
08-31-2008 Over year old.
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v22chap
Veteran
Location: Howe, Indiana

My Posts This: Topic  Forum
Count me in ... just getting things around ... but will be quite awhile till I have time to do it.

Larry C ----------Bergen R/C helicopters
08-31-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum
Richard,
Using the hardware in your document, where does the C.G. fall. How far aft do the batteries need to be? Have you had to add any lead weights anywhere?

Cheers, Doug
09-01-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum
Doug,

The batteries are mounted on an angle up, to keep them level when the nose is up at a hover to keep them from falling out! They are mounted just behind the old fuel tank location and just in front of the rear wheels! I located them there so I could get to them when the tailgate is down! I had to put 6 oz. of lead stick-on wheel weights just behind the motor! That made the CG spot on! If you think you can get the batteries out, you could move them forward a little, which would then require a little less weight in the nose!

Richard



o
09-01-2008 Over year old.
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dcloukotaHeliman - Location: Glendora, CA - My Posts This: Topic  Forum
Richard,
Good point abut the batteries falling out. I'll mount them as far FWD as I can and still remove them. I have an idea I'll pass on if it works. Coming along with the ramp, about 75% complete so far. Had I known just how much trouble it was going to be. I'd would have gone with 600Kt tape on the outside! Too far to quit now. Next, mounting of the servo. I modified the AFT gear for future steering.

Cheers, Doug
09-01-2008 Over year old.
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minuteman42
Heliman
Location: Stockton, CA USofA

My Posts This: Topic  Forum
Count me in. I've been hovering my E-con CH-46 for almost a
month now. I just love the quietness and not having to clean up a mess after getting some stick time. I am using 2 8 cell packs of
A123's and am getting a little over ten minutes for a flight. Had a mishap last weekend, and had to replace the main gear, rotor blades and main shafts. On the second run up with the new main gear,( actually it wasn't new, I found it in my parts box,),I somehow or other, broke one tooth.
For the last two days I have been modifying. Replaced the main gear with a beefyer one and put a bearing at the top of the pinion.
My new gear is 87 teeth with a 14 tooth pinion. Haven't test flown it yet, but after running it up at a slow speed, sure do like the
difference in noise, as compared to the old gear.
Have been meaning to get on here and give everyone, my source for
pinion gears and other things. I get mine from MISUMI. They have different sizes with different shaft sizes too.



tandem rotor nut
09-02-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum
I'm not too sure if anyone would be interested in my attempt to add a working rear ramp for a Hirobo CH47 but here it is. First off it ain't easy. The body isn't quite to scale but close. Converting to E-power necessitated me to have easy access to the batteries and this is the method I picked. I'd be interested to see what others have done to add mire detail to the aircraft too.
BTY minuiteman42, I like your H21 (I believe).



Cheers, Doug
09-05-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

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Actually, it is the CH-46 (Vertol) version!

o
09-05-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

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Yup. I ment the one on his gallery, not the post. Sorry. All of them are nice however.

Cheers, Doug
09-05-2008 Over year old.
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minuteman42
Heliman
Location: Stockton, CA USofA

My Posts This: Topic  Forum
Doug: Thanks for the kind words. I was a crew chief on them for about 6 years, shot down in one in Vietnam, and just love the looks
of them in the air.
Hope to have mine flying one of these days soon,



tandem rotor nut
09-06-2008 Over year old.
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Tandem Rotor Helis Vertol Chinook > Head count on CH46/47 E conversions
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