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HomeScaleAircraftHelicopterScale Model RC Helicopters › Scratch building a 1/6th scale AH-56 Cheyenne
01-25-2010 02:09 AM  8 years agoPost 221
Jim Ryan

rrNovice

Cincinnati, OH

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Cheyenne 450 Flight Video
My friend Don Belfort and I went to an informal indoor fly in Dayton today, and he shot a short flight video of the Cheyenne 450 mechanics. Nothing fancy here, and we were a bit constrained on space, but at least it shows the heli flying with the compound tail. I didn't use prop thrust owing to the tight airspace, but as you can see, the prop in flat pitch causes no adverse handling characteristics.

http://www.youtube.com/watch?v=seo3k8Hu0-Q

Jim

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01-25-2010 02:28 AM  8 years agoPost 222
chuck4040

rrApprentice

Kirkville, NY Syracuse Thunderbirds

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Jim Ryan that looks fantastic - look forward to seeing your progress.

Invertix

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01-25-2010 04:16 AM  8 years agoPost 223
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Jim that looks great!

After having a long discussion with Butch Wellmaker on the phone today, I have decided to go with electric power for my Cheyenne. He has had great success with his gorgeous Sikorsky S-76 as seen here on RR and if you have not seen the video of this bird in the air you are missing something indeed!

I just placed an order for the new Scorpion HK-5035 500 KV motor. It is a 12s beast putting out a max 7100 watts at max 160 amps that is a whopping 9.29 HP for 5 seconds and continuous output at 5400 watts and up to 120 amps or 7.1 HP Along with the fact that Lipos are coming way down in price it just made sense.

I also bought two Turnigy 6s 25c - 35c 5.0 amp lipos for $54.95 each from a dealer a couple of weeks ago. I tested both packs as received and the cells were less than .01 apart. After a full balanced charge and a 20 min rest I rechecked them..... perfect on all cells; voltage and balance. Then I tested them under load and again perfect. These two batteries are going into my Actro 32-4 powered Seaking with Vario Skyfox Mechanics and five bladed head and tail. I will get 4 more of these for my Cheyenne when she is ready and run them at 44.4v and 10amps and see how they perform.

Cheers

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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01-25-2010 04:53 AM  8 years agoPost 224
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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wow!!! how cool is that eh? electric over a turbine. i am confident you made a good move there as butch proved with his s-76.

drive a rotary, fly a rotorcraft

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01-25-2010 05:44 AM  8 years agoPost 225
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Well I really wanted to go with the turbine, but Helicopters in general are kind of frowned upon here in my area, and turbines even more at some of the fields, due to the very dry conditions here in Virginia Beach during the summer. I sent an email to a local club president that has a couple of guys that fly turbines off of a US Navy aux landing and practice strip where they meet to fly. Because the strip is used by F-18's on some weekends you don't get much time in for turbines. Moreover the lack of a response kind of tells the story. I am going to try and contact him one more time tomorrow just on the off chance that it would work out but I think I already have my answer. So, it looks like I will have to let the turbine idea go for now................... But, with what I have seen Butch do with the large electric S-76 is very encouraging.

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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01-25-2010 08:58 PM  8 years agoPost 226
bwellmaker

rrKey Veteran

Long Island

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Right On, Right On, Right On,

Good choice for sure.

The Peka system in my Scale Jet 76 has made a believer out of me.

ePower Baby!!!

Butch

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01-25-2010 10:54 PM  8 years agoPost 227
twguns

rrVeteran

Indianapolis, IN

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Richard, I don't know how much the 76 of Butch's weighs, but I know that it sure seems to fly very nice from the videos I have seen..

That said the Indy Helis Apache is 35#'s and they are now rolling them with their 4 bladed head & 800mm blades on 10s E-power...

That's with a CC esc and AXI motor and their own mechanics, very thin and very rigid..

bigTim

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01-26-2010 12:15 AM  8 years agoPost 228
bwellmaker

rrKey Veteran

Long Island

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twguns,

Thanks for the comments on my 76 flight vids.

My 76 is 32 lbs. 3 lbs are ballast in the nose. At this time, there is no cockpit installed. The hope is to complete the heli with no ballast installed and keep the weight to 32 lbs. As the cockpit goes in, the weight comes out.

My 76 turns 1000mm blades@ 1040 rpm. I am running 2 "nyampdude" 6s 10,000mah 22c packs and getting 8:30 to 9 minutes of flight and using 70% cap of the battery. The batts weigh just under 7 lbs.

The Indy Heli is some really nice stuff. I just wanted to give the specs for the Scale Jet/Peka system as a comparison.

Richard,

Did not mean to jack your thread.

Thanks,

Butch

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01-26-2010 04:13 PM  8 years agoPost 229
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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No issues here Butch,

It is all good shtick so keep it comming.

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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02-11-2010 10:26 PM  8 years agoPost 230
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Sorry Guys,

It has been a little while, but I needed some more surgery. I have done some work and should be posting some pictures soon. Still having a lot of pain in the shoulder during this latest recovery period.

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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02-12-2010 01:19 AM  8 years agoPost 231
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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take your time and recover Richard, the cheyenne will still be there when you are all better. best wishes.

drive a rotary, fly a rotorcraft

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02-12-2010 02:09 AM  8 years agoPost 232
Wayne Parrish

rrVeteran

Apex,NC,USA

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Richard, Take care of that shoulder! Wayne

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03-15-2010 09:06 PM  8 years agoPost 233
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Hey Guys:

Now that the shoulder is getting a little stronger, I have started back on the Cheyenne. I will post some pictures soon of the detailing in progress

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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03-15-2010 09:11 PM  8 years agoPost 234
Viggen65

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Gothenburgh, Sweden

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Very nice that youre back on the right path, keep the pics coming!!

Cheers
Jack

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03-15-2010 10:26 PM  8 years agoPost 235
darrelluh1b

rrApprentice

Dalton Ga

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Richard
I think you are on the right track. You will enjoy electric as I have with my 1/4 41# jet ranger with my own mech.
Darrell

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03-16-2010 01:51 AM  8 years agoPost 236
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Here is my new Scorpion HK-5035 500 KV motor. It is a 12s beast putting out a max of 7100 watts at up to 160 amps. That is a whopping 9.29 HP for 5 seconds. But this is the good part, it will continuously put out 5400 watts at up to 120 amps or 7.1 HP all day . This is stronger than the turbine.

It will go into a scratch built set of mechanics for the Cheyenne.

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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03-16-2010 02:53 AM  8 years agoPost 237
human213

rrVeteran

malibu

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Cheyenne Mechanics
These are easily set-up and optimized for electric.
There are many versions available, 3 or 4 servo ccpm, full oil bath
secondary transmission, will handle over 13 kW power.
German, of course. I will be using these in a 3 meter ship.


michael

Not everything that can be counted counts, and not everything that counts can be counted.

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03-16-2010 03:23 AM  8 years agoPost 238
Carvo

rrNovice

Bay Shore, New York

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Hello Richard and welcome back! I am SO glad you went electric. You will be very happy with that motor for sure. A couple of 40-50C 6s batteries and your good to go! What Speed controller are you going to use?? I would guess it is between Kontronic and Castle Creations. Keep it comming!

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03-16-2010 12:03 PM  8 years agoPost 239
bwellmaker

rrKey Veteran

Long Island

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Nicely done Richard, nicely done.

Glad to here the sholder is doing better too.

Now get to work

Butch

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03-17-2010 04:13 AM  8 years agoPost 240
Hoverup

rrElite Veteran

Golden Gulf Coast - USA

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Richard - You might want to upgrade the bearings in the big bad Scorpion. Some(including myself)have had premature bearing failures if you don't lube the bearings after each five flight period(a Scorpion documented recommendation). This can be a real pita unless you have easy access to the motor.

Cheers - Boyd

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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HomeScaleAircraftHelicopterScale Model RC Helicopters › Scratch building a 1/6th scale AH-56 Cheyenne
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