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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › Double Cats Rotor Heads
10-12-2012 02:11 PM  6 years agoPost 1
Grimracer

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Eau Claire WI

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Any reports out on these?

Im looking for a 5 blade head for my MD.

Thanks

http://wwww.heliscale.com/images/as...or_head_600.pdf

Grim

Michael J Zaborowski

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10-12-2012 02:57 PM  6 years agoPost 2
coptercptn

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Mesa AZ. USA

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Those are the newest version of the Penta head.. Earlier designs were schetchy at best but the new one works pretty well. If I recall correctly the blade grips are 12MM but I think they offered it in 10 and 12mm shaft sizes....Gonna upgrade that MD Micheal??

Home of the "Sea Cobra".....

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10-12-2012 08:19 PM  6 years agoPost 3
Grimracer

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Eau Claire WI

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Yea buddy.. I think so. Im looking at two possibility’s for next year.

One is to rebuild my MD as a civilian machine (not sure this is going to sit well with me..lol) and or, start from scratch with a fuse I have laying around (Jet Ranger) that uses a two blade head.

Right now I’m leaning towards rebuilding the MD.

Man.. we need to get this WIND TO STOP!

From Windy Urban IL.. take care capt!

Grimracer

Michael J Zaborowski

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10-15-2012 05:58 PM  6 years agoPost 4
Grimracer

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Eau Claire WI

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Based on the number of posts regarding this head I would say in general..

Not many are using it
or
its a POS

Im not all that much a fan of having what looks to be a bolt passing thought the feathering shaft.. I would think there is a better way to do this.. am I wrong?

Is this OK?

Grim

Michael J Zaborowski

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10-17-2012 03:26 AM  6 years agoPost 5
Joel Rosenzweig

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Marlborough, MA - USA

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I have their 600 sized 3-bladed head, and it works fine (not the super scale one, just the regular one). The bolt passing through the feathering spindle is large, and works well. No issues with that...

The head is nicely machined, and performs fine. I actually broke the Jesus bolt on my head while doing some experiments, and I learned that I had been putting too much load on it by using some 700mm blades instead of the 600mm blades. ;-) Oops.

I think if you load the head with the right blades, and use a good stabilization system, it will be fine.

More importantly, balance your blades really well.

Joel

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10-17-2012 03:51 PM  6 years agoPost 6
Grimracer

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Eau Claire WI

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Excellent! Thanks Dr Smooth! Good news about the through bolt.

Right now Im looking at the 600 “standard 5 blade head” and a set of Arotech wood blades (I see I can get them from in 550 and sets of 5). That way I can control the look of the blades as well as the balance.
Lets see what happens..

Grim

Michael J Zaborowski

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10-17-2012 10:27 PM  6 years agoPost 7
doorman

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Sherwood, Arkansas

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Blades....
Woodies??? Really??? I know that they would work OK if built correctly BUT...

How about a set of these and you can paint and balance and have blades that will not change weight on you...

http://www.centuryheli.com/products...26-5&pageid=486

Just a thought!!!!!

So did the wind stop yet???

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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10-17-2012 10:35 PM  6 years agoPost 8
Joel Rosenzweig

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Marlborough, MA - USA

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I love this...

Features:

Carbon Fiber Reinforced Fiberglass Blades
Precisely Balanced
Supreme Performance
Blades you can rely on

As if to say, "You cannot rely on any other rotor blade, because they are not advertised as 'reliable'. But these here, yes, these are blades you CAN rely on!"

Well, anyway, no reason those blades would not work.

Joel

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10-17-2012 10:41 PM  6 years agoPost 9
Joel Rosenzweig

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Marlborough, MA - USA

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Two things to note, the heads do not come ready to use as they suggest. They do not locktite the fasteners. They tell you to do this on the parts sheet, but the marketing lingo suggests that's it's ready to fly. It's certainly not.

The other thing to be aware of is that those pitch arms are not keyed to the blade grips in any particular way. They are held on by 3 set screws. I didn't quite trust that, but it's probably OK. I decided to drill a single pilot hole into the side of each blade grip where one of the set screws is located, so that I can screw the set screw into this pilot hole. In retrospect, filing a _flat_ at that intersection would be even easier, and, perfectly robust. We don't normally just use set screws to hold things to round shafts without a flat. This high torque area should be no exception. So do yourself a favor and at least file a flat onto each blade grip for your own sanity and safety.

Joel

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10-17-2012 10:47 PM  6 years agoPost 10
OICU812

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Edson, Alberta, Canada

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Here i thought we were posting some quadcopter with two cat heads, thank goodness not!

...Once upon a time there were Nitros, flybars and frequency pins...

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10-17-2012 11:07 PM  6 years agoPost 11
doorman

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Sherwood, Arkansas

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Too Funny....
Come on Joel, you know that you really want blades you can depend on!!!!
Actually, I hadn't even read that part.... But I have used these for years on the smaller helis and have been quite happy with them..
Good tip on the grip too... I like doing it the way you did, but like you said, the flat would work too...
So is it winter in the NE yet???? Still pushing 70's and 80's here... still not used to this stuff, or flying all year!!!! Tough to find building time when you are flying

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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10-18-2012 03:02 PM  6 years agoPost 12
coptercptn

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Mesa AZ. USA

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Go Ahead Stan.. Rub it in....
Here?; rain, wind....etc. did I mention cold?

Home of the "Sea Cobra".....

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10-18-2012 04:54 PM  6 years agoPost 13
Grimracer

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Eau Claire WI

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Joel. (others)

Im sure I can make the blades work.. (you know me.. strip, glass, paint and what not).. IF it does not work out OK.. to glass blades!

I was wondering about that on the grips.(I had a sneaky suspicion). I too feel pinning them is a good idea... and will do.. Loctite too!

This wind better stop soon!.. I’m heading up to Mundelein IL (my grandsons 1st Bday the 28th of this month). So I will be in Coptercptn’s neck of the woods. Its going to be a (blast up and blast back however).

It’s then on to Midwest Power the 2nd of Nov (High-power Rocket Launch in Princeton IL) and danget.. the wind BETTER STOP!

When I get the parts I will update the post. I did run into an issue (I knew it was coming). I am now allergic to Epoxys. I have had to invest in a personal fresh air system .. not cheap.. (DON’T THINK IT CAN NOT HAPPEN TO YOU!)
Needless to say the reason for me cheaping out a bit on the head. lol

Grim

Michael J Zaborowski

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06-13-2013 06:14 PM  5 years agoPost 14
YoungrrNovice - China - My Posts: All  Forum  Topic

Hi Guys

Here's an video of this rotor head on a Mi24 hind.

Watch at YouTube

Thanks!

Young

http://www.double-cats.com

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06-13-2013 07:33 PM  5 years agoPost 15
Grimracer

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Eau Claire WI

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Young,

What blades and head speed?

Thanks in advance

Grimracer

Michael J Zaborowski

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06-17-2013 02:26 AM  5 years agoPost 16
Grimracer

rrVeteran

Eau Claire WI

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still have work to do.. I got the Turbine in..lol

Im just going to go for it regarding the head..lets see what happens.

Grim

Michael J Zaborowski

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06-17-2013 02:30 AM  5 years agoPost 17
Rckfish

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Little Rock,AR

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Love the turbine... Where did you get it?

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06-17-2013 08:36 AM  5 years agoPost 18
Young

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China

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Grimracer

Hi didn't tell me which brand of blades and turning speed. It almost 1-2 years ago.

Thanks

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06-17-2013 01:41 PM  5 years agoPost 19
Grimracer

rrVeteran

Eau Claire WI

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Hi Paul.

I whipped it out of some balasa I had laying around.

Just about ready to paint this bird.

Grimracer

Michael J Zaborowski

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06-17-2013 02:21 PM  5 years agoPost 20
doorman

rrProfessor

Sherwood, Arkansas

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VERY NICE!!!!!!!!!!!!!
Michael,
That is a sweet looking turbine.."BALSA"??? VERY NICE...

Looks as if the new machine is well on it's way... are we going to see it at the NATS/IRCHA???

I like the motor compartment opening too.. nice touch.. did you do any internal bracing to keep things "tight"???

See you soon.... Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › Double Cats Rotor Heads
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