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Old Mar 03, 2009, 01:27 PM
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Terry Rigden's Avatar
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Racer

That's a nice clear review well done and you heli looks great too . What is the weight in with the new body ?

Regards

Terry
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Old Mar 05, 2009, 09:41 AM
Full Scale Piper Cub Driver
Piper J3's Avatar
Hinckley, Ohio
Joined Nov 2008
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Possible Solution for mCX Center Shaft Bending Problem...

I have found 100 pcs of hardened drill rod blanks that are .047 dia. x 3.75 L ground perfectly straight which can be used for mCX center shaft. Center post of heli will have to drilled 0.007 oversize for new shaft - original center shaft is 0.040 dia. The next step is to either adapt original mCX plastic hub or source an aluminum or plastic after-market hub to adapt to new shaft. As fff indicates, it may be difficult to disassemble original mCX center shaft to save plastic hub. Here is current thinking… I have the hardened shafts in-hand. Is there someone in the mCX fraternity that can injection mold a new plastic hub or CNC an aluminum hub? Does anyone have access to rapid prototyping equipment? Maybe we can do a joint effort and end up with a stronger lightweight design. Anyone interested should advise thoughts on how to accomplish this task.
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Old Mar 05, 2009, 09:57 AM
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Hinckley, Ohio
Joined Nov 2008
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Anyone know where I can get aluminum hub???

Does anyone know where I can get aluminum hub that is out-of-stock at Helihobby?

Lightning Power CNC Aluminum Hub for Blade MCX $14.99 PART#LP-U0101

This is the CNC aluminum rotor hub for the Blade MCX designed by Lightning Power as a drop in replacement. This solves a problem some have experienced with the stock plastic rotor hub breaking with the slightest of impact on this otherwise robust little helicopter. The CNC aluminum rotor hub is a perfect addition for MCX enthusiasts. This is one of many innovative solutions for the MCX by Lightning Power.
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Old Mar 05, 2009, 12:07 PM
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Wausau, WI
Joined Mar 2009
633 Posts
Can anybody with the MIA kit or just the carbon canopy answer a quick question?

Is the carbon canopy any more durable than the stock one? I know it's not real carbon fiber, but is it thicker or more rigid at all? I already have a few dents in my stock canopy after my first day of flying.
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Old Mar 05, 2009, 12:47 PM
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Rickn816's Avatar
Lawrenceville, GA
Joined Nov 2007
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Quote:
Originally Posted by MicroJago
Can anybody with the MIA kit or just the carbon canopy answer a quick question?

Is the carbon canopy any more durable than the stock one? I know it's not real carbon fiber, but is it thicker or more rigid at all? I already have a few dents in my stock canopy after my first day of flying.
It is vacuum-formed just like the stock. Same weight of sheet plastic. I can't say whether or not it is signifcantly stronger. It is smaller, and therefore a little lighter.

Rick
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Old Mar 05, 2009, 08:54 PM
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bradleyd's Avatar
Ontario, Canada
Joined Feb 2008
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Quote:
Originally Posted by Piper J3
Does anyone know where I can get aluminum hub that is out-of-stock at Helihobby?

Lightning Power CNC Aluminum Hub for Blade MCX $14.99 PART#LP-U0101

This is the CNC aluminum rotor hub for the Blade MCX designed by Lightning Power as a drop in replacement. This solves a problem some have experienced with the stock plastic rotor hub breaking with the slightest of impact on this otherwise robust little helicopter. The CNC aluminum rotor hub is a perfect addition for MCX enthusiasts. This is one of many innovative solutions for the MCX by Lightning Power.
Not the same one, but New Era Models also makes one, although theirs is 5 bucks more:
http://www.neweramodels.com/item.cgi...=&part_id=9814

It is actually a split design for ease of seating the flybar with what looks like nylon screws for fixing.
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Old Mar 07, 2009, 02:24 PM
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Malta
Joined Feb 2009
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Just received a couple of 'aluminum' headed inner shaft from ebay. It is part number MCX40X06 by www.xspede.com. Seems identical to pic posted by Piper J3
Highly unrecommended !!!! Very difficult to fit, loads of TBE and vibration. Tried both of them to be sure and at the end I need another flybar and outer shaft. Spent 30$ on cr*p.

Found out that I actually bought 2 of these yet at 15$ each. http://www.hobbyetc.com/cgi-bin/sear...CX40X06&got=no
Yet not worthwhile even if they were free!!
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Old Mar 07, 2009, 06:13 PM
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Piper J3's Avatar
Hinckley, Ohio
Joined Nov 2008
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Skyliner65 Just received a couple of 'aluminum' headed inner shaft from ebay. It is part number MCX40X06 by www.xspede.com. Seems identical to pic posted by Piper J3
Highly unrecommended !!!! Very difficult to fit, loads of TBE and vibration. Tried both of them to be sure and at the end I need another flybar and outer shaft. Spent 30$ on cr*p.

This forum tells me you are 7878 km away from me. At first I thought maybe I'd drive over and pick up your aluminum hub center shafts, but alas, distance is a little too great... I still think the aluminum hub with my hardened slightly oversize shaft will work. Maybe someone who has similar experience as Skyliner65 will be willing to donate an aluminum hub for experiment. PM me if interested in collaborated effort.
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Old Mar 08, 2009, 12:16 AM
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Southern California
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Just wanted to say thanks for the good words Fanfold and Piper. We will keep working on Innovative products and listening to all you have to say about the hobby. Keep the suggestions rolling and we'll keep delivering all we can for you.
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Old Mar 08, 2009, 09:45 AM
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Malta
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Quote:
Originally Posted by Piper J3
[B]

This forum tells me you are 7878 km away from me. At first I thought maybe I'd drive over and pick up your aluminum hub center shafts, but alas, distance is a little too great... I still think the aluminum hub with my hardened slightly oversize shaft will work. Maybe someone who has similar experience as Skyliner65 will be willing to donate an aluminum hub for experiment. PM me if interested in collaborated effort.
Very true, yet the hubs arrived from the US so should not be very far from you. Driving here could take a while yet you are more than welcome.

The shaft hole could be widened due to hub made in aluminum.
The part where the little screw is could be removed as I cannot see how the flybar could separate. Hub head is very strong compared to the flybar, so chances are that the flybar would snap in a collision.
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Old Mar 08, 2009, 10:46 AM
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Chicago, IL
Joined Nov 1999
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MD 500 body weight?

Quote:
Originally Posted by Terry Rigden
Racer

That's a nice clear review well done and you heli looks great too . What is the weight in with the new body ?
I finally got a micro scale, and weighed the Huey body. It came out to 5.3 grams. Then I weighed the stock body, tail fin and boom (all of which were removed when I put the Huey body on). 2.1 grams. So the difference was a grand total of 3.2 grams. Doesn't sound like much, but rtf the mCX is only 25.8 grams, and that 3.2 extra grams takes a great flying sport heli and turns it into a slow response, 40 seconds of airtime machine, with the gyro losing all function the last 15 seconds or so.

The fact that the MD500 body has the color molded in should really help, I think the paint is what did my Huey in, but still want to know the weight difference with the MD500 mod.

I wonder if I can get 3 grams out of the frame somehow...
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Old Mar 08, 2009, 10:58 AM
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Terry Rigden's Avatar
UK, Bedworth
Joined Apr 2004
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I wonder if there is more to it than just weight.

My Hillercopter body weighs 2.1 gram and the flight characteristics and duration are unchanged.

The Huey body weight 1.7 grams and the flight duration is down from 9 minutes to 6.5 . The model is much less stable in the ground effect

My best guess as to why is that the wider Huey body disturbs the rotor downwash more making it turbulent as well as adding more drag. This put the hovering current up and the turbulence made the ground effect less predictable

Any better ideas ?

I've gone back to the standard canopy the Hiller is unpleasant to look at and the Huey is unpleasant to fly

Regards

Terry
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Old Mar 08, 2009, 11:42 AM
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Chicago, IL
Joined Nov 1999
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Terry -

Interesting thoughts, they make a certain amount of sense. I had to move the battery WAY forward to get it to balance, even then I had to put a lot of forward trim in, that probably isn't helping, either.

How in the world did you get a Huey in at 1.7 grams? That's lighter than the stock sport body!

Where did you get the Hiller? Do you have a photo? I'd like to see it.
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Old Mar 08, 2009, 12:33 PM
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Piper J3's Avatar
Hinckley, Ohio
Joined Nov 2008
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Improvement for Center Shaft

Skyliner65
The shaft hole could be widened due to hub made in aluminum.
The part where the little screw is could be removed as I cannot see how the flybar could separate. Hub head is very strong compared to the flybar, so chances are that the flybar would snap in a collision.

Based on your experience I am leaning away from aluminum hub in preference of plastic. I think now I will try to remove shaft from stock plastic hub or find source for making new plastic hub for the hardened shafts I have on hand. It would be great if we can find someone who can do prototype plastic injection mold.
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Old Mar 08, 2009, 12:33 PM
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Terry Rigden's Avatar
UK, Bedworth
Joined Apr 2004
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The huey is a paper one from the fiddlers green plan printed at 80% on standard paper.
The Hillercopter is from the same source but printed out at 120% and widened . I think its too big and maybe 110% would be better. here is a picture of the brute. Oh and the weight included the 0.6gr nose weight added to keep the gyro happy

Terry
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