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Home✈️Aircraft🚁Helicoptere-BladeOther › Main Shaft options
01-13-2006 05:48 PM  13 years ago
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futuramille

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SC USA

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Main Shaft options
Has anyone come up with a better (harder steel, titanium etc) main shaft and gear combo for the blade CP or HB CP2?

Has anyone ever tried a carbon fiber rod for a main shaft?

I've used one for a tail shaft and it worked really well but it didn't have pin holes drilled in it either. It would flex but it wouldn't bend permanently.

that main shaft is 2.5mm on the blade....I'm I right?

Maybe if I had better luck getting them straight again....any tips on how best to straighten bent BCP main shafts?


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01-13-2006 06:40 PM  13 years ago
akerkhof

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Indianapolis, IN

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How do you do it? I had success with a friends main axis by "pinching" it between a vice grip until I had pressed all the kink out.

There was a thread about a guy ordeirng lengths of drill bit and using that for a main shaft, which would be a heck of a lot tougher. I've thought about doing that so I could use the century shaft and autorotation gear, but I don't have a drill press to make the holes right.

-- Aron in Indiana -- http://www.neolith.org/cp2 -- Honeybee CP2 Resources
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01-13-2006 07:12 PM  13 years ago
crazhorse

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texas

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I replaced the stock main gear on my CP2 with the one way for the hummingbird and just used the stock shaft.... works fine had to adjust the servo links to the swash out a bit though, the century main gear sits down further than the CP2's does.
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01-13-2006 07:15 PM  13 years ago
rand1960

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Colorado

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I make mine out of 3MM A2 drill rod works greatShogun 3DX SE Shogun V2 Blade cp T-REX XL Raptor 30V2
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01-13-2006 07:33 PM  13 years ago
akerkhof

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Indianapolis, IN

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crazyhorse: I thought you had to mod the main shaft pin to make that work?
-- Aron in Indiana -- http://www.neolith.org/cp2 -- Honeybee CP2 Resources
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01-13-2006 07:38 PM  13 years ago
futuramille

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Rand1960,

Tell me more please. I thought the shaft was 2.5mm? If your using 3mm than I guess I was wrong. So how do you drill the pin holes? You must be using another main gear...which one?
Where do you get the 3MM A2 drill rod?

I was eyeing the esky one way bearing and gear...

thanks for all your replies


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01-13-2006 07:40 PM  13 years ago
crazhorse

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texas

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aron,

I did grind the lower pin down some so it would fit in the century gear.
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01-13-2006 07:49 PM  13 years ago
akerkhof

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Ok, I thought maybe something had changed. I'd like to fabricate my own shafts like Rand1960 there, and use 1mm wire for a pin. I'm not confident in my griding skills, but if I had access to a drill press I think I could do that part.

Esky has a one way bearing gear? I thought that was King/Cool only???

-- Aron in Indiana -- http://www.neolith.org/cp2 -- Honeybee CP2 Resources
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01-13-2006 07:52 PM  13 years ago
crazhorse

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texas

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I just ground lower pin down with my dremel while holding it with a pair of needle nose pliers.
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01-13-2006 07:59 PM  13 years ago
futuramille

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I saw the alum gear hub and assumed...

I guess its not one way....hmmmm...bummer

ah yesss....Rand1960 has his own machine shop. Nice!!


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01-13-2006 08:12 PM  13 years ago
futuramille

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Are you talking about this one with one way and titanium shaft.

http://www.helihobby.com/cgi-bin/ad...rid=6460707&;product=IP5991%20Hummingbird%20One%20Way%20with%20Gear%20and%20Titanium%20Shaft&price=42.00&qty=1&return=www.helihobby.com/html/hummingbird_upgrades.html&units=1


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01-13-2006 08:49 PM  13 years ago
rand1960

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Colorado

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Yea im using the century gear,In fact Im going to start buiding a kit for the oneway set up!The inner hub is made out of aluminum with a fan spoke set up so it will draw air through the canopy to help cool the good stuff.The outer gear is deltron plastic,so if you ever strip a gear thats all you have to replace.Im toying with the idea of offering differant tooth counts to.It will be a compleat kit shaft,gear,bearing,pins,and it will be a direct fit mod to the cp.Once I get the brouch to the cut the gear I will start building the kits.Price will be under the cost of the century gear.

A2 drill rod can be bought at most machine tool outlets,$2-3 for 3 ft.AS far as building it at home with a drill press that would be tuff!The holes have to be dead center of the shaft, or you cant get the pins in.And a .040 drill bit is very fragel.you have to spin it around 3kRPM and have zero movment in the set up.

Yea owning a machine shop is great when Im building heli parts or parts for my racecar, Sucks the rest of the time
Shogun 3DX SE Shogun V2 Blade cp T-REX XL Raptor 30V2
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01-13-2006 08:52 PM  13 years ago
akerkhof

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Indianapolis, IN

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Will this also fit the HB CP2, as I've heard there is some differences in shaft length. Sounds like an awesome project, and I'd definately be a customer should they fit the honeybees.

A friend of mine owns a EDM shop that I'm always trying to talk into making heli or motorcycle parts for me. But no, he's too busy making engine parts for Rolls Royce. Sheesh!

-- Aron in Indiana -- http://www.neolith.org/cp2 -- Honeybee CP2 Resources
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01-13-2006 08:56 PM  13 years ago
futuramille

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pm me when you get one of these outfits for sale Rand1960...I'll bite for a couple sets to start.

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01-13-2006 09:38 PM  13 years ago
rand1960

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Colorado

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Yea the shaft Is drilled at the top for the Blade or the CP2.Shogun 3DX SE Shogun V2 Blade cp T-REX XL Raptor 30V2
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01-13-2006 09:55 PM  13 years ago
futuramille

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SC USA

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Let me guess, with a .040 drill bit at 3k rpm held with 0 movement.

thanks for the info Rand1960. It's good to know even if I can't get it done at home.

hey it was worth a shot asking the question right?

thanks everyone for the feedback.


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01-14-2006 09:48 PM  13 years ago
t.edwards

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Lake Geneva, Wisconsin

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Main Shaft
I've been making mainshafts out of O-1 oil hardenable drill rod on my 40 yr old craftsman drillpress that wouldn't make 3000 rpm headspeed on it's best day. The only real trick is to start your holes with a center drill so your 1mm bit doesn't walk around, and use a real drill press vise (~$25.00 for a small one). I use 1mm colbalt drill bits (~$1.25ea). You can make mainshafts without having big $ in equipment.

Rand1960, Smaller tooth counts would be great so we could run AXI outrunners. Frame won't accomodate a large enough pinion with a 140t main gear. Happy flying, Tom
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01-15-2006 06:26 PM  13 years ago
CRB68

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Tombstone, AZ

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I have been using the Century one-way for a long time in my CP 2, 3D pro, Blade, Belt drive tail/frame conversion kits. If you want a mainahaft to use with the Century one-way, just use the 3D Pro shaft. May have to fiddle a bit with the links from the servos, but it works great and you even get the right size pins for it. Cost is very reasonable also.

PJ
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01-15-2006 11:40 PM  13 years ago
t.edwards

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Lake Geneva, Wisconsin

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The Hummingbird Elite Mainshaft is the one that is a drop in for the Blade CP with the one way gear.
Happy Flying, Tom
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01-16-2006 11:22 PM  13 years ago
floodo1

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Fresno, CA - USA

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t.edwards- do you have the part number?
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