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Helicopter
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Blade
Other › Looking for a better Main Shaft
11-07-2005 09:14 PM  12 years agoPost 1
smalls777

rrNovice

Euless,Texas

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After going through a few of these, I felt this is an area in need of improvement. I made one out of carbon fiber this weekend and it was straight as an arrow, but one blade strike to the ground (testing purposes) and the shaft shattered, (pretty much knew this was going to happen, but you never progress without trying). So my question is.... Has anyone seen a titanium main shaft for this heli? Or one that may work. I was on helihobby.com and they have a nice one-way bearing set up with a titanium shaft for the Hummingbird. Has anyone tried this set up? Being such a cheap item to replace (5.99), I really don't think many people care about improvement. But I am one who can't stand even a litlle vibration, so I have started to look to improving at least this little part. Thanks For Any Input....

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11-08-2005 12:28 AM  12 years agoPost 2
Balance

rrApprentice

Rapid City, SD, USA

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Don't crash, then it won't bend...

B

FOR SALE Kyosho Nexus .30 and Futaba 8UHF lots of extras

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11-08-2005 01:48 AM  12 years agoPost 3
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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exactly.
ever try CAREFULLY bemding them back? i bend my stock one, and i'm still using it, works like new, just have to be careful to to break anything else in the process.

Shawn
Team Leisure-Tech
Team HelixRC

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11-08-2005 03:45 AM  12 years agoPost 4
Balance

rrApprentice

Rapid City, SD, USA

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Seriously, though...
The needed improvement is our flying skills, not the helicopter. This is one drawback of the Blade I have observed: It is so cheap and cute and cheap to rebuild that nobody takes it seriously. I remember when I learned on my nitro, I was scared to death to crash. I knew it could be dangerous to me and my audience, and I knew it would cost tons of money and time to rebuild. So I learned to fly without crashing. Crashes happen, but they should only follow hours of successful practice. If you are crashing more than you are landing, then something needs to change, IMO. I am guilty of the same thing on the Blade. I used to fight my Nitro to the dirt to correct bad situations, and recovered from almost every one. With the Blade, I found myself watching it hit the dirt, and after about the 6th time, I knew it was time for a change. Part of my problem was radio related, and because of this my Blade is currently at Horizon being repaired, but my point remains:

Why should anything on a helicopter ever be designed to survive a crash, other than the electronics?

The point is to learn how to fly without crashing, not to build the machine so tough it can take a 200-foot power dive into the ground, right?

The main mast on the blade is designed perfectly for strength in flight, and is cheap and lightweight. If you make one of some indestructible material, then what do you expect to take the shock of a really bad crash? The frame that holds the mast will be next on the list. Not so cheap anymore. Sure, you won't have to replace the main shaft anymore, but you will be buying frames, bearings, main gear, etc...

If you don't like the vibration, then replace a bent main shaft, and fine tune your balance of the heli elsewhere, and LEARN TO FLY. We need to get back to the basics, and not worry too much about the upgrades that will make the machine stronger.

I don't mean to make a lecture out of this, and I am directing it at myself above all others. No part on any helicopter (even [ESPECIALLY] full size) was ever designed to be reused after a crash. I worked for a guy who owns a flies a full size. He told me about a time he was parking it in the hanger, and the tip of the blade just barely brushed the leading edge of the hangar door. The heli was grounded for a week while they took the blades down and checked everything out and rebalanced them. The machine is built for flight, nothing else. Building anything stronger or heavier than what is needed to sustain safe flight is a waste.

Forget about upgrading the mast. It is just not necessary.

Good flying!!

B

FOR SALE Kyosho Nexus .30 and Futaba 8UHF lots of extras

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11-08-2005 12:54 PM  12 years agoPost 5
Graybug

rrApprentice

Melbourne, Florida

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Smalls777,

I'll offer a direct answer to your question that I think worth considering.

I replaced my Blade CP stock shaft & main gear with a Century One Way bearing gear and (separate) shaft. That shaft must be tougher because I've had several crashes and not had to replace the main shaft yet. Mind you, I'm quick to cut off the engine before or very shortly after contact with terra firma, so I minimize the likelihood of a bent shaft and the number of broken parts, 'cause ANY shaft will bend given enough force. (Hence all the good advice above...work on not crashing plus train yourself to cut off the engine quickly when a crash is imminent.)

Check this thread for the details on making this mod: http://www.runryder.com/helicopter/...century+one+way

Graybug


If something hasn't broken on your helicopter, it's about to!

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11-08-2005 01:41 PM  12 years agoPost 6
t.edwards

rrApprentice

Lake Geneva, Wisconsin

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Graybug's got it. The one-way brg&gear is a neat upgrade and the Hummingbird shaft (use the one for the elite) seems to be better material and hardened. I use the one-way setup but make the shaft out of O-1 tool steel and harden them. Never bent an oem shaft but have done a good job of taking teeth off of the gear. Happy flying, Tom

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11-08-2005 04:07 PM  12 years agoPost 7
smalls777

rrNovice

Euless,Texas

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Thanks. Well rehearsed Balance... Actually, your right we need not crash. But I am also one of those idio.... I mean really creative people who always tinker and try to make things better. I have gotten really good about low crash count, considering this is only my first month. I crash maybe once a week out of about 6hrs of flying....UH, I mean hovering.. But When I do crash and it's not that bad and that $@%# rotor shaft bends, I just cringe. So just looking to improve, flying skills and parts. Thanks for all the advice. Thanks to Gray also for answering my upgrade question...

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11-09-2005 01:46 AM  12 years agoPost 8
Balance

rrApprentice

Rapid City, SD, USA

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Very good, smalls!!

It takes me a while to get my point out, sometimes. Sorry for that.

If the upgrade can solve more than one problem, then it is well worth it, i.e. one way bearing (auto/approach capability), stronger, etc.

Tinkering IMO is GREAT, but it must be for ALL the right reasons!! If it satisfies your desire to tinker, then you need no other justification!!

Good flying!!

B

FOR SALE Kyosho Nexus .30 and Futaba 8UHF lots of extras

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11-09-2005 02:02 AM  12 years agoPost 9
Balance

rrApprentice

Rapid City, SD, USA

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My apologies!!
I reread my post, and now looking at it from a different point of view, I realize I sound like a know-it-all idiot trying to make others believe my way is the only way. Certainly not my intention.

Smalls was looking for an upgrade, not a lecture on flying skills, and I had nothing to offer.

I am truly sorry.

Graybug, you provided some very useful information in a most appropriate manner very well placed. Good work.

B

FOR SALE Kyosho Nexus .30 and Futaba 8UHF lots of extras

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11-09-2005 04:19 PM  12 years agoPost 10
smalls777

rrNovice

Euless,Texas

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No worries, thanks for taking the time. All the more info, all the more better. You are very informative. Keep on flyin'.

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11-09-2005 08:31 PM  12 years agoPost 11
Flyboy50

rrApprentice

MA - USA

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Most heli shafts bend if you make a hard landing.

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11-09-2005 09:23 PM  12 years agoPost 12
Wa11banger

rrElite Veteran

Huntsville, Al

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I am more concerned with getting NIP ones that arent prebent.. The quality of them is very poor.. I am one of those that dont take it seriously I crash it fairly good and would love for the main shaft to be straight when i bought it.. Even NIP have a slight wobble to them.. QC on the stock parts would be greatly appreciated

Do a run out test on one.. They are no where near straight.

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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11-09-2005 11:42 PM  12 years agoPost 13
c mark smith

rrApprentice

Mt Vernon, Indiana

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I've run the heli minus the complete head with my straightened shafts and with one new one.

No wobble.

A bunch of the wobble comes from a slightly loose fit of the hed, plus the ehad doesn't go on the shaft very far.

Used heads are wobly too as the shaft crosshole gets wallowed out a bit.

I'm using paperclips for the drive rod,,,,,,,,,

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11-10-2005 03:28 PM  12 years agoPost 14
smalls777

rrNovice

Euless,Texas

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Just bought a new head and main gear shaft last night and that $^^#% was already bent! Bad packaging.....? Well, I just trim it to counter act the wobble, but it is frustrating. I'm looking into ceramics now. When I made one out of carbon, the best part was how straight it was. I mean blindingly straight. I put it in a dremel at high speed and it barely moved. You can't do that with the stock one, ACTUALLY DON'T DO IT! (DANGEROUS), funny though.... Well, I'm going to do more experiments and i'll definately post my results on ceramic. Good or Bad.
Keep On Bendin'.

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11-12-2005 06:03 AM  12 years agoPost 15
docloc

rrApprentice

WI, Osceola

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I have bent the Blade main shaft serveral times and straightened it to an acceptable minor wobble. I take the two main shaft bearings off the heli, slide one of them on the shaft about 1/8 inch or so below where the set screw for the collar makes it mark on the shaft and the other near the gear and put the assemble in a small table vice, spin the shaft until the bend is near one of the vice jaws, using a flat blade screwdriver overbend it towards the other jaw, spinning the gear/shaft until it appears true again. The bearings only need a slight pressure to hold them or binding will occur. I have one of the small vaccuum vices that I use to do this. I am using the Hummingbird Elite main shaft and the regular Elite plastic gear now DOC.

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11-14-2005 03:10 AM  12 years agoPost 16
BladeBoy

rrNovice

Sarasota, FL

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Main Shaft
Ya those things suck on this heli. Im a complete noob and have only flown like 5 times but the only bad thing on this heli is the main shaft (and the tail wont stay straight) but i have had 2 now and bent another one today for my 3rd big crash (one time i hit a car, then a fence, and then today i hit a big ass tree!!!) lol its fun but i wish the shaft wouldnt bend so easily. I might use a vice grip to try to straighten it...??? bad idea????

Read The Manual (Duh)

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