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Zoom › Zoom Stock Main shaft (WOW!..)
12-11-2004 07:15 AM  13 years agoPost 1
iskoos

rrKey Veteran

Orlando, FL

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I try not to upgrade my Shogun to keep the repair bill low.
I have no upgrades on it except the burshless system. I had one crash couple weeks ago and had to replace all the shafts. Flybar, spindle was easy but when it came to main shaft, I said WOW. It was twisted so bad at the washout base(right at where it has cut out for plastic pin) that I had to spend almost 2 hours to slide the washout base out of it.
Then my friend crashed his last week. His crash wasn't that bad but it was bad enough to mess up the main shaft. And the same story again; shaft was twisted almost 90 degree. I had to cut the shaft with dremel tool to be able to take the plastic pin out.
So I am very well fed up with that, and don't want to do it again.
Like I said I didn't want to buy hardened shaft at first, but I may consider it now.
So I want to know; Is this issue(shaft twisting up) happening with steel shaft or NOT?
Is it worth to pay more for steel shaft? I am sure it is going to bend but it may not twist as the stock one does.

Give me some input on this please.

Alex

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12-11-2004 03:12 PM  13 years agoPost 2
copperclad

rrElite Veteran

NY

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hi
the hole drilled the length of the shaft is not so bad , but in combination with the slot it really makes a weak spot in the shaft , steel is going to be stronger but in some ways haveing the shaft fail may spare other parts from damage , may not too , what i have been doing is just running the alloy shaft and replaceing it once its bent , i would be interested in hearing from someone running the steel shaft if it is that much stronger that it doesnt bend , my thinking is that if it just bends a little it may still need replaceing and an alloy shaft would have bent more but end up no more replaced than steel

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12-11-2004 03:56 PM  13 years agoPost 3
iskoos

rrKey Veteran

Orlando, FL

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Yes copperclad. I am sure that the steel one is going to bend too. But my point is that it may not twist and cause that plastic pin to get stuck inside the shaft. So, that way it wouldn't be a pain to remove the washout base.

I am sure there are pilots using that steel shaft. Let's wait to hear from them.

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12-11-2004 04:12 PM  13 years agoPost 4
copperclad

rrElite Veteran

NY

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hi
i see what you mean now , the steel is a lot stronger and will not twist as bad , plus there is the whole range of hard landings where the alloy would have bent and the steel would not have , it's possible the steel would not ever bend to the extent of the problem you just had , as i say i have not ever run one and would be interested to hear from people that have

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12-11-2004 04:31 PM  13 years agoPost 5
BlakeMcBrayer

rrElite Veteran

Georgetown, Ky

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I bent the alum shaft that came in the kit and a second one. I then went with the steel and will NEVER go back to the alum one. I bent the "kit" shaft in a minor tip over and the second in a on the bench mishap. I was adjusting it on the bench a bumped my idle up switch (my esc was set for fastest start up) and went from 0 throttle to 100% and twisted it more than 360 degrees.

I have bent 1 steel shaft in a HARD crash, but darn near total the entire heli, so the shaft was a minor part of the crash. There is something to be said for the alum shaft absorbing engery in a crash and saving other parts. It has been my experence that the spindle shaft becomes the shock absorber with the steel shaft. I have had several small and moderate crashes that would have killed the alum shaft, that the steel shaft has came out of it just fine. In almost all of these situations, I have had to replace the spindle. I had rather replace a $5.00 spindle (got it down to a 2 minute swap) than digging out a bent/twisted alum shaft anyday!

Go steel, I don't think you will ever regret it!

Don't come off the throttle untill you see your GOD!

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12-11-2004 05:22 PM  13 years agoPost 6
copperclad

rrElite Veteran

NY

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hi
yes i'de rather see a bent spindle then main shaft , i was affraid it would come through the side of the frame like a busted connecting rod , and $7.00 for the alloy main seemed ok , but i have to agree it will bend if you look at it crooked

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12-11-2004 06:53 PM  13 years agoPost 7
turboomni

rrProfessor

East of the Equator

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I may be crazy but I replaced the aluminum main shaft with a steel one. There was nothing wrong with the stock one and wanted it stronger because of brushless rotor speed etc. I could almost swear it is smoother with the steel as the vibration running over my head was less not that it was bad before.
Maybe the aluminum shaft also flexes abit if there's the slightest out of balance problem?

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12-11-2004 08:07 PM  13 years agoPost 8
iskoos

rrKey Veteran

Orlando, FL

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Good that's what I wanted to hear. Stock main shaft is $4.99 at heliproz and the steel one is $9.99. So 5 bucks more is not a big deal. I will order steel shaft from now on. Heliproz is hard to beat when it comes to prices. The same stock shaft is $6.99 at LHS here.

I also want to see what Crazykev is using. I know he got lots of upgrades on his zoom, and can't imagine he is using the stock shaft.

Thanks for the inputs guys

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12-11-2004 11:17 PM  13 years agoPost 9
copperclad

rrElite Veteran

NY

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hi
i'm pretty sure kevin is running either steel or stainless steel

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12-12-2004 01:19 AM  13 years agoPost 10
lazerin

rrApprentice

Adelaide, Australia

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What's the spindle shaft?

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12-12-2004 02:48 AM  13 years agoPost 11
BlakeMcBrayer

rrElite Veteran

Georgetown, Ky

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It's the shaft that goes across the top of the head that holds the main blade grips. If you split a grip by removing the 2 small screws, you will see the shaft with 2 bearings on it and a lock nut on the end. If it has any bends in it, well, it give you all kinds of vibrations.

Don't come off the throttle untill you see your GOD!

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