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ElyQ Vision 50 > Competition Head Fix.
 
 
oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		Hello Everyone.

As you may have read or experienced first hand, we have had an issue with the Competition Model head block being a bit loose on the main shaft even after being fully tightened. Some have chosen to shim the head as I have done myself. But there is a reason for the head being loose, and there is also a fix for it

Problem. The Head Block is made out of Very Thick Aluminum, and the tolerances within the block are just a tiny bit off, almost negligible, anyway this makes for a head that cant be tightened due to a spring effect, strength, and thickness of the Aluminum.

Fix. Very Easy. All you have to do it take the head off the helicopter. Put the bolt through the hole, and tighten it to the Nut, as tight as you can get it. This will Pre load the head block and actually Bend it in, key word (Pre-Load). The problem is that the Bolt is not strong enough to do this when on the Main Shaft. Take the Bolt and Nut off, and slide it back onto the Main Shaft, Insert Bolt and Nut, and Tighten it up Tight. No more Wobble.

I just put 6 very hard flights on this "FIX" and it is still as tight as a drum.

Hope this helps

Craig
10-22-2009 08:51 PM
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rsalazar
Elite Veteran
Location: Florida, USA

My Posts This: Topic  Forum		thanks for the tip
10-22-2009 11:15 PM
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az_heliguy
Senior Heliman
Location: Florence, AZ

My Posts This: Topic  Forum		i think craig hit this fix on the nose... i pulled the shims and did this same thing, but when i used a longer bolt and put a washer on each side when i tightened mine off the main shaft. put it back on and it fits like a glove. nice and tight and no worries. will be spooling up tomorrow morning with this heli, still need to get a screw to plug the backpressure hole on the pipe, other then that, its all done and ready to go
10-23-2009 12:51 AM
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az_heliguy
Senior Heliman
Location: Florence, AZ

My Posts This: Topic  Forum		oh, and one more thing...

thanks for all the updates and help craig
10-23-2009 12:51 AM
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Chris_ch
Heliman
Location: Cookeville, Tn

My Posts This: Topic  Forum		Worked for me also

Just need my programming / set up double checked and and im ready to go

_CH
10-23-2009 01:07 AM
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az_heliguy
Senior Heliman
Location: Florence, AZ

My Posts This: Topic  Forum		mine is already done, just need to get a screw to plug the backpressure port on my mp5 as i am using a ys engine in this one

i also did notice on the build when using the suggested rod lengths from the manual that i was getting binding issues at full positive and full negative pitch, just made some minor adjustments and its all groovy now.

ill try to get the length measured and post before turing in for the night
10-23-2009 01:36 AM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		Glad I could help.

Thanks

Craig
10-23-2009 02:01 PM
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Alexm0324
New Heliman
Location: Atlanta, Georgia USA

My Posts This: Topic  Forum		Head fix

I have tried this method, the shim method and neither have worked as I see oscillation when making maneuvers that involve elevator input. It feels like the head is tight when I rock it by hand, but I guess not.

An engineering student observed on my heli that the slits in the side stop where the jesus bolt goes through the head. This means that there is no room for the jesus bolt to cinch down the head. The solution seems to be making the slits in the side another 2-4mm. I'm waiting to hear back from rcheliworkz about this idea to see if that is something I should or should not do.
10-26-2009 09:14 PM
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az_heliguy
Senior Heliman
Location: Florence, AZ

My Posts This: Topic  Forum		if pre-loading the head has not worked, try using 4 shims... a shim every 90 degrees. you will have to cut the ones under the jesus bolt shorter then the other ones, but this also worked very very well.
10-26-2009 09:17 PM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		I am going to try something else in a couple days. If it works, I will share it with everyone. I found that the Pre loading only lasted me about 6 or 7 flights, then back to Shims. I have a new fix, Lets see if it works out.

Thanks

Craig
10-28-2009 02:37 AM
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Callum
Heliman
Location: Blaby, Leicester, England

My Posts This: Topic  Forum		Hmmm,

Interesting, I have not had the "loose" head block issue, Mine went on the shaft fine,

Maybe a batch issue?

But time will tell after a couple of hard flights tommorow

Cannot wait to actually fly it properly!

ElyQ Rock! - Vision 50v2 - Vision 50 Competition
10-28-2009 04:13 AM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		Callum.

Please let us know how it goes just as soon as you get some fuel through it.

Thanks

Craig
10-28-2009 01:45 PM
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Callum
Heliman
Location: Blaby, Leicester, England

My Posts This: Topic  Forum		Heya All, Good News and some Not So Good news that im quite angry at,

I Managed to get some flying done today, and i must say that the head block has not became loose and wobbly, (flight only last 5 mins)

Bad News, is that the hex adapter has drilled itself into the top bearing block twice! so now i will be on my 3rd bearing block and not even got a tank of fuel completed!,

Quite annoying really since i have no idea if its me building it, or some kind of design fault!

Sigh! really am peed off since i really want to fly it, and now its just another set back and more stress of taking the engine out and clutch assembly to have a look at what is causing the issue,

-Callum

ElyQ Rock! - Vision 50v2 - Vision 50 Competition
10-28-2009 04:36 PM
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Callum
Heliman
Location: Blaby, Leicester, England

My Posts This: Topic  Forum		Okay, in response to the bearing block..

im such a plonker! it was my fault, i had the bearing block the wrong way up all along!

I knew it had to be something at my faulting!

ElyQ Rock! - Vision 50v2 - Vision 50 Competition
10-28-2009 05:14 PM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		Darn it man, I am sorry this happened to you. I wish I would of thought of that. Sometimes the simple things throw us all for a loop. While you have that block out, Take the bearing out and Green Loc-tite it in. Then let us know more about the head.

Thanks

Craig
10-28-2009 05:32 PM
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Callum
Heliman
Location: Blaby, Leicester, England

My Posts This: Topic  Forum		Hehe, Yup. I surprising the simple mistakes you can make throw you off course, I might be able to flip the bearing the right way up depending how much damage the hex adapter has done, if not the then ile have to wait for UK Spares to come in stock sicne the block i got spare was from a good friend that let me use his out of his prototype kit.

Not even clocked 10 mins on the machine and on my 3rd bearing block, must be a world record lmao :P

But Yeah, ile green loctite it in, and keep you all posted about the current head issue,

ElyQ Rock! - Vision 50v2 - Vision 50 Competition
10-29-2009 10:32 AM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		Callum.

I sent you a PM.
10-29-2009 02:28 PM
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deli
New Heliman
Location: Devizes, Wiltshire, england uk

My Posts This: Topic  Forum		What r these shims everyone talkin about?
Do they go between the head and the mainshaft?
Where would i get em from?
11-06-2009 07:31 PM
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deliNew Heliman - Location: Devizes, Wiltshire, england uk - My Posts This: Topic  Forum
I test flew my vision 50 competition last week and it flies great.Ran 7 tanks of fuel through in 2 days. Redline 53 with align pipe worx great
I preloaded my head block just now seems to have worked will test it tomoz.Sprayed ma canopy and it looks fantastic.




11-06-2009 09:35 PM
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oragami
Senior Heliman
Location: Florida

My Posts This: Topic  Forum		I opted to Cut my slots up a bit. Probably about 1.5mm on each side. I then did the pre load trick, and installed. Since doing so, I have logged 25 flights, and the block is still perfectly tight.

Thanks

Craig
11-06-2009 09:50 PM
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ElyQ Vision 50 > Competition Head Fix.
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