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Zoom › Anyone use the new Bevel gears yet?
10-24-2004 05:28 AM  13 years agoPost 1
czechyour6

rrApprentice

Orem, Utah

My Posts: All  Forum  Topic

Hope to have some Bevel gears on the way from Grand RC, looks like a great idea if they will hold up. I will try these with upgraded boom bearings and see if this gives me a reliable drive.

http://www.grandrc.com/shogun_mod_parts

Blade 130x - DX7s

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10-24-2004 06:43 AM  13 years agoPost 2
JWBurns

rrVeteran

The Lone Star State,​Dallas Texas

My Posts: All  Forum  Topic

My latest kit included these standard.

I have 6 flights on it so far and holding strong. A marked improvement over the original gear as they were worn in two flights.

Mesh was set perfect right out of the box.

No doubt these will last.

Jason

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10-24-2004 07:47 AM  13 years agoPost 3
Ruff

rrVeteran

Queen Creek, AZ

My Posts: All  Forum  Topic

I've had mine for about two weeks now. This is really the first time I've ever got to fly it, as I was stripping the old style gears left and right.

So far so good. I also replaced the boom bearings with a closed-ends bearing instead of the stock crap.

If you can find them in stock, go for it......

Ruff

http://srcha.com

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10-24-2004 05:09 PM  13 years agoPost 4
curlyq2000

rrApprentice

Hayden, Idaho

My Posts: All  Forum  Topic

I use Ultem gears front & rear

My Ultem gears has been in my heli for over 6 months, so many flights I stopped counting.
Plus bevel gears do not solve the front input gear stripping issue,
and no upgraded drive shaft needed every time, when it does finally strip out.

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10-25-2004 02:07 AM  13 years agoPost 5
DaBman

rrApprentice

San Diego, Ca.

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Are either of these gears quieter than the stock? Even with a good mesh the stock gears have that high pitch whine.

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10-25-2004 10:43 AM  13 years agoPost 6
Dexter

rrApprentice

North Wales, UK. Not​England.

My Posts: All  Forum  Topic

Has anyone (other than the manufacturer/vendor) experienced the "Ultem" gears to be any better or worse than the stock gears?

Curlyq2000: I notice your comments are absent from this post:
http://www.rcgroups.com/forums/showthread.php?t=289739

And the latter part of this post:
http://www.rcgroups.com/forums/showthread.php?t=282365

Nowhere here:
http://www.runryder.com/helicopter/...highlight=ultem

Or here:
http://www.runryder.com/helicopter/...highlight=ultem


Do you offer any sort of guarantee with your product? You are always the first on the scene to plug your product, but rarely seen anywhere near to a post reporting issues with it. Any reason for that?

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10-25-2004 11:39 AM  13 years agoPost 7
tisrich

rrApprentice

western NY

My Posts: All  Forum  Topic

As to any warranty, I broke one of my gears during installation and Curlyq2000 agreed to send me a replacement free of charge. It was broken through my fault yet he agreed to replace it. Currently awaiting the part now. I think this is a good thing and would recommend dealing with him.

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10-25-2004 02:10 PM  13 years agoPost 8
Such5

rrApprentice

Grand Haven,​Michigan

My Posts: All  Forum  Topic

Ultem gears, my experience.

Simply put......not good. Original gear about 50 flights, Ultem gears 1. So, let's just say, I won't be buying a second set of the Ultem gears. And No, I did not land in grass, and Yes, I know how to set gear mesh.

Brett

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10-25-2004 04:24 PM  13 years agoPost 9
CRAZYKEV

rrVeteran

Cincinnati,Oh -​U.S.A.

My Posts: All  Forum  Topic

If you are looking for a better gear than Ultem try these guys. I have tons of flights on my blue gears and no problems at all. Can't even tell they are wearing out! I tried the ultem and these are much better.

http://www.microheli.com

If out of stock try:

http://www.modefosheli.com

http://www.grandrc.com

Kevin

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10-26-2004 05:26 AM  13 years agoPost 10
Pipefish

rrApprentice

Curitiba, Paraná -​Brasil

My Posts: All  Forum  Topic

Kev,

it´s interesting that there´s a thread Ultem X Blue gears that shows all

these things about them 2 types of gears AND the guys still buying that

s*** of Ultem.

It´s incredilble!


Rgds

Fear is different than respect !

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10-26-2004 06:54 AM  13 years agoPost 11
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

I am on the original style gear setup and was sent a bevel gear setup.
i haven't tried the bevel gear setup yet because the crap style setup is working fine. Don't takeoff or land on grass!!

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10-26-2004 09:01 AM  13 years agoPost 12
Heli PIC

rrApprentice

Petaluma, CA USA

My Posts: All  Forum  Topic

Summary of my gear failures.

By the way, I log all my flights and all the failures that I have experienced with the Zoom. Here is what I have in regards to the tail drive input gear.

Stock gear failed after 42 flights (>420min); the cause was the broken carbon hexkey.
Stock gear failed again after 11 flights (>110min); it was my fault. I crashed the tail into the ground.
After that, the stock gear had been problem free over 80 flights since I switched to metal drive shaft.

MISTAKE I MADE: SWITCHING TO ULTEM GEAR
The mesh was terrible and it was making too much noise and powder. I thought that perhaps the screws were loose. Guess what, it cracked after I tried to tighten it up slightly. It was a total loss. After less than 10 min of flight, I had to pronouce death to the ULTEM.

BLUE gear has been driving my tail for more than 40min now. It looks so far so good. I am yet to find out its longivity.

Veridict:
Stock gears are fine as long as gear mesh is right.
ULTEM: Substandard part, does not live up to what curlyq2000 claims.
The blue gear seems promising.

I would like to hear what Curlyq has to say and how he flies with his Ultem gears.

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10-26-2004 03:09 PM  13 years agoPost 13
jfitter

rrNovice

Mapleton, QLD -​Australia

My Posts: All  Forum  Topic

I am using the upgraded bevel gears with much success. Motor is a 400DH, CC35, CF blades, steel mast, 9t pinion.

After 2 flights the CF hex broke off - piro landing #20 approx.

I used the old tail rotor hex shaft. Cut in half. Machine it down to 1.4mm dia. and leave 4.5mm of hex for the crown pinion. File a flat near the end to key the glue. Drill 1.4mm dia. into the CF drive shaft. Glue together with really good glue.

CA doesn't work Piro landing #21

I used Scotch 3316 which worked a treat. ensure you use a glue designed to glue composites to metal.

The machining was done on a watchmakers lathe. When drilling the hole up the CF drive shaft, ensure you use a collet chuck otherwise the CF rod will split out.

This mod has been very successful. About an hours work and no tail drive problems since.

"Anything with wings - bolted on or just nearby"
P4000+tray+mode2/shades+hat/kero or methanol

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10-27-2004 02:25 AM  13 years agoPost 14
Spread out!

rrApprentice

cali

My Posts: All  Forum  Topic

CA doesn't work Piro landing #21
LOL.. Thats to funny. Hopefully you have saved it from Piro Landing #22...
The beveled gears seem to be holding up . The input gear is starting to wear. I am gonna get a "Blue" input gear. The beveled tail gears seem fine. I went to the Fountain Valley HP about a week ago and they gave me a free set. They said all the newest Kits come with beveled gears.

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10-27-2004 02:26 PM  13 years agoPost 15
StrangeRanger

rrVeteran

VT

My Posts: All  Forum  Topic

To those of you w/ the bevel gears...is the gear ratio right? I remember reading some of the original DIY bevel gear posts, but the ratio was quite different than stock. Have you noticed any adverse effects? Have have you adjusted your set up to handle the different ratio? Thanks,
j

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10-27-2004 06:54 PM  13 years agoPost 16
czechyour6

rrApprentice

Orem, Utah

My Posts: All  Forum  Topic

I have a Blue front gear ordered, rear bevel gears, and upgraded boom bearings on the way. I will install, fly and post the results.

Blade 130x - DX7s

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10-28-2004 11:29 AM  13 years agoPost 17
gt900uk

rrKey Veteran

Scotland

My Posts: All  Forum  Topic

Surely these will be the correct ratio as it is a factory part now. Im just annoyed i just got my metal tail drive shaft and now will need to get another to go to the bevel gears... Oh well

This Heli Will Self Destruct In Five Seconds!!

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10-28-2004 05:33 PM  13 years agoPost 18
airshares

rrVeteran

Thousand Oaks, CA

My Posts: All  Forum  Topic

Tail Shafts

Are the bevel gears a better way to go than the belt drive conversion? Can we still use the high speed tail shaft upgrade with the EVO bevel gears or do we have to use the stock tail shaft?

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10-28-2004 08:26 PM  13 years agoPost 19
Stefan100

rrNovice

Belgium - Antwerp

My Posts: All  Forum  Topic

tail gears

I just have got the new bevel tail gear system from protech.
They are in stock since yesterday.
I tested them today and they work much much better and are very strong also.
I am sure this is a big step forward in the tail gear problem of the zoom.

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10-29-2004 04:57 AM  13 years agoPost 20
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

I too have the bevel gears in a box for the future ,,BUT my stock gears are working great!!Why? Because the gear mesh IS CORRECT ,,AND I don't fly from grass. You said they "Work much better" IN WHAT WAY?
yOU SAID THEY ARE STRONGER,,,IN WHAT WAY?? TALL GRASS TAKEOFFS AND LANDINGS? WHAT IS BETTER ABOUT THEM OVER THE STOCK GEARS? I'm not trying to pick a fight,,,I want to know what is the REAL DIFFERENCE??? Is the tail more stable? I feel the stock tail yoke etc assembly has alot of slop and bevel gears will not help this.
The problem with the tail is the gears STRIP for many people
NO? I have never had this problem with the stock gears because I fly from pavement or really short grass. I agree a better tail is needed is needed... But I want INFO!

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