RunRyder RC
WATCH
 1 page 810 views POST REPLY
HomeAircraftHelicopter
e-
Mikado
Other › If you have a Nennos tr hub/pulley , check the teeth width!!
10-25-2006 08:06 AM  12 years agoPost 1
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

Well today brought some big pain. Aileron tic tocs 10 feet under off the deck, belt broke and not time or room to recover, a near writeoff, and the second near writeoff in the last month to make matters worse. Getting to be expensive to say the least, lol.

Anyhow... in investigating why it broke as I check my belts and all my stuff to the point of being anal almost I found something interesting which I think may have definetly played a role in this belt issue.

In looking at the Nennos tr hub or to some known as pulley I noticed a distinctive wear on the pulley itself. In fact it looked like the teeth are getting narrowed or worn in a matter that they are too wide, so I looked into it further. In taking a digital caliper I measured the teeth width to be 2.70mm "worn part" in width at half height of the teeth, 2.80mm on non worn part. Then measuring the Mikado one it came in at 2.37 on every tooth "new pulley", that is quite a difference when you are talking about belt cog spacing! Now I also noticed that the depth of the teeth is approx .4-.6 of a mm deeper on the Mikado one as well.

So I may have got a bad pair of these or this may be a problem.

I bring this up so anyone who has one of these nifty pulley/hubs can look at theirs and see if they are in risk or if their is different in measurements.....

If anyone has one or more of these please let me know your measurements. Meanwhile I emailed Nenno to see what the deal is on these.... I love the setscrew idea and metal but not at the risk of wrecking belts and helis.

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 08:15 AM  12 years agoPost 2
Lorents

rrElite Veteran

Oslo, Norway

My Posts: All  Forum  Topic

Oh cr@p - thats really too bad Shawn!!!! Really sorry to hear about your crash

How many flights did you get on the belt?
Do you think the pulley has been worn down or was it produced this way (I guess thats what you are trying to find out too)?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-25-2006 08:23 AM  12 years agoPost 3
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

Both my Nennos pulleys are 2.7 on the "worn part", it is actually 2.80 or so on the non worn part", now are other peoples this width?? I do not know, exactly as you said I am trying to find out and learn from this. I corrected my top post to clarify this, thanks for pointing this out.
I am not saying this is what did wreck the belt, but very well could have contributed as I know the parameters on spacing are supossed to be dead on for belts. In taking the belt on the stock one "by hand" it has more "bite" than this Nenno one, or at least it feels that way. I wish I had looked at this a long time ago however there were no problems at least to my knowledge. This belt didn't have 50 flights on it. I thought originally it had a ton then remembered my last crashola I changed it out to a new one, so more like 20-25 flights total.

Yea frames, a lipo, even the frame esc shelf and lower one are gone from the heli completely and couldn't fine em, lol. Ordered the parts tonight and came in over 500 , not including blades, lipo that I betn like a bannana, worst crash I ever had with these Logos that is for sure. If it had been horizontal and not in an aileron tic toc so low I am 99% certain I could have saved it and maybe wrecked a boom or canopy at most instead of so much damage. In trying to get it horizontal it turned into an uncontrollable chaos of sorts, it was quite spectacular actually, lol.

Next time I put one of these in like this I will just stick to one L14 and parts, maybe get a 600 rex for a trainer or something as this stuff gets pricey fast with Mikados.

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 08:40 AM  12 years agoPost 4
Lorents

rrElite Veteran

Oslo, Norway

My Posts: All  Forum  Topic

20-25 isnt much at all, I have one belt with at least 120 on it and it still looks good...

Is the lipo just bent or is it totally dead?

Really tough having two big crashes in such short time! I am starting to think that I might need another L14 as a backup

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-25-2006 08:52 AM  12 years agoPost 5
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic


Not sure I trust it. The balancer says all cells check out, but one cell seems abit pounded in which makes me nervous of using it again....

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 09:14 AM  12 years agoPost 6
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

Oh man, sorry for your loss.

Battery dont look that bad, I had a 10s2p TP pack that took a much worse hit and was still OK.

However, I would just keep it outside while charging for 10 cycles or so.

Regards to belt, I have 350:ish flights on my Logo 10 on the same belt, thats with the standard plastic gears, but ive seen the same thing happen on my T-Rex with a metal gear, just after a few flights.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 09:15 AM  12 years agoPost 7
Lorents

rrElite Veteran

Oslo, Norway

My Posts: All  Forum  Topic

I have 350:ish flights on my Logo 10 on the same belt...
Not bad! I guess I am too anal about changing parts before they are worn out

You could try to charge it on your 1010 with the balancer and see if the balancer gets hot. Then you could discharge it without using the balancer and use the balancer afterwards to see if it is in balance? If it seems ok after that I would try using it...

I crashed my trex yesterday - it bogged down in an attempt to do a piro-funnel and it went nose down into the asphalt. I found the lipo 10 meters away from the heli and it was shaped after the battery tray, had a couple tears in the heat shrink wrapping and a couple dents but I did the same as described over here and it seems to be ok

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-25-2006 09:20 AM  12 years agoPost 8
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

Hey thanks for the kind thoughts fellas, appreciated. But...it is like they say I guess "if you want to play, you gotta pay."

That being said...

Well I know to be safe I am putting a brand new belt on my backup bird before flying it again as well changing out the metal hub to the stock one until I get a confirmation on this metal one and its measurements etc.....Failures on my part of flying I can handle, failures on part of equipment drive me bonkers!

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 09:25 AM  12 years agoPost 9
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

Here are a few more,,, I dunno, I am going to have to think through a risk matrix on this lipo, that would be all I need is a ball fo fire in the air next, lol.

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 09:30 AM  12 years agoPost 10
MrMel

rrProfessor

Gotland

My Posts: All  Forum  Topic

What you could do is to take off the outer cover, inspect the cells, if they look good, get some new shrinkwrap and reapply on the battery.

(if they dont look Ok you can salvage the good cells if you want..)

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 09:31 AM  12 years agoPost 11
Lorents

rrElite Veteran

Oslo, Norway

My Posts: All  Forum  Topic

if you want to play, you gotta pay
Very true for this hobby! One day you feel its just a completely waste of time and money and the next day you feel like dumping your job and family to spend more time with your helis
I am going to have to think through a risk matrix on this lipo
I guess the worst thing that could happen is either a punctured cell or a internal short in some of the wires? The decision is much easier with a cheap trex for sure...


Glad you have your backup bird - it seems to come in handy these days

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-25-2006 09:32 AM  12 years agoPost 12
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

(if they dont look Ok you can salvage the good cells if you want..)
Well that is true, that may be an option.....

You know I got to thinking,,, there are several other makers using metal pulleys front and back, can't see why it would be an issue...? I am hoping this is a case of the ones I got being machined wrong, I really like the setscrew idea and not having to take tailcase apart to change out a tr shaft.....

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2006 08:36 PM  12 years agoPost 13
jamesotron

rrApprentice

Auckland, New Zealand

My Posts: All  Forum  Topic

Do flight power let you send packs back for repair like TP does?

sociable.co.nz

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-25-2006 10:19 PM  12 years agoPost 14
Klinger

rrApprentice

Brisbane Australia

My Posts: All  Forum  Topic

Sorry to hear about your mishap, sounds like you were having a good time up till then. I'd agree to give the battery a try in something as its probably the biggest expense to replace. Give it to someone with a rex600 to try for you.

PM  EMAIL  Attn:RR  Quote
10-26-2006 07:13 AM  12 years agoPost 15
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

Yes you can repair cells and Flightpower in general imho is far better for their service and backing their product, however I had more than a few cycels on this one, contemplating whether it is worth it to repair or replace. I got all the parts on route so that is the postive note.

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2006 07:38 AM  12 years agoPost 16
NTM

rrVeteran

Lloydminster, Alberta, Canada

My Posts: All  Forum  Topic

Heck, send it to me I'll fly it !

Sorry to hear about your luck Shawn, that really sucks after the whole "lone pole" incident.
You just saved me some money (maybe alot of money !) on a nennos tail pulley though.

PM  EMAIL  Attn:RR  Quote
10-29-2006 08:59 AM  12 years agoPost 17
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

12.5 to 13 hrs later the L14 is reborn. Now I am thinking as I look into this further and examined my other logo that the pulley may not have been the culprit "completely" but perhaps simply a defective belt. Now I am on a mission to see if there is a better name brand belt out there with same teeth and cog dimensions as the 592XL belt (Logo 20) belt. Anyone know of one?

...Once upon a time there were Nitros, flybars and frequency pins...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 12:46 PM  12 years agoPost 18
gordo high

rrApprentice

down yonder in the south

My Posts: All  Forum  Topic

Damn Shawn, sorry to hear of your mishap, but glad you got er fixed.

Don't know of any other belt that will match up, but I have found the stock belt to be of a very good quality. Maybe you got one that was made on fri afternoon?

I'm sure Mikado would like to hear about this, maybe even make some of your parts up to you. I'm sure they don't want to loose your business, especially lately.....OUCH!!!! Take care and good luck!...

Honey, I just need this one more thing and then I'm set..

PM  EMAIL  Attn:RR  Quote
10-29-2006 01:01 PM  12 years agoPost 19
scott sr

rrVeteran

SEAFORD

My Posts: All  Forum  Topic

Does anyone have nenno's web address ? I would greatly appreciate it . I have put it where I would remember and now I forgot .

Scott Sr. ><> ****Support Our Troops**** ><>

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 02:52 PM  12 years agoPost 20
scott sr

rrVeteran

SEAFORD

My Posts: All  Forum  Topic

I found the address , it was in the last place I looked . Thanks

Scott Sr. ><> ****Support Our Troops**** ><>

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 810 views POST REPLY
HomeAircraftHelicopter
e-
Mikado
Other › If you have a Nennos tr hub/pulley , check the teeth width!!
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Saturday, December 15 - 10:35 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online