LMH Helicopter Discussion of all LMH helicopters both electric and glow.

LMH Vmax 7 engine

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Old 12-31-2005, 09:08 PM
  #76
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Default RE: LMH Vmax 7 engine

Piper511, you doesn´t seem do to get that "CLINK" in the air like the others when their V7 goes all to he** you only get a carb full of fuel. empty it and you be fine.
But this is a serious subject, I', soo sick and tired to hear all the stories about V7 engines that go "KlinK" and "Klank" in the middle of the air.
You buy a brand new heli LMH 117, put some expensive electrics in it and the engine fail in the middle of the air, in best case you get away with some broken main blades and such but in the worst case.
You might have to get a new receiver, servos, main shaft, main blades, tail boom, tail rotor case and all kind of stuff.
LMH should really address this Flaw, cause I think is a REAL Flaw in their helicopter.
Sure it's great that they replace your engine without hardly any questions asked, but do they replace your electrics and other parts that breaks because of your engine gives up? and should they really have to replacy your Engine ?, I think not, I have flying planes over 10 years with engines standing right up and inverted and I can never blame the engine for crashing my modell.

LMH Please shape up and get some new other engine in your model, cause it's a really GOOD Heli to get inroduced in helis with.

//Peter
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Old 12-31-2005, 11:14 PM
  #77
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Default RE: LMH Vmax 7 engine

Hi Peter:

If you go back to post # 73, you will find that Piper 511 did have the most hated "clink" sound. I agree with you that LMH should be having much more concern about this issue. I can't imagine going to work in the morning and shipping out 30 helicopter kits knowing that 19 are going to have a blown motor after 2 hours of running time .. that is just awful. If it were my company, I would stop shipping the nitro machines until the problem was resolved. I can't beleive that a simple glow engine with three moving parts can't be manufactured to be reliable, as most all the rest are. Keep in mind that LMH doasn't make the engines, they are made by Norvell .... they would have been booted out the door long ago, if I was running the show. Then, there's always the possibility that the Norvell dude is a brother-in-law or something ?!?!? LOL And I also agree that the heli is without doubt the best, most bulletproof heli trainer out there. It's a shame to screw it up with a cheesy engine !

Russ
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Old 02-08-2008, 12:31 AM
  #78
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Default RE: LMH Vmax 7 engine

dayyumm..n' I just bought one!!
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Old 02-08-2008, 03:45 AM
  #79
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Default RE: LMH Vmax 7 engine

"KLINK" yet ???
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Old 02-28-2008, 06:57 AM
  #80
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Default RE: LMH Vmax 7 engine

Norvel is a Russian engine company that has since gone defunct, over in the 1/2a forum are guys (myself included) trying anything to keep these engines alive, because there are no more parts being made and they are great engines...in my LMH I had 8 yes 8 head shims to lower the compression in my LMH and it ran great with plenty of power... havent run it in a while.. but it broke in fine and still has all 8 shims in it....I think the break in procedure was a big part of the problem ,,,we are used to OS engines that just start up and go and break in on the first flight.......Norvel made...049. .061. 074,.15,.25.40 engines for a short time, they are powerfull fast engines..Rog.
.they have said they are moving and retooling, but there is no way to verify this and it was stated a couple of years ago...
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Old 06-10-2008, 07:27 AM
  #81
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Default RE: LMH Vmax 7 engine

hi all,

just wondering if the Vmax 7 engine are still having problems since the problem was first identified and addressed to LMH.
anyone found any good and easy replacement in the same engine class? i.e. <.10 capacity?

thanks

Lawrence
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Old 06-27-2008, 04:55 PM
  #82
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Default RE: LMH Vmax 7 engine

I looked into it. Electric one me over though. I think ofna makes a .12 with a slide carb that would work

Cameron
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Old 09-28-2008, 01:27 AM
  #83
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Default RE: LMH Vmax 7 engine

is it possible to turn 117 into a electric? If so how? If anybody done it, post some pics please. Thank you guys
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Old 09-29-2008, 12:58 AM
  #84
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Default RE: LMH Vmax 7 engine

Jcervantes11,

Theres are alot of people who have converted an 117 to electric.

http://www.rcuniverse.com/forum/m_12...4/key_/tm.htm#
See at the bottom of the page..
//Peter
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Old 12-14-2008, 04:16 PM
  #85
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Default RE: LMH Vmax 7 engine

OS .10 would probably be good to try,, I may do that,,Rog
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Old 12-24-2008, 10:46 PM
  #86
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Default RE: LMH Vmax 7 engine

well my lmh engine died, well the piston shaft broke while i was flying. Now what should i do next? Convert to electric? What should i do?
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Old 06-03-2009, 01:19 PM
  #87
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Default RE: LMH Vmax 7 engine

this thread still active ?
I want to ask where I can get the glow plug or glow plug adapter and a glow starter.

I got a used one with a blown glow plug and trying to get it running.
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Old 10-12-2009, 08:40 AM
  #88
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Default RE: LMH Vmax 7 engine

Hey folks,

I tried os max 10 fp on my lmh, seems to have overheat problem after first lift of 10 s or so.
tried different needle valces settigns but still the same.

put back force .12 and it is ok , although the engine does feel really HOT after each flights.

may i know for those who sees success with vmax 7 engine, what are the neddle setting?

Cheers

Lawrence
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Old 10-12-2009, 03:16 PM
  #89
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Default RE: LMH Vmax 7 engine

Hey can you tell me what other parts you use to use force 12?
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Old 10-13-2009, 02:22 AM
  #90
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Default RE: LMH Vmax 7 engine

Hi Jim,

the info has been discussed in the thread
cv 12 mounted on lmh 117, under this forum as well,
http://www.rcuniverse.com/forum/m_12...tm.htm#9130005

basically, i installed the engine with pullstart and a team associated clutch of 16 tooth clutch bell.
then you have to custom made a throttle. i made cable and sleeve for 90 degree bend, while peter used a bell crank for same purpose.

cheers

Lawrence
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Old 10-13-2009, 03:15 AM
  #91
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Default RE: LMH Vmax 7 engine

Dhoo !!
Lawrence, you just reminded me, I haven't posted the pics I told you I would of my bellcrank setup... I'll do it once I get home...

Im sad to say it started to snow here in Sweden this morning (already gone though)..
I have to wait for a really nice warm autumn day before I want to go out and make a new attempt to get the heli airborne..

//Peter
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Old 10-13-2009, 04:37 AM
  #92
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Default RE: LMH Vmax 7 engine

Hi Peter,

You guess what....I actually 'waited' for the colder weather to come, becasue the air cooling will be much more effective ! I found out this with original Vmax 6 ( which lifteed well in winter but struggle to lift in summer) , then same rules also applies with car engine coversion.

this means that if we can find a better way to cool the engine, it will be perfect, wonder if there is anyone here has the tool to make an oversized cooling head fin for car engine.

Cheers

lawrence
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Old 10-13-2009, 04:57 AM
  #93
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Default RE: LMH Vmax 7 engine

Hey,

Throw out a question at the Cnczone.com.. maybe someone can make one for you..

//Peter
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Old 10-13-2009, 01:40 PM
  #94
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Default RE: LMH Vmax 7 engine

Hi all,

Well here's the pics... I know the quality isn't the best but what can you expect of a cellphone
At least you get the picture of how I did it..

//Peter
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Old 10-15-2009, 09:16 AM
  #95
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Default RE: LMH Vmax 7 engine

Hi Peter,

not bad, quite a neat fit.

well, i have asked the question at cnczone.com. good news is someone told mi a normal lathe will do the job without the need for cnc.

but i am still awaiting help.

meanwhile, i saw this. it is exactly the extra heat sink i needed!
credit to www.themanfrommoon.de> Chris from Germany.

Anyone has the ability to produce similar extra clamp on heat sink?

Cheers

lawrence
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Old 10-15-2009, 09:59 AM
  #96
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Default RE: LMH Vmax 7 engine

Yeah, I remember him.
I never got around to order anything from him though..

Have you asked him if he can make you one ??
//Peter
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Old 11-09-2009, 04:07 PM
  #97
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Default RE: LMH Vmax 7 engine

I was playing with my 110 yesterday and the engine started up and flew great... No stalling, bogging or overheating issues... Had plenty of power as well...can't really complain about the engine as mine works fine... air temps were around 70 degrees here in the northeast so not too warm and definately not too cold out.. I have a couple of head shims in mine and I'm running 20% coolpower fuel.. seems to work fine that way... I looked at converting the engine to a more common 12 out of one of my R/C cars, but this one works fine.. If I change it at all it will be to a brushless setup.. just for ease of use...
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Old 12-04-2010, 08:07 AM
  #98
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Default RE: LMH Vmax 7 engine

If you, guys, need parts for Vmax6 or Vmax7 (or for any NV airplane engines), please contact me at klondike17@juno.com. I am a factory rep and all parts and engines are available. Thank you
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