Posts: 53
Joined: 8/26/2005 From: London, UNITED KINGDOM Status: offline
Hey Guys,
sorry for being away for some time. It is great to look at this forum to get so useful inputs. Finally i have attached a force .12 car engine to my old LMH 100+ and did a test last weekend. the engine did start and roared but the heli wont lift although it does spin at quite high head speed. things need to done/ tried out:
(1) change the current 4 degree blade holder to 6 degrees as i think the engine is powerful enough but not fast enough (2) fine tune the engine to get higher head speed. also it is not very smooth at the moment and died out suddenly sometime
by the way, i followed some friends here to use a steel cable in a plastic sleeve and it is indeed very smooth for the throttle for mounting, i custom made an engine mount to the particular engine by using a piece of wood ( i know, this is basic level but considering the equipments i have, this is best i could do ) . it however turned out great as i can keep the original pull start, clutch etc , and even didn't have to extend the lmh original main gear shaft.
one other thing, i re-watched the video that Peter sent to me and realized that the 4 degree experiments were running at a much higher pitch, so i hope the 6 degree blades will do some good for my upcoming experiments. i will definitely keep u guys posted ( but bear in mind it is winter and cold over here in UK, might delays some test flights). meanwhile, any inputs/thoughts will be very much appreciated.
Posts: 63
Joined: 5/30/2005 From: Stockholm, SWEDEN Status: offline
Finally...
Well done ! It looks like a winner !
If I remember it correct, notasme who made the one in the movie did use both 4 & 6 dotted grips. He was also using a alu. crutch so it shouldn't be a weight issue either. What's your gear ratio? maybe you could try fewer teeth on the engine ?
Posts: 53
Joined: 8/26/2005 From: London, UNITED KINGDOM Status: offline
Hi Peter,
Thanks for the encouragements! and good point on the pinion teeth, i will look into this and see what is the 6 dots testing scheduled this weekend. will keep you guys posted.
Posts: 135
Joined: 2/18/2005 From: hendersonville,
NC, USA Status: online
I think I have found a possible substitute for the Norvel. It's another car engine, but looks like it will fit in with a little work. It's the Sportwerks .05 that comes in a car called the Chaos. The motor runs right about $100 and has a pull start. Sportwerks .05
Posts: 63
Joined: 5/30/2005 From: Stockholm, SWEDEN Status: offline
Timmy, I don't think that engine will hack it, considering the Vmax .06 engine which comes with the LHM 116 barely does its job. If you want something smaller than .12 and .15 engines you could have a look at Kyosho, their 1:16 cars have a Sirio .09 engine but it doesn't have a pull start. Or you could have a look at HSP and their 1:16 cars they have a 1.1 engine with pullstart.
Posts: 63
Joined: 5/30/2005 From: Stockholm, SWEDEN Status: offline
Well, Lawrence got me hooked. Im going to attach a .11 kyosho car engine with a team associates clutchbell to my old LMH 116. I figured, what better heli can my 13 year old nephew start to fly and make hard landings with than a LMH. These things will differ from the original setup .11 car engine. 5mm mainshaft. Belt driven tail. Gy401gyro. CF Tailboom Don't know what servos I'm going to use.
I went out last night to my little hobbyshack and started to assemble the heli, and found out that the only things I was missing was some ballinks, the wire that runs in the subrotor and the follower arm, I have to make a new one since the original is on my Extreme V2 rotorhead.
Going to try and place the engine in front of the firewall and the servos behind. Hope to get a better CG. I'll try to keep you posted with some pics of this build.
Posts: 63
Joined: 5/30/2005 From: Stockholm, SWEDEN Status: offline
The project goes on. Here's the crutch, I'm not even going to try to put the engine in front of the FW. If the CG is totaly off, I'll make a different crutch out of 5mm ply. Location of the engine will be at the same place as Lawrence put his.
I'm going to put the engine in a teststand so that I know its working and to tune it so it starts easily. more pics to come
Posts: 63
Joined: 5/30/2005 From: Stockholm, SWEDEN Status: offline
Some progress... despite the whole family (me, wife and two kids) first got a really bad cold and the week after we all got the flue as well, ain't life great Well back to subject...
I got the motor to run, started almost right away. Servos and tail mounted, I decided to borrow the whole tail from my other heli. I also repainted it. I can't seem to find a CF-boom with the same dimension here.. have to order one from US. Once I have that I'll make a new elevated tail using original tailgearbox, still with beltdrive. What's left to do now is mount gyro(matter of decide where to put it),battery,RX and attach the throttle wire to the servo.
//Peter
< Message edited by Peter_d -- 4/10/2008 1:14:05 PM >
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RE: cv 12 mounted on lmh 117 - 
