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Old 09-05-2013, 01:14 PM   #1 (permalink)
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Default HWC EI kit for RC engine

It's available now:
http://www.centuryheli.com/products/...106&pageid=690

Please share your experience if you used it.

I wonder how much weight we saved using the lighter flywheel, and removable pull-start.
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Old 09-05-2013, 04:36 PM   #2 (permalink)
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Here're my thoughts about EI.

Advantages
  • Weight saving - no magnetic coil pickup, lighter custom flywheel. This weight saving will be offset a little by the additional CDI component that you'll have to mount outside of engine.
  • Smoother running engine - because of better, optimal ignition timing
  • Much easier to start
  • More power - because of better timings, fuel/air mixture will be burned at optimal times resulting in more power, better fuel mileage, less smoke and pollution. I think the increase in power might be negligible. But more power because of higher power to weight ratio should be more apparent.

Disadvantages:
  • One more component, CDI box, to be mounted on heli frames.
  • EI components consume battery power which shorten flight time. A good on-board generator will mitigate this power issue. If users have to install a 2nd battery to feed EI components, then the weight saving advantage will be reduced further.
  • Additional cost

What do you think?
Is it worth it to convert to EI?
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Old 09-05-2013, 04:59 PM   #3 (permalink)
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not to me it isnt.
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Old 09-06-2013, 05:33 AM   #4 (permalink)
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Unless you know where to set the timing, you will not get a power increase. I have tested adjustable timing years ago with no appreciable gains in power.and the timing curves are not adjustable, as far as weight goes, about 3-4 ounces on the set up I made. I can't feel it, can you? I guess combined with other weight reduction but I am thinking the majority of us squids( yes me too) won't be able to tell.Starting may be a benefit, but smoother running has yet to be seen.the cost is a major issue. I have not seen the benefits outweigh the negatives that is why I have not gone forward with this. I am not hating, just explaining the points of what already has been mentioned. If you like the set up by all means go for it it won't hurt just don't think it will be all that and a bag of chips for what the chips cost. Peace, Al
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Old 09-06-2013, 08:52 AM   #5 (permalink)
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+1 on Al's comments. The electronic ignitions I tried seemed to be very sensitive to tune up. If you were a little rich, you would know it right away. This points to a weak spark IMHO. Now this Century spark box may be different. Somebody buy one and bring to SoCal. we will do some dyno runs with it
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Old 09-06-2013, 12:17 PM   #6 (permalink)
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From other users' feedback that I can find, they all concurred with what Al said. There's no noticeable power increase due to EI or weight saving. So the disadvantages outweigh the benefits.

I like Century removable pull-start:
http://www.centuryheli.com/products/...?prtnm=HWC2103
http://www.centuryheli.com/products/...m?prtnm=CN2354

Does anyone know whether it will work with the standard flywheel?
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Old 09-06-2013, 02:40 PM   #7 (permalink)
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i dont know man, but i like the idea too, i get tired of carying my starter everywhere. and i would love to use the top start for a generator. but i just love the way the heli looks on the align skids, it sits so low, i like it. i dont want to have to use the big tall skids just to get to use the pullstart.
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Old 09-10-2013, 03:20 PM   #8 (permalink)
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Quote:
Does anyone know whether it will work with the standard flywheel?
No it won't work.The std fan hub isn't tall enough to engage the starter mechanism
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Old 09-11-2013, 03:37 PM   #9 (permalink)
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Thanks Carey for the confirmation.
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