Castle 5th scale - Page 3 - RC-Monster Forums

Pdelcast · 11.03.2010, 12:56 PM

Quote:

Originally Posted by RC-Monster Mike

Zenoah makes gas motors - not electric. Many/most 1/5 conversions that make use of the clutch may use 10mm shafts to be compatible, but that is an adaptation rather than an established standard imo. Where do you get a 10mm bore pinion or a selection of them? I know I chose 8mm for my pinions based on a couple reasons - 1st, I prefer Neu motors and the 22 series is a nice choice for 1/5 scale - these motors happen to be available with an 8mm shaft(not 10mm). Secondly, a 10mm shaft would inherently limit the the tooth count on the low side, which forces a higher rollout - works on a gas powered Zenoah, but in sensorless brushless, to much rollout leads to cogging at startup along with excessive heat - 8mm allows plenty of shaft strength and magnet adherence, while also allowing reasonably small tooth counts to be used for greater reduction. These to reasons along make 8mm shafts make sense in my eyes. Again, it is also easier to make a sleave for smaller bore pinions than it is to bore out each pinions used, so it makes sense from this standpoint as well.

^^ All good points.

We decided to go with an 8mm shaft for simplicity reasons -- an 8mm bore bearing handles the RPM better than 10mm bore bearings, and generates less heat.

Arct1k · 11.03.2010, 01:09 PM

Partick - Please could you check your PM - I need some info for the article.

I tried calling a couple of times but got Lee, Thomas, Linda's VM - Thanks

Pdelcast · 11.03.2010, 01:47 PM

Rotor size comparison : 1515 vrs 2028

Pdelcast · 11.03.2010, 01:48 PM

Motor size comparison: 1515 vrs 2028

Arct1k · 02:04 PM

Thanks for those... The rotor pic is my fav...

How many HP is it putting out?

A any pics of the conversion kit assembled and apart? Assuming its CNC machined and black annodized vs stamped.

snellemin · 11.03.2010, 02:33 PM

That is one big Caterpillar motor.

rhylsadar · 05:45 PM

Quote:

Originally Posted by RC-Monster Mike

Zenoah makes gas motors - not electric. Many/most 1/5 conversions that make use of the clutch may use 10mm shafts to be compatible, but that is an adaptation rather than an established standard imo. Where do you get a 10mm bore pinion or a selection of them? I know I chose 8mm for my pinions based on a couple reasons - 1st, I prefer Neu motors and the 22 series is a nice choice for 1/5 scale - these motors happen to be available with an 8mm shaft(not 10mm). Secondly, a 10mm shaft would inherently limit the the tooth count on the low side, which forces a higher rollout - works on a gas powered Zenoah, but in sensorless brushless, to much rollout leads to cogging at startup along with excessive heat - 8mm allows plenty of shaft strength and magnet adherence, while also allowing reasonably small tooth counts to be used for greater reduction. These to reasons along make 8mm shafts make sense in my eyes. Again, it is also easier to make a sleave for smaller bore pinions than it is to bore out each pinions used, so it makes sense from this standpoint as well.

i see the point with the possibility for higher gear ratios. thats true. and yes of course in the US where the neu motors are that popular and the 22 series happens to have a 8mm shaft. of course that is reason for the US market.
however all the people with their mcd's, FG's, hurrax's etc have 10mm pinions ready in their boxes. anyway the 30 series lehner and bolido put 10mm shafts on their big scale motors to be compatible to those people. as there are conversion kits especially for the MCD and FG's this is sure an argument. anyway its not that important.

@patrick
i do not see the rpm-argument. in those big scalers you would go with a very high gear ratio that you need high rpm. between 20' - 30'000 rpm is more than enough for the usual big scalers. and thats not really so much right.

anyway we will see if what factory built 5th or 6th scale electric cars will come in the future from the producers. but to that point the main bulk of people will be those that convert their exisiting petrol models to electric.

bye
rhylsadar

Finnster · 04:17 PM

The only reason I see to go with a larger shaft is if there are strength issues. Otherwise its preferrable to go with the smallest shaft neccessary for wieght reduction and gearing flexiblity that Mike mentioned. 8x16mm bearings are also very common and inexpensive. (making an assumption on size)

I don't see any reason why castle should use a thicker, heavier shaft just because FG throws a 10mm pinion for a gas engine in the box. Sleave adapters are simple items anyway, and a cheaper and easier solution overall. I'm sure Mike could pound them out asap like his 1/8/4mm/5mm adapters. Novak in a year or two. lol

That or just buy the right 8mm pinion you need. Who says the one in the box will be right anyway?

Anyway, motor and esc looks tremendous. GJ as always Patrick

BrianG · 11.03.2010, 04:18 PM

I would say stick to 8mm shafts and use bore reducers for those with 10mm pinions. That way, no one gets left out: use 8mm pinions directly or use a 10mm-8mm sleeve/reducer if you have 10mm pinions. Pretty simple IMO.

BrianG · 11.03.2010, 04:21 PM

Quote:

Originally Posted by Pdelcast

Rotor size comparison : 1515 vrs 2028

Quote:

Originally Posted by Pdelcast

Motor size comparison: 1515 vrs 2028

So Patrick, when are you getting into the e-motorcycle/bicycle market? Any more similar increases in motor size and we'll have affordable really big scale conversions.