I am collecting orders for gearboxes.
Former Velkom company now developed metal gearboxes for Speed 600/700, Jeti Phasor and Mega motors.
Ballbearings, 5mm shaft.
If somebody interested please, contact me at:
(508) 764 4990 or
prop.rc@verizon.net
36.90$

Check the quality.

What do they weigh? Does each gearbox come in one gear ratio only or do you get three pinions with the box so you can change to the other ratios yourself?

You'd probably be better off posting this in For Sale / Wanted.

Thx, Pete

The price was $29.90 in your other post, or was that a different gearbox? if so what are the differences?

http://www.rcgroups.com/forums/showt...threadid=23312

They come only with one ratio.
1.5 oz.
Different gearbox.

Originally posted by modest-master
They come only with one ratio.
1.5 oz.
Different gearbox.

Which ones are only 1 ratio, and which ones are 1.5 oz? and what are the other ones wright wise?
Do the ones above come with more than 1 pinion?

They are three different ones.
1. Ratio 2:1.......1.5 oz.
2. Ratio 2.5:1........1.5oz.
3. Ratio 3:1........1.5oz.

Originally posted by modest-master
They are three different ones.
1. Ratio 2:1.......1.5 oz.
2. Ratio 2.5:1........1.5oz.
3. Ratio 3:1........1.5oz.

OK, now are those for the $29 ones?
the ones in your other post for $29 and for $27 were also those ratios

Old Velkom stock only couple of them left for 29.90$ (10-15). At that time I did not have this information. The new ones are for 36.90$

Funny, I just bought one of those gearboxes (3:1 ratio). It weighs 98g (3.45oz). Okay, not all of the srecws are needed, but 1.5oz? Never.

Frank B,

thanks for that post! I got mine a little while back and remember being surprised how heavy it was, but I couldn't figure out why I thought it was going to be lots lighter - now I remember - this thread

2 oz in 40 odd would not be that big a deal, except when its right on the darn firewall!! At least it looks solid and the ratios are fairly easily swapped.

The old ones were 2.5 oz (not 1.5 oz).
.
The ones in the picture at the top for Jeti have an extra half moon shaped piece which presumably adds another ounce.

Rick

I'm flying one of these gearboxes already.
Like the one in the very first pictures in the thread.
Good heavy duty gearbox...I'm using the 2.5:1 ratio
on a Phasor 30-3 pulling a 18.5 X 12 prop on a
107" motor glider at 61 oz using a 10 cells 2000 mah pack.

The gearbox works great, but you better loctite the screws.
And there are more screws in the kit than I needed for the
Jeti. It seems to be a gearbox for many different mountings.
It is beefy and probably weighs the 4 oz or so. But I'm not
going to take it out of the glider to weigh it, sorry. It needs to be
strong and a bit heavy to handle these kind of prop sizes.

Mine says it's manufactured by Model Motors in Czech Republic.

The actual measured draw on static is 16 amps and 3100 rpm.
Probably should have used the 2:1 ratio but I don't have that
one.

Jay

Jay,

What ESC are you using? Is the GB holding up to the brake? Lost a Mega 1.8:1 box. I am new to brushless. In my brushed (Astro FAI 40G) days, I would use a soft start/ brake esc. I have not noticed this feature in brushless esc's. I am using a Jeti 70-3p opto. Just wondering if the brake ate my pinion or will do so also with a Esprit 2:1 GB. Thanks for any info.

Steve Hudson
OKC, OK