View Full Version : Z20 Variants
backwall
07-22-2008, 10:50 AM
Anyone using the Z20 1700KV?
helvetic
07-22-2008, 10:54 AM
Anyone using the Z20 1700KV?
Not what you asked for, but...
I can recommend the Z20 1470. You can use the main gear (61T) as the front gear with a 13 or 14 T pinion. No stripped gears and better punch than the Z20 980KV. (using on 6S)
The Z20 1700 KV is only for a max of 5S !? Is there a benefit for the 1700KV?
mysticmead
07-22-2008, 12:55 PM
any use for it.. I'm sure there's a use for it or they wouldn't have made it.. maybe someone is looking for a head speed around 3000rpm so they can make their 550 or larger heli pop around like it was on crack
Does the Z20 1470Kv bog at high headspeed? I noticed that my Z20a 980 Kv with a 15T pinion, while can run 2000+ headspeed, bogged like crazy as soon as I do something with fast collective like tic-toc. Finally went to the Scorpion motor 1210 Kv to get rid of the bogging problem.
faxxe
07-23-2008, 01:41 AM
Finally went to the Scorpion motor 1210 Kv to get rid of the bogging problem.
how many flighttime you loose compared to the Z20-980?
-heimo
how many flighttime you loose compared to the Z20-980?
-heimo
I used to be able to fly fairly aggressive for around 6:30 min to 7:00 min at 2000 rpm headspeed on a set of FP3200 EVO30. Now I can fly between 4:30 - 5:00 min at 2200 - 2300 rpm headspeed. I basically stick bang the Hurricane (mostly tail down and aileron tic-toc) for pretty much the whole flight. The Scorpion motor does not bog at all.
faxxe
07-23-2008, 02:58 AM
The Scorpion motor does not bog at all.
Thank you for that Information.......
Regards,
heimo
backwall
07-23-2008, 09:21 AM
I've seen a number of sites that say the 1700KV is 6S. Draw is 55 amps. Yes. it will shorten flight times some, but should give a pretty good punch where the 980KV bogs down at times.
mysticmead
07-23-2008, 09:59 AM
of course the 980 bogs.. it's not a hot 3D motor no matter how it's geared. the Z30 is a much better choice for 3D.. and if you're bogging the 980, then you have outgrown the motor... once that happens for me, I'll look at the scorpions...
Pinecone
07-23-2008, 02:39 PM
And the gearing will get interesting with a 1700 kV motor on 6S. That is close to double the kV of the stock motor (890), on the same voltage, leading to close to double the head speed.
Not even sure if the 13/60/20/61 can handle it. It looks like even with that, you are running around 2400 RPM head speed.
mysticmead
07-23-2008, 03:06 PM
2400 is doable.. and for those that have to have head speeds that high.. they'll have fun with it.. bet Finless couldn't say he needed more head speed with one of those stuffed in a hurri :D
worldofmaya
07-23-2008, 04:52 PM
I read from people running the 60 front with an 11T motor pinion to get decent RPMs from an 1700kV. The 1700kV isn't the right motor for a hurricane's gearing. For power user at least the 1400kV Scorpion or a Z30. I'm using a 1600kV Scorpion. Bogs much more than a OBL43/11 (hardly any difference from an Z30). Flight times with Scorpions are better. But doesn't have this hard punch .
-klaus