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Sep 30, 2012, 11:51 PM
Power Wheels Guru
UNGN's Avatar
BIM, is this your 22mm unit?

I found in bottom of a box of parts purchased.

I sanded the rotor down so it fit in the housing, mounted it on a Mustang 8.4mm and it seems like it makes an OK amount of thrust for being so tiny.

I'd like to get some more of these.

Do you sell the 6 blade rotors?

Also, is there is reverse rotation rotor since these spin the brushed motors backwards?
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Oct 01, 2012, 12:31 AM
Micro Boat Forum Founder
boredom.is.me's Avatar
Yep, that was from the very first batch back in 2010! The 8.4mm housing too. I don't think I've seen anyone else actually use that combo though. If I recall correctly, they were too heavy compared to the amount of thrust they put out.

Is there any chance that you would be able to get some numbers for that unit right there?

If you are really interested, I can dig it back up and add a few updated features to it.

Those rotors are GWS rotors, but I do have my own rotors from my smaller units that I can work with. I'll have them ready by Wednesday. I can make them reverse rotation too. Do you think the motor needs to be loaded more?
Oct 01, 2012, 02:09 PM
Power Wheels Guru
UNGN's Avatar
7mm might be the best route to go. I made a test rig out of plastic cups and it makes about 10g of thrust with a 6.6g weight. If a 7mm makes the same 10g of thrust, it will save 2.5g per motor, @ 7mm motors are only $2 instead of of $8.

I think I will be ordering some 7mm housings from you. I'm thinking of a "throttled" 2S mini 747 or A380.
Oct 01, 2012, 11:39 PM
Power Wheels Guru
UNGN's Avatar
I tested the Albatros 7mm wih a GWS 6 blade fan in a 22mm housing.

AUW was 4.5g with plug... probably less because I used duct tape to make up the difference between 7mm and 8.5mm. Thrust was over 8g.

If you'll make them, I'll take 6 pcs of belled 22mm housing for a 7mm motor.
Oct 03, 2012, 12:44 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
I got the 7mm shrouds finished and up to spec. They have a theoretical mass of 1.14g. They have the same specs as the DF22.

DF22
* I.D. = 22mm
* O.D. = 23.4mm
* O.D. with Lip = 28mm
* Motor Option(s) = 7mm, 10mm, 2g outrunner
* Stator Count = 3
* Optional Intake Lip = yes
* Weight of 7mm =
* Weight of 10mm =
* Weight of 2g Outrunner =
* Specific Rotor = no

I also got the rotors completed, but I'm not sure which is the better option: 3 blade or 4 blade...

I'll shoot you a PM.
Oct 03, 2012, 02:07 PM
Power Wheels Guru
UNGN's Avatar
The cut down GWS Rotor seems to load the 7mm fine and it doesn't get too hot... I don't think it got hot at all...

Kev,

What do you think the thrust difference would be going to the smaller diameter...say 20mm? If the thrust is about the same, I'd go with the smaller housing.

Or going with a 3 or 4 blade SLA rotor instead of the GWS unit in the 22mm housing?

I will order 2 22mm housings for 7mm motors, 4 20mm housings and rotors for these (maybe 3 Std and 3 reverse rotation)

PM me a quote for this and I will paypal you.

I'm thinking of trying these on a DF A380 with a Mosquito brick to see if it will work, before building something full fuse.
Oct 03, 2012, 03:45 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
We can compare it to Joe's test. That was with a much smaller motor and 2mm less toward the diameter. With the same rotor (of appropriate diameter), it won't make less. I'ld say that 8g sounds reasonable. Now the 7mm can obviously handle more than any 6mm, much less the Ares super short motor.

How does this sound? For every 3 blade rotor you get, I'll add in a 4 blade at my expense.

No matter what units you get, the cost for the std rotation is the same as the counter rotation.
I'll get on it.

Quote:
DF18
* Motor = Ares 6mm 4.5ohm Coreless with unknown capaciter
* Motor Option = 6mm
* Thrust = 4.8g
* Rotor = DF18 Rotor
* Cell Count = 1s
* Current =
* Weight = 2.1g
- Thanks to Joe Malinchak
The DF A380 is a good idea!
Oct 03, 2012, 05:13 PM
Power Wheels Guru
UNGN's Avatar
That's sounds good, just shoot me a total and I'll paypal you.

I have a lot of projects so I'm not in a huge hurry for the units.
Oct 18, 2012, 03:49 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
SO MANY PARTS! I just finished cleaning them. Now I have to trim them. Finally, I'll have to sort them for shipping.

There are all of the rotors in both rotations as well as many of the different shrouds from 15mm to 22mm with and without lips.
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Oct 18, 2012, 06:27 PM
Need 4 Speed!
pdawg's Avatar
Did you hear that a new shapeways factory was just opened in NYC? That should make getting parts the US faster.
Latest blog entry: original Y/A F-18 Kit
Oct 18, 2012, 06:51 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
Ya I saw. It looks nice too. I think it is just a bigger facility than before though.
Oct 18, 2012, 08:23 PM
Registered User
Have a better shipping cost too???
Oct 18, 2012, 08:25 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
$6.50 is a standard US shipping cost.
Oct 18, 2012, 09:29 PM
Registered User
Bim I send you a PM...
Oct 18, 2012, 10:05 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
I'm going to start including screws that can be used to mount most sub 25mm and under units, provided your order passes through me. It's just something I'ld like to throw in as extra.

UNGN will be the first of this offer (aside from when I sold complete units).


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