New Dynamax Xtreme Fan System - Page 2 - RC Groups
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Jul 21, 2010, 08:50 PM
Average Joe 2 Semi-Pro n Back!
Originally Posted by jimdrew
we are getting the parts from a variety of companies.
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Jul 21, 2010, 08:52 PM
deltas are cool
AIR SALLY's Avatar
will we be able to get parts to convert our Extreme Screamers to this hub and motor?...i like the 1 pound 3 oz. weight savings.
Jul 21, 2010, 09:15 PM
Registered User
bri6672's Avatar
Originally Posted by JimDrew
It's actually closer to 16 pounds of thrust with the original motor as well as this motor.
OHHHH BOY! With the weight savings and that power a 1:1 ratio or better is looking really feasible for my Yellow F-18
Jul 21, 2010, 09:21 PM
Living the dream
flyarmy58's Avatar

Motor/Fan Unit

Just bought a Byron F16. How would this unit work for it I wonder. I would be willing to buy one if it preforms well. Just waiting for more product info. Thanks. Mike
Jul 21, 2010, 10:19 PM
We will not be offering any type of conversion kits, only fully assembled and tested units.
Jul 21, 2010, 10:21 PM
The performance will be nearly identical to the existing Dynamax Xtreme we have been selling. The biggest difference is that you are limited to 12 cells with this setup, and 18 cells with the bigger setup.
Jul 21, 2010, 10:38 PM
Registered User
Tempest's Avatar
Sweet! I'm eagerly watching Jim, as I have a few projects that could benefit from one (or two) of these.

Jul 21, 2010, 10:52 PM
Pursuit of Happiness
Ron101's Avatar
Jim nice job on the lighter weight, looks like a nice setup

The Dyn-E-Max scorpion has it beat by a few oz... but doesn't have all those support bearings. If this motor holds up well it's worth it for the bearing support.. a couple oz is nothing

The power is pretty much the same also.. great price two
Jul 22, 2010, 01:32 AM
Thanks Ron! We expect the production units to weigh 2-3oz less. The weight currently stated is with the stock Dynamax rotor (made of steel and aluminum) and our custom prop style collet. The new rotor that I designed is two pieces with the nose part being made of 7075 annodized aluminum and the back part out of 6061 aluminum. If you don't hold the front of the blades with something extremely strong, they will come apart at high RPMs! This is why Tom Cook uses a steel faceplate underneath the plastic cap. 6061 holding the leading edge of the blades is not enough. We don't have a prop style collet wth new design, instead, I use four 6-32 set screws with 4 notches in the motor shaft to prevent the possibility of the rotor coming off. This reduces our weight even more and should also help control run out.

We are not concerned about the motor holding up. The core is made by Hacker, and has a proven history in helicopter applications where there is no real cooling. We will offer a limited lifetime warranty on these setups, just like we do with our other products. As long as you are not physically abusing it (stuffing it into the ground), we will cover any defects in parts and workmanship. If you FOD the fan, we can repair it, but that would not be covered under warranty.
Jul 22, 2010, 06:08 AM
Registered User
baykah's Avatar
Is it possible to exchange the big fan with this one ?, I only ran the fan to check rotor rotation, no flight yet ?
As I'm planning 12S, I could benefit the weight reduction.
Jul 22, 2010, 09:24 AM
Watt me worry?
Madmax1965's Avatar
Jim.....Good move on your Hacker core...........I been flying hackers in EDF( Hacker Turbo in my F-86) and prop planes for a long time now and really like you can get parts.
Jim.........I now know what my power system will be for my F-8 Crusader which is back on my build table.
Jul 22, 2010, 10:42 AM
baykah, we have a list of over 150 people who want that fan! They are worth top dollar right now if you were to advertise it! We can't swap for any of the new fans though.
Jul 22, 2010, 10:57 AM
Renegade Fun Forever!!
rvincent's Avatar
Nothing wrong with the old ones You just can't get them is all! Sorry guys, I really wish I had more control in that matter, but I did my part and I still think it WAS the best option out there even though it was a bit heavy. The old factory and its reps were just a nightmare to work with, so a change was needed.

The new set up looks good Jim
Jul 22, 2010, 11:39 AM
Inciting Riots
village_idiot's Avatar
So did I read this correctly... This fan has blades that can be replaced when they become damaged? Otherwise wouldn't it have been better to machine the entire fan out of a billet of 7075?
Jul 22, 2010, 12:05 PM
EDF all the way!
bruff's Avatar
The rotor has replaceable blades. Damage one blade just replace it instead of the entire rotor.

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