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Old Jul 10, 2011, 03:54 AM
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Dynamax fan! Cad drawings

Does anyone have a bashed, beated, used, cheap Dynamax fan? Or know where i can get one under $300?

Also, Does anyone have cad drawings for the fan? or know anyone that may have some.
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Old Jul 10, 2011, 07:52 AM
Were's the plane?
flyboy1945's Avatar
Warren,Ohio
Joined Feb 2005
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http://www.jetmodelproducts.com/dynamax.htm
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Old Jul 10, 2011, 11:10 AM
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Trabuco Canyon, CA
Joined Nov 2000
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Are you asking about buying just the fan unit itself, or buying a fan unit with an electric motor already installed?
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Old Jul 11, 2011, 01:45 AM
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Pasadena, CA
Joined Mar 2007
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im also interested in getting just the fan.
is there a vendor that sells mount adaptors for electric motors?
and do these adaptors bolt directly onto the housing without modification?
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Old Jul 11, 2011, 02:37 AM
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CRCJA's Avatar
Green Valley, AZ
Joined Aug 2004
2,016 Posts
Conversion

You might be able to start with this

http://www.ejf.com/index.php?main_pa...roducts_id=877

Ralph

Quote:
Originally Posted by Brutikus View Post
im also interested in getting just the fan.
is there a vendor that sells mount adaptors for electric motors?
and do these adaptors bolt directly onto the housing without modification?
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Old Jul 11, 2011, 05:43 AM
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Joined Oct 2010
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Yeah it was just for the fan itself. Actually if i can get a hold of just the impeller it would be even better
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Old Jul 11, 2011, 01:00 PM
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DanSavage's Avatar
Trabuco Canyon, CA
Joined Nov 2000
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I have an old rotor/impeller and/or housing I could sell to you.

I'll take a couple of pics and post them, then we can talk.

Dan
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Old Jul 11, 2011, 02:18 PM
BladeRunner
Indianapolis, indiana
Joined Dec 2007
297 Posts
Dynamax rotor and hub adapter

Quote:
Originally Posted by Brutikus View Post
im also interested in getting just the fan.
is there a vendor that sells mount adaptors for electric motors?
and do these adaptors bolt directly onto the housing without modification?
I manufacture a rotor and motor adapter you might want to consider. They are 100% CNC machined from the best materials available. No modifications necessary just assembly.

Fred / Dyn-E-Max.com
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Last edited by bladexz2; Jul 11, 2011 at 02:43 PM.
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Old Jul 11, 2011, 09:51 PM
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Pasadena, CA
Joined Mar 2007
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sweet!
just what im looking for.

do you carry the fan blades to mount onto the rotor?
also dont see the SuperCool housing for the 1527 on the site.
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Old Jul 11, 2011, 11:58 PM
BladeRunner
Indianapolis, indiana
Joined Dec 2007
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Quote:
Originally Posted by Brutikus View Post
sweet!
just what im looking for.

do you carry the fan blades to mount onto the rotor?
also dont see the SuperCool housing for the 1527 on the site.

Brutikus
call me 317-293-6449

Fred / Dyn-E-Max.com
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Old Jul 12, 2011, 12:07 AM
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Trabuco Canyon, CA
Joined Nov 2000
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Hi Cruze64,

Here's the pics of the used fan I've got.

The shroud has been crashed and repaired with fiberglass cloth wrapped around the outside to stiffen it up. It's pretty rugged, but it is usable.

The rotor is complete and is in pretty good shape. Two of the blades have FOD, but overall, it's in good shape.

There are only 6 of 14 short stators and stator bolts. There are both long stators and stator bolts and stator mounting flanges.

The center body is in new condition and has never been used.

Missing is the prop adapter and washer (rotor bolt and washer).

A new fan from Tom Cook costs $250.

I priced all the parts shown here and to replace them would cost about the same as a new fan.

A new rotor alone would cost $145. I'm willing to let this one go for $125. If you want to buy everything shown, I'd be willing to let it go for $175.

I've also got a NIB Dynamax. I could let that go for $225.

Dan
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Old Jul 12, 2011, 12:41 AM
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Trabuco Canyon, CA
Joined Nov 2000
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Here's one of my glow Dynamax fans that I've already converted using the EJF adapter, a Scorpion HK-5035-630KV motor and Great Planes GPMQ4968 prop adapter. The rest of the parts are stock Dynamax.

I've run the fan without an inlet lip and it turns right around 27K rpm and pulls about 5100W of power.
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Old Aug 29, 2011, 12:27 PM
'Sit vis nobiscum'
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United States, KY, Union
Joined Jun 2008
312 Posts
Hey Dan,

How does the adapter mount into the Dynamax housing? Did you cut off the glow engine mount? This is the picture and info I have been looking for.
Thanks for the post.
Matt Petrie
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Old Aug 29, 2011, 01:41 PM
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DanSavage's Avatar
Trabuco Canyon, CA
Joined Nov 2000
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Yes. If you're going to use the stock center body, then you have to cut the back part off.

I had to cut a lot more off to accommodate the original motor I planned to use. (Hacker Electro-Turbine)

I changed motors to the Scorpion HK4035-630, which is smaller, so it would actually fit inside the center body. But, since my center body was already bobbed, I just used it as is.

The stock method for the EJF adapter is to bolt it into place using the long-shroud stator bolts. Although a lot of guys, like Bob Ruff, had successfully used just these to hold the adapter into place, I felt more comfortable adding some extra screws.

The OD of the EJF adapter is also about 1/32" smaller than the inside of the Dynamax center body. To make sure the adapter was centered and fit properly I wrapped a 1/64" ply strip around the adapter.

Like I say, a lot of other guys have successfully used this adapter without this extra work. I did this to make myself feel comfortable.

If you're interested, I can post a couple of pics of my fan that show more details of the adapter installation.
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Old Aug 29, 2011, 01:47 PM
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United States, KY, Union
Joined Jun 2008
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Thanks Dan!

Valuable info! I would like to see what you have done if not too much trouble.
Thanks,
Matt
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