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Sep 03, 2003, 07:01 AM
Fly Brushless!
Hawker's Avatar
Thread OP

DC-9 EDF-50 that ROCKS!

47" Long
38" Wingspan
GWS EDF 50BH (11.1V motor w/ 5 bladed fan)*2 = 7.39oz of thrust
1200mah 11.1V Lipo battery
AUW - 10.45 oz's. Amazing!
>23min flight time

5mm thick styroboard for the inside donuts, 1mm foam skin.

Check it out (4 pages). What a fantastic building method this guy
has. It's wonderful. I'm going to try several planes this way,
using the new higher powered EDF-50BH with 5 blade fans.

Dude, you rock!

Yasuhiro Ueno
Okayama city, Japan
Last edited by Hawker; Sep 21, 2005 at 10:01 PM.
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Sep 03, 2003, 07:07 AM
Fly Brushless!
Hawker's Avatar
Thread OP
I just got off a 12 hour shift, but darn it this DC-9 of his has got
me totally excited about building my EDF jets using this same
construction methods. It looks very simple to do and yet flys
extremely well due to lightweight building.

I hope the rest of you airliner/military cargo nuts can see the
potential this has for all of us. Totally cool. In fact this method of
construction would be awesome for ANY EDF-50-ish design.

Here's the REAL kicker! 23 minute flight times using Kokams!
Wow! Plus he estimates 20% charge left after that. Amazing.
My AN-225 (on this page) if built this same way would be
incredible! My way was much too heavy. Must make a version 2
eventually but I think a C-5, C-17 will be first. Since I'm around
them everyday.
Last edited by Hawker; Sep 11, 2003 at 10:17 PM.
Sep 03, 2003, 07:56 AM
Registered User
Carter's Avatar
Wow! This guy is on to something.
Sep 03, 2003, 09:08 AM
Baboon McGoon
ClipperBill's Avatar
Wow!!!! Absolutely phenomenal. This guy really is on to something. Thanks for sharing Hawker.
Sep 03, 2003, 09:12 AM
Fly Brushless!
Hawker's Avatar
Thread OP
The most amazing part of this to me is the 1mm thick foam skin!
That's like, nothing, zero weight! Perfect for small EDFs.

It really gets your imagination going doesn't it? Thinking of the
countless possibilites. That DC-9 looks so cool as it is and it's
not even painted yet. Too cool.
Last edited by Hawker; Sep 11, 2003 at 10:17 PM.
Sep 03, 2003, 11:20 AM
Ductedfann's Avatar
That is a good way to form zepron, to make an edf 50 jets.

I have been using foam skeletons similar, but not the same, for my low weight fiberglass reinforcement trials.
Sep 03, 2003, 12:17 PM

looks great

what glue are you using to glue the foam together?

i use probond, but I hate waiting for it to dry.


ryan d.
Sep 03, 2003, 04:28 PM
Fly Brushless!
Hawker's Avatar
Thread OP
I'm not sure about the best glue to use. I know 3M is good for
sandwiching 2- 3mm pieces together, but for the rest, not sure.

Here's what I just ordered through DepronUSA. Should make a
good 4 airplanes easily. I'm planning on 35-40" wingspans with
lengths of approx 40 to 45 inches.

We have received your order for the following:
================================================== ======================
Item # Description QTY Amount
D61319W 6mm White Depron "6mm x 13" 8 24.00
x 19" White
D61524G 6mm Grey Depron "6mm x 15" x 8 28.00
24" Grey"
D21524W 2mm White Depron "2mm x 15" 10 20.00
x 24" Whit
D22430W 2mm White Depron "2mm x 24" 10 40.00
x 30" Whit
D63048GOS Full Sheets--Oversize Shipme 2 28.00
nts "6mm x 30 x 48
Sub Total 140.00
Tax 0.00
Shipping & Handling 0.00

I know the shipping will probably be pretty high due to the 2
oversize pieces, but those will be the outline/frame of the
fuselage. I'd rather keep it one complete piece than smaller ones
glued together. So picture that as a view looking down from the
top, the frame. Then the doughnut/bulkheads will be cut from
the smaller 6 mm pieces. I'm going to mix in gray here and there
in the frame just to make it easier to see certain areas for servo
mounting, etc.

When I do a DC-9 or B717, I think I may go a little smaller than
he did so the fans won't have so much model to push around.
For 2 EDF-50's his plane is big! Pretty impressive. I'm surprised
it does so well, but obviously it's due to the 11.5 oz weight.
Last edited by Hawker; Sep 03, 2003 at 04:32 PM.
Sep 03, 2003, 04:33 PM
Baboon McGoon
ClipperBill's Avatar
Am curious about the more powerful EDF-50BH fans mentioned in the article used as an upgrade to the EDF-50s. Is that an Asian variant of the EDF-55 soon to be released by GWS?
Sep 03, 2003, 04:35 PM
Fly Brushless!
Hawker's Avatar
Thread OP
I'm not sure, but I did see ONE for sale on ebay today.
Sep 03, 2003, 07:25 PM
Nickel what?
Phreakish's Avatar
the edf-55 is a whole new animal... its 55mm diameter with a bigger motor and new fan and shroud... will be a lot more powerful than the 50...
Sep 03, 2003, 07:32 PM
Does that Takeoff from the ground?? You donīt need to throw it?? This is amazing very very nice stuff this guy has done--
Sep 03, 2003, 08:08 PM
Fly Brushless!
Hawker's Avatar
Thread OP
Yeah, by the time I'm back from my trip hopefully that EDF-55 and
other new fans will be available. Looking forward to it!

Yes, I do believe this is ROG. He say's it has as much climb power
as any twin speed 400 (now that's impressive!). Again, the 11.5
oz weight being the huge contributor here.
Last edited by Hawker; Sep 11, 2003 at 10:17 PM.
Sep 03, 2003, 08:18 PM
Fly Brushless!
Hawker's Avatar
Thread OP
To be honest with everyone, this type of progress with a small EDF airliner is what I've been waiting for. Now I'm getting ready to get all the supplies and run with this! Who knows, early next year if my plans work out I may end up kitting something.
Last edited by Hawker; Sep 03, 2003 at 08:23 PM.
Sep 03, 2003, 09:08 PM
Live to ride... and fly!
Tres Wright's Avatar
Wow, that is amazing! 11.4 ounces on a 38" wingspan, impressive. He doesn't say what fans he replaced the EDF-50's with, but they're running on 3 cells so they must be more robust motors than the 50's. Neat construction technique!

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