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Old Dec 29, 2005, 01:49 PM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
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EDF-40 Vampire

Hi Folks. Happy New year to all.
Just found the forum and registered. Wish I had found it a week ago.
Couldn't resist posting the Vampire I have just created. It uses a stock EDF-40 and a 950MAh 3cell LiPo. Weight around 290 grams (Just shy of 10oz) all up weight. The motor/ fan is just enough to keep it airborne, so I will be looking at getting some more powerful motors. The first day out found it to be responsive to control aileron and elevator and good behavior at low speed. It was a useful intro in to the EDF, so the next one will be lighter and the two seat version. Hopefully the pic does it justice.
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Old Dec 29, 2005, 02:26 PM
go fly! no crashes!
Synwpn's Avatar
Honolulu, HI
Joined Jun 2003
2,845 Posts
nice little Vampire! and welcome to rcgroups!
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Old Dec 29, 2005, 02:58 PM
smug in granny panties
monkamarm2000's Avatar
NorCal Silicon Valley
Joined Aug 2002
11,778 Posts
very cool! And for somehting that size, maybe try a plate wing on it. The Vampires are very lofty by design so a plate wing would still give you plenty of lift but cut down on alot of the weight.

Barry
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Old Dec 29, 2005, 03:08 PM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
706 Posts
Hi Barry
Thats a good idea. I had not given it a thought when I drew the plan up, just used a traditional approach to the building. It will be tried on one of the next ones to be built.
Cheers.

Adrian
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Old Dec 29, 2005, 03:30 PM
Hey Now
Cocoa Beach, Florida
Joined Feb 2004
2,655 Posts
Great airplane!

Wow! I like it. Any plans for sale, kit possibilities? Have you looked into some of the 40mm fan setups we've been using?
1)Feigao 5300 and 5800
2)Medusa 5300
ThunderPower 3s 730mah pack

There are some people running the 40mm fan on 4s.

Welcome and what a cool airplane. Here are a couple useful threads on the 40mm fan.
http://www.rcgroups.com/forums/showthread.php?t=436471
http://www.rcgroups.com/forums/showthread.php?t=346283
http://www.rcgroups.com/forums/showthread.php?t=451843

Scott
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Old Dec 29, 2005, 04:18 PM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
706 Posts
Hi Scott.
Thanks for the Enthusiastic response. The plan was drawn up just before Christmas and the aircraft was thrown together to prove the concept, so there is still a way to go until the machine is a proven design. The main problem is just with the power at present which is just marginal, and due to poor duct design....actually the inlet air is drawn through the wing inlets, through the fuselage sides in to the fuselage void. I need to build in a proper inlet duct to the fan. I am also looking at getting some more powerful motors hence joining the forum to get some ideas.
Many thanks for the links.
Best wishes

Adrian
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Old Dec 29, 2005, 04:44 PM
Hey Now
Cocoa Beach, Florida
Joined Feb 2004
2,655 Posts
If it flies on the marginal power setup it will probably do pretty well on a Feigao 5300, 5800 or the Medusa 5300, a Castle Creations Phoenix 10 controller and a Thunder Power 3s 730mah battery. You may not need to change much.
The Stealth-E is pretty quick on one of the above setups. But it's hard to see. A cool semi scale 40mm jet would be great flying at slower speeds so you can see it.

See ya-Scott
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Old Dec 29, 2005, 08:01 PM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
13,517 Posts
Yup welcome to the Jets Forum.

Eric B.
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Old Dec 29, 2005, 09:17 PM
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Australia, SA, Adelaide
Joined Sep 2002
210 Posts
Adrian,

Looks great, what is the wing span? I use a feigao 5800 with the gws fan unit which produces excellent thrust for my nano mirage. Put one of this little motors in and you will see a vast improvement.
I am currently building(very slowly) a little Attacker which cannot even compare to your craftsmanship.

David
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Old Dec 30, 2005, 03:18 AM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
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The wingspan is 30", 8" root chord and 3" tip chord. The wing profile is a flat bottom section with max thickness around 40%. The size was governed more by tailpipe diameter (1.5" or 37mm) and tweaking the shape to retain the Vampire character.
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Old Jan 02, 2006, 10:41 AM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
706 Posts
Latest update

Hi Folks
Now glueing sticks on the T Bird Vampire. This one will take either the EDF 40 or 50 Units and will have proper ducting to the fan. The wood sizes are reduced where possible and a decent grade of wood and should help reduce the weight a little. See how this one goes

Adrian
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Old Jan 02, 2006, 12:05 PM
No Guts No Glory
kestrel2003's Avatar
Switzerland
Joined Feb 2003
1,224 Posts
elegant model

Your model is very elegant! Hope you can upgrade to more powerful engines soon. Keep us posted
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Old Jan 05, 2006, 04:37 PM
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Adrianh's Avatar
Chatteris, Cambs, UK
Joined Dec 2005
706 Posts
T-Bird progress

The Tbird wing and fuselage are almost complete. Paper used to make the inlet duct from the wing intakes to the fuselage centre. (Thinks I may qualify for a black belt in origami) Need to install cable runs and servo mounts. Tailbooms, fin and tailplane are next on the agenda.
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Old Jan 05, 2006, 07:45 PM
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Australia, SA, Adelaide
Joined Sep 2002
210 Posts
Adrian,

You are building very fast, makes my building skills look pretty ordinary. Keep up the good work. Cant wait till you fly this one, hope can give us plans and a video.

David
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Old Jan 05, 2006, 08:56 PM
Live to ride... and fly!
Tres Wright's Avatar
Forney, TX
Joined Mar 2002
15,165 Posts
Adrian, that's awesome!! It's on the big and heavy side for the EDF40 though, especially a stock one. I tried a stock EDF40 on 3 cells and man it got hot!! Anyway, as the others said the Feigao or Medusa would help a lot as they put out right at 6 oz. thrust. If you could reduce your wingspan and drop down to 8 oz. or less, I bet it would be a very respectable flyer. It is a looker, nice work!
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