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Old Jun 07, 2003, 11:55 PM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
4,914 Posts
Fan Fold Fun Jet

OK, here it is, the FFFJ. Just went out to the school parking lot and flew it under the lights. Man I should have took it to Lakehurst today and flew it in the blimp hanger (see indoor thread for that amazing place).

Anyway can you say hit the nail on the head. At full throttle nose down and rip jet style. Throttle back to 3/8, YES, 3/8 throttle and cruise around indoor style. Didn't try any stunts just because I forgot, did alot of high speed ripping, cool, followed by floating around.

Spec's
28" span
6 1/8" root 5 3/4" tip
22" long fuse
Vertical stab same Frog but will only have 1.5" rudder
Horizontal stab 10" span Frog stab
Airframe 1.4oz
AUW 5.4oz
Rudder/elevator/motor control
Distance between wing trailing edge and H.Stab 5 1/2"
Beveled bottom of wing trailing edge to point
Beveled and rounded top of leading edge of wing
1200 E-tex 2 cell
EDF 50B 2030x5 fan
GWS Pico gear
GWS 300E speed control
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Old Jun 07, 2003, 11:57 PM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
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Radio mess
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Old Jun 07, 2003, 11:57 PM
Foam Flyer
Depdog's Avatar
Stockbridge, Georgia, United States
Joined Jan 2003
2,931 Posts
I'll say it again , looks great.

Plans, plans, plans! Dwg, dxf please

Glenn
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Old Jun 07, 2003, 11:58 PM
Foam rules
Thatovalguy's Avatar
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3
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Old Jun 07, 2003, 11:58 PM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
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4
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Old Jun 08, 2003, 12:00 AM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
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Leading edge, note cabon strip in tail boom for strength.
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Last edited by Thatovalguy; Jun 08, 2003 at 12:22 AM.
Old Jun 08, 2003, 12:00 AM
Foam rules
Thatovalguy's Avatar
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Trailing edge
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Old Jun 08, 2003, 12:07 AM
Foam rules
Thatovalguy's Avatar
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Joined Jan 2003
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Will try to finish drawings tomorrow.

This thing is a blast. Have to thank Hippo and GPW for thier input on this project.
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Old Jun 08, 2003, 12:54 AM
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guyaneze's Avatar
gainesville FL
Joined Jan 2002
1,392 Posts
nice jet thatovalguy.

do you think one of these might help?
http://www.aeromicro.com/Catalog/aer...g__1554297.htm

and if i could build one of those i'd try using my etec 700 to save weight...and maybe not use a rudder servo....

heehee...i'm already thinking of how i'd modify mine and you haven't even let us know what u'll be doing planwise.
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Old Jun 08, 2003, 01:06 AM
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Depdog's Avatar
Stockbridge, Georgia, United States
Joined Jan 2003
2,931 Posts
You could use a coffee cup to make the main part of the nacell, and I have seen elmers glue nozels on the end of the motor, you could turn one out of foam to make it super light though. Would ducting it out the rear help with thrust at all?

Glenn
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Old Jun 08, 2003, 05:41 AM
Professional idiot
Hampshire, UK
Joined Jun 2002
3,119 Posts
Guyaneze/Depdog - The nacelle kit does apparently help from what I remember of the tests here when it came out. Most especially the round intake lip and the tail cone.

Also from what I remember reading these little fan units won't benefit from ducting past the unit. Something to do with them being high thrust low velocity or something like that.

If your interested the Jet forum has a wealth of information on EDF50 applications.

thatovalguy - Smart, I often wondered about trying ever since Q&EFI published the plans to the FanJet trainer last year. They have a stand way way off scale Vampire this month, similar construction style. I got sidetracked this week into building the FSK F-16 with an EDF50 instead.

--
Dave
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Old Jun 08, 2003, 08:56 AM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
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From the limited tests I did with the motor A inlet duct will help and is in the works right now, but it does not need it, outlet hurts performance. I was flying it around at 3/8 throttle last night with no problem. High speed, well if was fast enough to eat up the parking lot in no time, felt like I was always turning. So I am going to put one on but does it need it, no.

Thanks all for the nice words. I've always wanted a ducted fan sense going to a fan fly in out in Indiana and seeing Bob Violet doing unlimited verticals with his, but was always to cheap to buy. This might not do the vertical thing but it does meet the want.
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Last edited by Thatovalguy; Jun 08, 2003 at 09:04 AM.
Old Jun 08, 2003, 10:56 AM
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ARCHER7153's Avatar
West Palm Beach , FL, USA
Joined May 2001
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That's awsome, I can't wait to see the plans.
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Old Jun 08, 2003, 11:36 AM
Foam Flyer
Depdog's Avatar
Stockbridge, Georgia, United States
Joined Jan 2003
2,931 Posts
I thought I would never use this word, but that is so SWEEET, simple as heck and just too cool.

Thanks
Glenn
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Old Jun 08, 2003, 11:44 AM
Thats NOT indestructible
j8m8l's Avatar
London UK
Joined Apr 2002
1,448 Posts
I love it !

Somehow your design is more attractive then the "Trainer" one.
Mabie it is the tail !

Josh
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