Thread Tools
This thread is privately moderated by Number_6, who may elect to delete unwanted replies.
Jul 11, 2020, 07:54 AM
Ft Lauderdale
Number_6's Avatar
Thread OP

F117 80mm EDF

Foam Concept Jets has a PDF plan.
Foamboard/EDF (70mm). Not perfect scale
representation.... but it flies OK.

I used the plan but modified it slightly.
I retained elevons only, but changed
their shape. It will fly better if you
change to a more perpendicular
hinge line (across the wingtip),
and use their dihedral, as shown.

Their PDF was a good starting point,
and the CG is good as shown on
that PDF.

Fun project. Changed to 47”L x 44”W,
80mm, 6s. Arm launch, belly land.
Simple, cheap, and fun, but foam
board just doesn’t last long enough!

As you can imagine, a large flight
envelope doesn't exist. Best to stay
at, or near 'military power', use shallow
banks, and don't forget to add about
3/8"+ reflex at arm launch, then trim
some out on first pass.

Keep your airspeed up in shallow,
level banks or the nose will drop
fast under the horizon.

What else.... I gave this F117 a 'Nascar
fan/ pace car' paint job... 75 feet,
at 75 MPH detail. Dull black hides
the modified hinge line, dihedral,
and 30% wider body. This is definitely
not 'scale'... funny, I get more comments
at the field about this plane than
anything else.

Planning another larger F117.
Only change will be using
an EDF (or two) with more blades
for better sound than the
Delta-V 32 80mm fan.

Have fun.

F117 VVP (1 min 30 sec)

F117 VVP (1 min 30 sec)
Last edited by Number_6; Jul 11, 2020 at 09:24 AM.
Sign up now
to remove ads between posts

Quick Reply
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion F117 EDF Foam Board scratch build video Number_6 Flying Wings 0 Nov 18, 2019 10:00 AM
Discussion Freewing Avanti S 80mm 9 Blade EDF vs 80mm 12 Blade EDF DUNCA Electric Ducted Fan Jet Talk 11 Jan 07, 2019 07:41 PM
New Product NEW Freewing F-14 twin 80mm EDF (Vendor-independent) SU-4ever Foamy EDFs 186 Feb 07, 2017 05:47 PM
Build Log F117 Nighthawk with EDF marek rokowski Foamies (Scratchbuilt) 7 Jan 18, 2016 01:54 PM