**EPP Peregrine, FFF-Eagle, Dragons and other Bird Planes** - Page 125 - RC Groups
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Aug 26, 2012, 11:31 AM
Scratchbuild Aviation
speedactyl's Avatar
building a successor to my old Bird more than a year and its really bang-up

Speedactyl PX22 & Speedactyl PX22-A

Successor to Speedactyl PX22 meet PX22-A
an more streamline plane a more hot rod looks improve materials and construction

hopefully modernize electronics

Succesor To Speedactyl Jet
update :
EPP Material
an more sweptback wings may give a WS of 36inch
Addition of Ailerons
minor changes to the nose section
better structural materials
move back the motor Aft of the Main Wing to reduce noise and turbulence unless you want to grab attention
Lighter electronics
may try a different color scheme
Last edited by speedactyl; Aug 26, 2012 at 11:40 AM.
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Aug 26, 2012, 11:36 AM
Registered User
G-LO's Avatar
I Like that!
Aug 28, 2012, 01:52 AM
Closed Account
How to become a cyborg

FPV Mechanical Headtracker (2 min 30 sec)
Aug 29, 2012, 12:35 PM
Where'd The Wise Men Go?!?
AC5FF's Avatar

I've watched this thread for ages and I gotta say I absolutely LOVE this design!
I don't remember seeing it before though. Any chance you have plans anywhere???
Aug 29, 2012, 07:58 PM
Scratchbuild Aviation
speedactyl's Avatar
Will try to make one. Kinda challenge because when i build these there weren't any. I just base it on natural dimension, golden ratios, & a few scifi ships for inspiration. and did my cutting like an artist painting on blank canvas.

dint realize it came out beautifully

its like this an Pterodactyl is already cool but add warp engines on it and you spells trouble

if there are any additional design features to add, maybe you can suggest
Last edited by speedactyl; Aug 30, 2012 at 11:41 PM.
Sep 03, 2012, 04:44 PM
Registered User
Joel K. Scholz's Avatar
Sep 04, 2012, 01:53 PM
Registered User
1967250s's Avatar
Reverse it, make it a canard?
Sep 05, 2012, 12:21 AM
Scratchbuild Aviation
speedactyl's Avatar
possible in some way

BTW would the turnigy 2211-2300 hold an 6x4 prop on an 3s battery? with an 10 A esc frear of overloadin things
Sep 10, 2012, 12:17 PM
Registered User
So I built a 42" FFF eagle with a BW 1300 motor and went out testing it today. For the wing I used 2 sheets of EPP, 10mm thick each. I made the KF airfoil with one step on top at around 50%. The AUW ended up around 340g. The problem is that when I cut the throttle the bird sinks very fast and doesnt glide very well, sloping is probably impossible. The wind was blowing around 3-4m/s. Is the wing too thick or doesnt this airfoil cut it?
Sep 11, 2012, 12:11 PM
Registered User
Joel K. Scholz's Avatar
As this thread is what has inspired me to try my hand at a bird plane, I am attaching a link to my build thread. https://www.rcgroups.com/forums/show....php?t=1727632
Sep 13, 2012, 11:46 PM
Scratchbuild Aviation
speedactyl's Avatar
Just an Update and as requested some too.


sorry theres no videographer during its maiden but its stable
Sep 14, 2012, 06:05 PM
Where'd The Wise Men Go?!?
AC5FF's Avatar

Congrats on the successful maiden flight!! Hopefully you can get someone out with you to get a video of it in the air!

Can you post a frontal view of your creation?
In the earlier posts, expecially with the blue one, the wings have a gull look to them. Kind of hard (for me) to tell if this is an optical illusion or if the wings are actually gull shaped.

What's the wingspan?
The nose looks really sleek, but fragile; any worries on it snapping free during a rough landing?
Sep 14, 2012, 08:38 PM
Scratchbuild Aviation
speedactyl's Avatar
The links are posted To the pdf
Btw this recent plane has the epp wrap in tape then reinforce with BBQ sticks on the inside the 5mm epp is use as skin to produce the nose cone proven to survive a head on only if you keep the AUW lighter then 300g

WS 36 inch
AUW 280g

Note lesson learn from the blue model is to add internal support structure from the neck to the nose
To reduce the chance of snapping on hard landings

My early model the blue one has a dihedral of 10 degrees from the sweep part (inverted gull) some times in the air the whole thing can get to 15 degrees

The recent one the unpainted one is full straight like a plank but the spar only reaches one haft of the sweep and epp foam naturally bends creating the dihedral effect

will find it I know I had it some where (pictures)

Last edited by speedactyl; Sep 15, 2012 at 06:28 AM.
Sep 18, 2012, 12:00 AM
Registered User
Joel K. Scholz's Avatar
Kestrel progress.
Sep 18, 2012, 04:57 AM
Luis Claudio - Rio - Brazil
Luis_Claudio's Avatar
Amazing project I would like so much to scratchbuild one for me,
once I love this bird and have a real one here a couple of months!

Could you post details about the building progress and share the plans?

Here some pictures from Eros, our Kestrel, Falco Sparverius!

Originally Posted by Joel K. Scholz
Kestrel progress.

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