|Aug 26, 2012, 11:31 AM|
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
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
may try a different color scheme
|Aug 29, 2012, 12:35 PM|
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|
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
|Sep 10, 2012, 12:17 PM|
Joined Aug 2011
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|
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. http://www.rcgroups.com/forums/showthread.php?t=1727632
|Sep 13, 2012, 11:46 PM|
Just an Update and as requested some too.
sorry theres no videographer during its maiden but its stable
|Sep 14, 2012, 06:05 PM|
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|
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
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)
|Sep 18, 2012, 04:57 AM|
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!
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