Star Wars X-wing...can Peter make it and Josh 'laser' it into a speedbuild kit?

rcspaceflight

creator of virtual planes
The RC Desk Pilot version I made with actuating wings I have the pivot point of the wings in the center. A single point inside of the fuselage. Which does look correct. But as Corbarrad says, it would be difficult to actually do because of the gaps it creates. Or would it be easier because it would be a single hinge?
 

SteevyT

Senior Member
I could model it up as a single hinge, trying to actually build it might be tricky I think though. Moving the hinge position is really just a matter of changing the wings and the part they are attached to. The actual mechanism shouldn't really care where the wings hinge at.
 

rcspaceflight

creator of virtual planes
I was thinking that if you used a carbon fiber rod / arrow shaft as the hinge point, then you could basically make it a slow stick with a faux fuselage around it just for looks. Well, at least the arrow shaft as the fixed spar that bares most of the weight / forces.

Or maybe use a square dowel and actual cabinet hinges as the hinges. Then use hobby ply or craft sticks to mount the hinges to the wings. Similar to what I did for the still unfinished folding wings plane I built. http://forum.flitetest.com/showthre...-Wing-FT-Plane&p=143036&viewfull=1#post143036
 

Kurt0326

Your ADD Care Bear
Mentor
Well they're supposed to do a segment on can it fly so its a possibility that you could do it. Easiest way to get an answer is to call in and leave a message for the podcasts
 

Corbarrad

Active member
Here's something I prepared earlier:
Sketch.jpg

Actually here's something I scribbled in the back of my calendar during lunch...

The "Retracted"/"Extended" marks point to where the servo mechanism would attach.
 
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SteevyT

Senior Member
I fixed the wing hinge and made a better mechanism. Due to singularities, it should produce very little torque on the servo both in the open and closed positions. No springs needed. Unfortunately, due to issues with Simulate, I can only show half of the mechanism actually assembled. It should be fairly obvious what the other half looks like though, just rotate the shown half 180 degrees.

Overview of the new design.
http://i.imgur.com/UJ2osKc.gifv

Close up of the mechanism. Notice how the links become straight lines both at full open and full close, preventing torque from actually being applied to the servo in the center.
http://i.imgur.com/TQm8gIa.gifv

Really all that's left with that is adjusting servo arm length (there's enough rotation there that the arm could be shorter and still get the full movement out of the wings, this would lower the torque needed out of the servo) and make the wing shape more like what is actually on the x-wing. These were just rough models I whipped up to show a basic idea.
 
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Corbarrad

Active member
I fixed the wing hinge and made a better mechanism. Due to singularities, it should produce very little torque on the servo both in the open and closed positions. No springs needed. Unfortunately, due to issues with Simulate, I can only show half of the mechanism actually assembled. It should be fairly obvious what the other half looks like though, just rotate the shown half 180 degrees.

Really all that's left with that is adjusting servo arm length (there's enough rotation there that the arm could be shorter and still get the full movement out of the wings, this would lower the torque needed out of the servo) and make the wing shape more like what is actually on the x-wing. These were just rough models I whipped up to show a basic idea.

Our designs are pretty similar, actually. The main difference is that I added a "step" in the middle of my hinge parts so the wings can lay flat in their closed position.

The actuator bit, which I havend drawn yet is pretty similar as well, though I chose to go with a slotted disk to move the pushrods, since that will eliminate most oof the torque throughout the whole range of movement as well as reducing the parts count.

I left the rear end open so there was room for an EDF inbetween the wings. In my mind I would use the X-wing engine intakes to funnel air into the center section just above and below the hinge braces.

I'm saying "in my mind" because I'm not that familiar with EDFs and unsure whether that would give me a big enough percentage of FSA for the unit to actually produce thrust.

Anyway, the EDF would blow out the back of the fuselage instad of the four little nozzles on the wing which should help a little. If not, you could still cut a cheater hole in the bottom of the fuselage, where the nose section is faired over to the main fuselage.
 

rcspaceflight

creator of virtual planes
I have a 50mm EDF and it can't really power anything. 4 would mean 4 times the thrust (same top speed), but I think 4 50mm EDFs would be the best set up vs. size.

The X-Wing I made in Sketchup for RC Desk Pilot has a wingspan of 3' 2.5" or 38.5". The big part of the engine (the front) is 3(9/16)". Or a 90mm hole for the EDF with a wingspan of 978mm. 70mm EDFs should be perfectly fine and look good with a 40" wingspan.

Although the exit holes of the engines is a lot smaller than the front.
xwing.jpg
xwing2.jpg
 

h1975

Junior Member
I have a 50mm EDF and it can't really power anything. 4 would mean 4 times the thrust (same top speed), but I think 4 50mm EDFs would be the best set up vs. size.

The X-Wing I made in Sketchup for RC Desk Pilot has a wingspan of 3' 2.5" or 38.5". The big part of the engine (the front) is 3(9/16)". Or a 90mm hole for the EDF with a wingspan of 978mm. 70mm EDFs should be perfectly fine and look good with a 40" wingspan.

Although the exit holes of the engines is a lot smaller than the front.
View attachment 39810
View attachment 39811

Keep up the good work!!
 

rcspaceflight

creator of virtual planes
I know from the profile X-Wing I built that the CG is right on the leading edge of the wings. Other people have come to the same conclusion.

It wouldn't be difficult for me to alter my Sketchup X-Wing I made for RC Desk Pilot into plans for a DTFB plane. I'll thinking about building it (eventually) but I cannot afford four EDFs so it will have to be a pusher prop configuration.

I'm just wondering about the guns. To be honest, it looks stupid without the guns. Maybe a CF arrow tubing for the guns? It would be nice for the guns to outlast the plane so they would be reusable.
 

Lupus

Member
Just want to subscribe to this thread. Big Star Wars Fan. I don't know enough about building yet to comment reasonably but I am looking forward to some finished free plans for this.

I love the idea of it being a ducted fan model. A prop out the back or front of an X-Wing just would not look right. Just to ask, would it be possible to use some mixing to get differential thrust out of the ducted fans to manage control rather than use traditional control surfaces?
 

Corbarrad

Active member
also some green LED's for the lasers at the wingpylons.

Hate to look any more like a star wars geek than I already do, but the rebel ships had red lasers in the original trilogy, only Imperials fired green streaks of somehow-slower-than-light-lasers.
 

Kurt0326

Your ADD Care Bear
Mentor
Hate to look any more like a star wars geek than I already do, but the rebel ships had red lasers in the original trilogy, only Imperials fired green streaks of somehow-slower-than-light-lasers.

Your totally right... Argh don't you guys get it right, sigh. Any real fan would have got that... Lol :p