Yet another V22 project

[BigS]

Here is one of my projects I am working on.

It is a 1/24 scale V22 Opsrey. I have all the electronics apart from having built the cdrom motors.

The pic is beside a 1/24 Huey. The wing structure is carbon arrow shaft and will be used in the final Vtol, the rest is for the plug to make some moulds off.

More details soon. :cool:

Shannon.

[v22chap]

Hey Shannon ,, looking good man ,,keep the pix coming and keep working on it . :)
Larry

[MustangAce17]

SOOOOO count me in for one of these!!!!!!!!! this is awesomeeeeeeeeee a little excited lol! pm if i can get the molds! thanks! im working on a vtol to!

[BigS]

Here's some more progress, I'm sorting out how to fit the motors and controls inside the scale cowling.

I should be able to fit the whole lot in there :cool:

The blue HS-55 servo is for the elevator and the black GWS servo for the collective. The collective servo moves the elevator servo at the same time, removing the need for mixing (theres enough of that already :rolleyes: ).

The angle of the servo mounting is made so the swash has the correct phasing for the rotorhead.

I need to machine some custom swashplates so I can reduce their diameter slightly, otherwise they won't fit in the cowling.

Shannon.

[BigS]

MustangAce17,

Where in the world are you? Just wondering :)
I am considering doing plans for this when I get it finished, I would also consider selling mouldings of it also :D .

Shannon.

[MustangAce17]

im in Ocala,Florida! cler across the world!!!!!! lol

[MustangAce17]

im totaly serious i will come up with the $ to ship this puppy!

[BigS]

You'll have to wait till I finish one first :p THEN I can think about making more of them :D

Shannon.

[MustangAce17]

lol ill wait subscribing!

[BigS]

Ive been doing some work on the nacelle pitch adjustment mechanism.

Heres a few pics. I am using aluminium lined carbon tube for the torsion rods, they should be nice and stiff. I have yet to work out how to connect the nacelle pitch rods to their outer 3mm steel pivot shafts. I might just pin them.

The center area of the wing will house the roll gyro (becomes the yaw gyro in fff) and also the ESC's for the brushless motors.

Shannon.

[MustangAce17]

hey its 12:31 PM here lol

[BigS]

Heres the jackscrew for the nacelle tilt mechanism, Its a 360 degree modified HS-55 with an external pot. It also has been sped up by the removal of two gears an a threaded rod put on the output shaft.
Im not sure how much torque it will need but it is really only tilting the body in flight.

Shannon.

[v22chap]

Love the balsa work you did on the pylons .and the tooth pick push rods to the swash (great idea) .. is the fuse also balsa ???
Larry

[BigS]

Larry, the fuse is foam filled balsa also, I may glass it before taking the molds off them though.

How fast do the nacelles need to tilt? mine take about 4 seconds for 90 degrees.

Shannon.

[v22chap]

That is pretty fast ,,but might be o.k. for that small and light of bird. Mine tilts 30 degrees in 4 sec. and stops ,,then I can finish to airplane mode a little at a time with a rotary knob but I am carring around 20 lbs :eek: and have to sneak up on the conversion. My guess is you will not have to do that .Just point the nose down slightly and transition right on into airplane mode.
Larry

[BigS]

Larry,

how do you mix your roll into rudder when you transition? I have been using the 2 osprey models in FMS and the airplane one is really hard to fly just using heli roll and rudder unchanged in airplane mode. I mixed some (heli)roll into the (heli) rudder and that made it far easier to fly in airplane mode, couldnt really use the (heli)rudder as it rolls a bit fast. The sticks also take a lot of getting used to when transitioned.

Shannon.

[BigS]

Heres some more I got done last night but was too dark to get good pics.

The carbon nacelle pitch rod will have 2 pieces of ply from it to locate the brass tube, instead of just the one. I havent done anything to the osprey today as I have been out surfing :cool: .

Shannon.

[v22chap]

Surfing ??? ;) :rolleyes: :cool: If I did that it would have to be "SNOW" surfing :eek: :D
Well actually I have not been all the way into airplane mode ,,just 60 degree position (which from 90 deg straight up is only really 30 degrees from that point) which is the position that is the optimal between heli and airplane mode ..The full scale guys told me they spend a lot of time in this area as it is the birds safe area and used a lot for low level manuvering .
Any how I had planned on using the heli roll with a gyro on the tilt arm to control the airplane yaw in forward flight and was going to try and limit the aileron roll atv some and actually shut off the heli rudder .I do that by mixing rudder into an aux channel and then using the stunt (JR ) ,,or mode switch (futaba I believe its called ) switch.But now Joe of Model Tech products is making a mixer that we hope will do the roll /yaw change for us when we transition .It is a hard thing to do manually and probably will never be quite like it should as we don't have all the computer controlled stuff onboard to do it all and not even any of the pilots or mechanics at Pax River could tell me when the change takes place on the real one and what changes.
Larry

[BigS]

From what I have read on the transition, it appears that the change from roll to yaw is continously adjusted across the transition. i,e, when in 60 degree mode the aicraft will stil roll axially. I am not 100% on this but thats what the way it appears to me, and wouldn't really make sense to do it any other way.

I wish I had a Multiplex profi 4000 TX, then this mixing would be easy :D

Shannon

[v22chap]

Yep ,,that is the way I have it figured ,,I actually had first tried to transition with heli yaw in place and it didn't seem to make any difference ,,,,,,,it still headed for the ground asap. :eek: ;) :rolleyes: :D This was back before I was using twisted blades and couldn't get enough forward speed to become wingborne.But the bird didn't spiral down but was controlable all the way thru.

I don't know if a Multiplex profi 4000 TX would help much or not .I had the Royal evo 12 and it didn't let me do free programing in the heli type and I had to go to airplane mode to do any thing and then it used up two more mixes to get the heli throttle /pitch mix .Then if I changed the curve on one head I had to go to the other mix and change the curve there also ...it was just a mess. I am going back to my JR 10 X this next bird and I also hope to have an onboard mixer to do all that I need done ..from Joe Orlando at Tech Model Products. He has a new TH-2 GP board that he is working on with Rudy and I that hopefully will be progamable enough to meet everyones need as far as VTOL planes go.Hope to have more information for you shortly as Joe has been working on it now for a few weeks and will hopefully have a test model for Rudy and I to try here soon.
Larry

[BigS]

Heres some more done (a little :rolleyes: ) The nacelle pitch shaft joiner is nearly complete and the gyro has its test mount.

And does anyone know what a good airfoil for the proprotors on this would be? scale??

Shannon.

[BigS]

Update..

Changed my mind on this V-22 but will start on a slightly bigger one using Trex parts mainly due to the fact that the cost of parts for Trex based opsrey will be about the same or cheaper than a micro one. And probably due to that I have a vast supply of spares for my Trex :p :rolleyes: :D

Shannon.