He wasn't asking about the pitot tube. He's talking about the barometric
altitude sensor. Generally speaking it is recommended to be installed
in a "sealed chamber" with a single port to the outside that is
neither in the front or back of the craft (thus usually opening
to the side) with no obstructions (anything that'd cause turbulence
and buffeting) upwind of the port.

Personally I wouldn't worry too much about ram air effect into
the fuse as I suspect it's quite negligible, but I don't have such a sensor
so can't say for sure. The chamber under the wing is nice, but
it has openings in the bottom and the rear so it's nowhere near sealed.

ian

It is hard to find a neutral point where the environmental barometric pressure is equivalent to the outside in a flow free situation on any plane or structure that changes velocity (speed) and angles.

Originally Posted by Vlodek9

Hi all,
Well I do not post much because your guys videos put me to shame. But this last Sunday I had some positive test results with my SW, new DX18 and ET OSD. I know this video may be a bit simple and nothing exciting but for me its progress. So here is my quick update.

http://www.youtube.com/watch?v=HJCjg0BJbnU

you nailed the landing smack on the centre line

Skywalker 1900

skywalker and clouds .mp4 (17 min 43 sec)

My first Skywalker is almost complete...or so I thought.

I was really careful when gluing the two fuselage halves together, but the tail looks twisted. The vertical stabilizer is perpendicular to the horizontal stabilizer, but the horizontal stabilizer does not line up with the wing. I have seen several Skywalkers on the web with the same problem. I should have been more careful when joining the halves!

Is it possible to do something about it?

You can always just use some tape in a spiral fashion around the boom to straighten it out to one side. Who knows, it could have been twisted in shipment or something.

what happens when you roll the plane on the other side? Does the horizontal stabilizer tilt the other way?

If yes then it's a typical rigidity problem - Skywalker style!

There are many proposed solutions to this, depending on how much time and effort do you feel like investing to correct it.

First of all, did you properly glue the carbon tube in the tail boom's channel? If not the you should - It's never too late. Just make some small holes in the EPO foam every inch or so and inject CA with a needle. Stick with the needle if you want.

Then you can use internal (more or external carbon fiber scafolding to further increase rigidity. The easiest way is to glue 3-5mm rods diagonally between the tail boom and horizontal stabilizer's lower surface - close to the tips.
Of course you'll have to push both rod's ends a few mm into the foam.

Good luck with your maiden!

/Dimitrios

Originally Posted by RC4YFPV

Yes,Now Black EPO Skywalker for $100,end of 31,August.Only left about 15 days,
http://www.rc4y.com/skywalker-1880-e...ery-p-472.html
don't hesitate,if you want to buy.
You can see the pictures, it shows different.

I need to order another Skywalker.

What do you guys think about this offer? I have read somewhere that's a scam webshop. They do take Paypal for protection though...

What's the verdict?

/Dimitrios

thanks for the help...I'm going to try it in the main fuse cabin and compare with GPS to see if there any major deviations.

Originally Posted by Daemon

He wasn't asking about the pitot tube. He's talking about the barometric
altitude sensor. Generally speaking it is recommended to be installed
in a "sealed chamber" with a single port to the outside that is
neither in the front or back of the craft (thus usually opening
to the side) with no obstructions (anything that'd cause turbulence
and buffeting) upwind of the port.

Personally I wouldn't worry too much about ram air effect into
the fuse as I suspect it's quite negligible, but I don't have such a sensor
so can't say for sure. The chamber under the wing is nice, but
it has openings in the bottom and the rear so it's nowhere near sealed.

ian

Originally Posted by Dimitris76

what happens when you roll the plane on the other side? Does the horizontal stabilizer tilt the other way?

If yes then it's a typical rigidity problem - Skywalker style!

There are many proposed solutions to this, depending on how much time and effort do you feel like investing to correct it.

First of all, did you properly glue the carbon tube in the tail boom's channel? If not the you should - It's never too late. Just make some small holes in the EPO foam every inch or so and inject CA with a needle. Stick with the needle if you want.

Then you can use internal (more or external carbon fiber scafolding to further increase rigidity. The easiest way is to glue 3-5mm rods diagonally between the tail boom and horizontal stabilizer's lower surface - close to the tips.
Of course you'll have to push both rod's ends a few mm into the foam.

Good luck with your maiden!

/Dimitrios

I actually used a 3mm x10mm x ~100mm CF rod in my Vertical stab before I glued it shut, seems to help a bit compared to my other SW. Not in the warping issues some have (luckily I don't) but in the whole, "my tail wobbles on hard landings issue".

Originally Posted by XDreamer

My first Skywalker is almost complete...or so I thought.

I was really careful when gluing the two fuselage halves together, but the tail looks twisted. The vertical stabilizer is perpendicular to the horizontal stabilizer, but the horizontal stabilizer does not line up with the wing. I have seen several Skywalkers on the web with the same problem. I should have been more careful when joining the halves!

Is it possible to do something about it?

If the vertical is truely perpendicular to the horizontal like you say, (mine had to be adjusted) I'd just shim the wing to ensure it's parralel with the horizontal stabiliser. You could either add tape under one side of the saddle, or lightly sand the high side.

Sub

Originally Posted by Dimitris76

what happens when you roll the plane on the other side? Does the horizontal stabilizer tilt the other way?

If yes then it's a typical rigidity problem - Skywalker style!

There are many proposed solutions to this, depending on how much time and effort do you feel like investing to correct it.

First of all, did you properly glue the carbon tube in the tail boom's channel? If not the you should - It's never too late. Just make some small holes in the EPO foam every inch or so and inject CA with a needle. Stick with the needle if you want.

Then you can use internal (more or external carbon fiber scafolding to further increase rigidity. The easiest way is to glue 3-5mm rods diagonally between the tail boom and horizontal stabilizer's lower surface - close to the tips.
Of course you'll have to push both rod's ends a few mm into the foam.

Good luck with your maiden!

/Dimitrios

This plane is subject to Tail flutter more than most.
http://www.wired.com/autopia/2010/03...ting-aircraft/
Increasing rigidity will help. I have found that a speedy decent with the prop off will make a gopro jello effect very prominent. At some certain speed depending on how rigid your structure is it will oscillate.

Is the V4 still available and in-stock somewhere. I don't really like the single spar and it doesn't work with the modifications I've done.

Or, maybe someone has a SW V4 in parts (or built) or crashed and willing to part with it?

Oh maaan!

Same here... I need another Skywalker with the older version's double spar wing.

Please, let me know too (PM) if you find a store with new-old stock!

/Dimitrios

During the holiday I was flying in Bardejov, small old city in Slovakia. It was quite windy, so sorry for shaky picture...

FPV Bardejov (2 min 39 sec)

Here is the picture of my Skywalker when I was landing. I'm very satisfied with the front position of GoPro - no airplane nose in the picture and almost no GoPro in the picture of FPV camera...