RE: Another Skymaster Viper
 

Hey Otto,

what's that funky PCB in pic #3 ?

Nice installation! I'm almost finished - fitted all connectors to the wings and fuse yesterday (air, lights and servos) and finished my new wing attachment (glued a piece of M5 wire in the wing, now the wing fixes to the fuse with a nut)

Waiting for the weather to get better..

Hans

RE: Another Skymaster Viper
 

Nice isn't it? :) It's a full programmable (from PC) circuit for the lights.
Look here

http://translate.google.it/translate...chede%2520luci


I took this one as, at this time, I only use Sandor landing lights

http://translate.googleusercontent.c...7_V4G7nDPhMDYQ

Please, post some pictures, I don't like the way wings are attached to the fuz...

Tks!
8

RE: Another Skymaster Viper
 

Otto,

you might just have saved me some soldering/programming time of my own ;)

I'll post some pics tonight, but in short:

- I drilled a hole right next to the wing-tube in the wing (in between the wing-tube and the spar/former that makes the gear-box)
- one one wing, there was material behind, on the other almost none, so I glued two dowels in place
- drilled a hole in the fuse-sides, next to the wingtube, through the ply reinforcement (
- glued M5 wire ends in the wings/dowels with epoxy
I now can pull the wing to the fuse with one single nut, access through the wheel-wells. I might drill a hole in the M5 thread for some security wire, or just slip some fuel-line over it after tightening the nut so it can never loosen itself

Advandages:
- attachment in the center of the wing, near the wing-tube, so in a minimal flex-area (neutral line). Won't work itself loose
- wing is pulled against the fuse, no gaps

Pics will follow :)

RE: Another Skymaster Viper
 

What's wrong with the wing fixing as it comes? i've not heard of any not being hysol'd for about a year

Duncan

RE: Another Skymaster Viper
 

why do it easy? when it can be so difficult?:D

RE: Another Skymaster Viper
 

Don't like a wing-fixing out of center.

Plus, I had to do one on my new right wing myself, this was easier ;)

What's hard about drilling two holes and glueing in a threaded rod-end? Easier than replacing the gear :p

RE: Another Skymaster Viper
 

no drilling or gleuing needed to fit our gear[>:]

RE: Another Skymaster Viper
 

lol no worries, just curious.

My wing is that stiff to get on and off, that i doubt the fixing would make a difference anyway lol

RE: Another Skymaster Viper
 

I know what you mean, there is exactly one posision in which the tube fits in my right wing ;)

The main reason I choose for the alternate fixing, is that I use those airpower air-couplings, and I'd hate to loose air because of a loose fit wing. Now everything is tightly pulled together. I'm sure the other ways work well as well, but peace of mind gets more important the bigger (and more $$) the jets get ;)

Hans

RE: Another Skymaster Viper
 

Hi Duncan,
perhaps it's in most cases a "no problem" (in italian we say a "non problema":), not sure you use it in english) but we all know about the lacking of glue in many parts of our vipers.
When I thanks you all about all the help you have done to me, this is because I've read all the 38 pages of these thread [&:]:D, therefore...


About this problem look here
http://www.rcuniverse.com/forum/fb.asp?m=8743967


and here (text and picture 6)
http://www.rcuniverse.com/forum/fb.asp?m=9062463


Ciao
Alessandro

RE: Another Skymaster Viper
 

At the first time I used an LM350 (better then LM317), two resistors (to reach 350mA), one microswitch and one microservo.... then I took the circuit that would be useful also if I will use some more lights (red, green, strobo etc.).
Reversing Sandor: why do it difficult? when it can be so easy? :D

Thanks for the explanations, waiting for pics!

A

RE: Another Skymaster Viper
 

Here's some pics:

Wing, with connectors and glued-in piece of M5 stainless wire:

http://sandbox.flexlogic.nl/mbpics/v...wing-cons2.JPG

Different angle:
http://sandbox.flexlogic.nl/mbpics/v..._wing-cons.JPG

If I could have gotten my drill inside the fuse, the holes and dowel would have lined up better. :rolleyes:

Hole and location in fuse. It goes through the ply doubler that is in place.
http://sandbox.flexlogic.nl/mbpics/v...ld/qq_hole.JPG

All comes together:
http://sandbox.flexlogic.nl/mbpics/v...q_together.JPG

On the inside (forgot to take the picture), simply a washer and a nut, and the wing neatly gets pulled against the fuse.

Simple mod, makes me feel good :D

Hans

RE: Another Skymaster Viper
 

I did the same with my hawk wing attachment. I use a simple wing nut to attach through the wheel well and really like the way this works.
Regards Al

RE: Another Skymaster Viper
 

Forgot to mention, if you use enough glue, the wire is glued to both the main spar, and the wing-tube, so it has a place to pull on.

Maybe in the future, skymaster will pre-drill the holes for us ;)

Hans

RE: Another Skymaster Viper
 

Maybe i can make that also on my Viper, i was also thinking to make it the same way and Sandor told me also the same.
I had almost the same on my/Ali's L-39, i glued the nut into the wing and then easely open the geardoors and put the screw in.
I will see,i can think about this all the next week and and then make the change when we are back from Floridajets.

Regards Ron

RE: Another Skymaster Viper
 

Hans,

Very nice modification to secure the wing! are you still planning to use the original secure method in conjunction?


Gonzalo

RE: Another Skymaster Viper
 

Hi Gonzalo,

on one side perhaps, but on the other (right) side the original mount is not in the wing, so I think I'll only use the washer and a piece of tubing for security.

Hans

RE: Another Skymaster Viper
 

Hans,
just perfect and very simple. And is also "Ali certified" !!!:)
I'm going to do it this night...

Thanks
Alessandro

RE: Another Skymaster Viper
 

Yep it makes sense to do it, cheers all

RE: Another Skymaster Viper
 

Wings attached to the fuse, sequencer programmed:

[youtube]http://www.youtube.com/watch?v=EunRm5ac1Q4[/youtube]

Not exactly scale, but I like the mains closing :P

Hans

RE: Another Skymaster Viper
 

Hans,

Nice mod.

Did a similar mod on one of my warbirds, 3W F8F Bearcat, but in that case used a 5/16-18 (about 8mm) nylon bolt ... with the head on the "outside" of the root rib, threaded end stuck out and went thru the fuse side, and secured with a nylon wing nut inside the fuse.

Advantage of nylon was: 1) does not loosen up during flight (admittedly a big problem on gassers, less so on jets) and 2) could shear off in a cosmically hard landing (don't ask me how I know this actually works...) so that more extensive damage is not done as the wing rotates around the tube.

Dave

RE: Another Skymaster Viper
 

very nice :D

RE: Another Skymaster Viper
 

I would speed up that retraction and extension time, you might just find yourself needing to get the feet in or our quickly and you are going to be hosed.....

RE: Another Skymaster Viper
 

Dave,

still some tweaking to do ;)

I was glad I finally figured out the airpower sequencer logic :rolleyes:

Hans

RE: Another Skymaster Viper
 

I am hearing that there may be a batch of wing tubes that are not made to the correct specs. If your wing tube weighs less than 220grams, tell Skymaster & they will send you a new one.