Author Topic: Dreadnought with improvised wing joints (Read 1391 times)

Derek Barry · « **Reply #1 on:** February 19, 2013, 06:59:32 AM »

Very Very Nice!!!

Derek

Dennis Toth · « **Reply #2 on:** February 19, 2013, 07:31:22 AM »

Jorge,
Looks great!!! Are the graphics on the fuse paint or vinyl? If vinyl who cut them and how did you apply and what did you clear over them with?

Again ship look Awesome.

Best, DennisT

Avaiojet · « **Reply #3 on:** February 19, 2013, 07:39:43 AM »

Nice sysyem.

Great looking model also.

Question.

R/C guys use a single tube for attaching wings. I've had a few models like this and still have a few.

We snap roll these models and some are large. They stay together. My old Staudacher was 80.5" in span. Not large but not small either.

Tube, small screw for each wing and a couple of dowel pins.

Why won't this attachment method work for CL?

Charles

Derek Barry · « **Reply #4 on:** February 19, 2013, 07:43:55 AM »

Quote from: Avaiojet on February 19, 2013, 07:39:43 AM

Nice sysyem.

Great looking model also.

Question.

R/C guys use a single tube for attaching wings. I've had a few models like this and still have a few.

We snap roll these models and some are large. They stay together. My old Staudacher was 80.5" in span. Not large but not small either.

Tube, small screw for each wing and a couple of dowel pins.

Why won't this attachment method work for CL?

Charles

Because thatis where the bellcrank and leadouts go...

Derek

Avaiojet · « **Reply #5 on:** February 19, 2013, 07:55:37 AM »

Quote from: Derek Barry on February 19, 2013, 07:43:55 AM

Because thatis where the bellcrank and leadouts go...

Derek

Derek,

I don't understand the leadouts being an issue? The bellcrank can be placed anywhere. So they say.

Has anyone made attempts to use the simple tube method?

And failed.

Charles

Derek Barry · « **Reply #6 on:** February 19, 2013, 08:35:51 AM »

Quote from: Avaiojet on February 19, 2013, 07:55:37 AM

Derek,

I don't understand the leadouts being an issue? The bellcrank can be placed anywhere. So they say.

Has anyone made attempts to use the simple tube method?

And failed.

Charles

Yep, just put the bellcrank anywhere, doesn't matter.

Derek

Avaiojet · « **Reply #7 on:** February 19, 2013, 08:55:33 AM »

Quote from: Derek Barry on February 19, 2013, 08:35:51 AM

Yep, just put the bellcrank anywhere, doesn't matter.

Derek

derek,

OK, then why isn't there a wing attachment method, using a simple tube, like in R/C?

Charles

RC Storick · « **Reply #8 on:** February 19, 2013, 09:08:19 AM »

Quote from: Derek Barry on February 19, 2013, 08:35:51 AM

Yep, just put the bellcrank anywhere, doesn't matter.

Derek

Randy Powell · « **Reply #9 on:** February 19, 2013, 09:46:30 AM »

Ah, you can put the bellcrank anywhere. but you also have to think about the drag on the leadout mechinism. If the bellcrank is at too severe an angle to the leadout position, you will have a plane that hunts (among other problems). I suppose you could build a system that has some sort of roller at the leadout position that would allow for a severe angle, but seems a lot of work unless you are overcoming a specific problem.

Since there are all sorts of systems for plug in wings, why re-invent the wheel?

Oh, an the system presented here is interesting. I imagine it will work fine if the anchors in the fuse are secure.

RC Storick · « **Reply #10 on:** February 19, 2013, 10:08:53 AM »

Quote from: Randy Powell on February 19, 2013, 09:46:30 AM

Oh, an the system presented here is interesting. I imagine it will work fine if the anchors in the fuse are secure.

Side note. I can't remember what year it was but I was almost hit by a engine that flew out of a plane. That's the same year of the big winds and I caught a P51 as it almost hit me in the face when the wind picked it up the reason I mention this is that both guys were from Brazil. Quite a fun bunch. Same year the wing separated from the fuse on one plane.

The airplane here looks like it will be secure however my mind did question the center spar and joint. Only time will tell.

MarcusCordeiro · « **Reply #11 on:** February 19, 2013, 12:49:45 PM »

Quote from: Robert Storick on February 19, 2013, 10:08:53 AM

Side note. I can't remember what year it was but I was almost hit by a engine that flew out of a plane. That's the same year of the big winds and I caught a P51 as it almost hit me in the face when the wind picked it up the reason I mention this is that both guys were from Brazil. Quite a fun bunch. Same year the wing separated from the fuse on one plane.

The airplane here looks like it will be secure however my mind did question the center spar and joint. Only time will tell.

Remember the names of the guys?
When and where?
Would like to know this....

Marcus

Will Hinton · « **Reply #12 on:** February 19, 2013, 02:28:07 PM »

Aaah yes, Robert - the year of the big wind! Wow, what a zoo that was on finals day!

And yes, the Brazilian contingent added so much to that fun. I hope they come back soon!

Meanwhile, the workmanship on this plane is really fine! Way to go.

Randy Powell · « **Reply #13 on:** February 19, 2013, 03:11:22 PM »

Robert,

I agree. Seems the aluminum tubes could take the torque of the wing. The bolted areas are usually just supposed to insure the wing doesn't move on the supports, not take any of the flight stresses. I wasn't all that thrilled with the setup, but as you said, time will tell. Could be he's used this method numerous time without problems, but it's not a system I would be happy with.

MarcusCordeiro · « **Reply #14 on:** February 19, 2013, 03:49:29 PM »

Check here

http://vcconline.go-forum.net/t1038-wing-joint-improvisado

There're more pics

Marcus

ash · « **Reply #15 on:** February 19, 2013, 04:42:29 PM »

Quote from: Randy Powell on February 19, 2013, 03:11:22 PM

Robert,

I agree. Seems the aluminum tubes could take the torque of the wing. The bolted areas are usually just supposed to insure the wing doesn't move on the supports, not take any of the flight stresses. I wasn't all that thrilled with the setup, but as you said, time will tell. Could be he's used this method numerous time without problems, but it's not a system I would be happy with.

Further agreed.

I would suggest looking very carefully for cracks around those screw tabs before and after every flight.

Lauri Malila · « **Reply #16 on:** February 20, 2013, 03:01:02 AM »

[quote author=Avaiojet ..

Question.

R/C guys use a single tube for attaching wings. I've had a few models like this and still have a few.

We snap roll these models and some are large. They stay together. My old Staudacher was 80.5" in span. Not large but..

[/quote]

Of course there is the issue with control system, but also structurally, a single thick tube is never ideal. It's used in RC models only because it's easy to make.
The problem with a tube is that there is the smallest amount of material where you need it the most (in top & bottom to handle the tension and compression), and unnecessarily much material the closer you get to the center line.
It's kind of a mirror image of a good I-beam. But it seems to work with RC people, they are not so anal about weight and intelligent use of construction materials. L

Ps. I must add that in my free flight gliders, the wing joiners are 2x 1/4" dia. solid spring steel bars and they bend far too easily. Now we're looking for a replacement in carbon, perhaps with a square section.

Jorge de Azevedo · « **Reply #17 on:** February 20, 2013, 03:59:50 AM »

Quote from: Dennis Toth on February 19, 2013, 07:31:22 AM

Jorge,
Looks great!!! Are the graphics on the fuse paint or vinyl? If vinyl who cut them and how did you apply and what did you clear over them with?

Again ship look Awesome.

Best, DennisT

Dennis,
Thank you,
It is all painting. I utilized vinyl as a mask to paint this, it was cut in a plotter.I have photos step by step form this painting including wings not shown here.
The colors was polyester paint with clear PU PPG over.

Jorge de Azevedo · « **Reply #18 on:** February 20, 2013, 04:26:50 AM »

Quote from: Derek Barry on February 19, 2013, 06:59:32 AM

Very Very Nice!!!

Derek

Thank you, Derek.
I love all your paintings.

Jorge de Azevedo · « **Reply #19 on:** February 20, 2013, 04:37:15 AM »

Quote from: Robert Storick on February 19, 2013, 10:08:53 AM

Side note. I can't remember what year it was but I was almost hit by a engine that flew out of a plane. That's the same year of the big winds and I caught a P51 as it almost hit me in the face when the wind picked it up the reason I mention this is that both guys were from Brazil. Quite a fun bunch. Same year the wing separated from the fuse on one plane.

The airplane here looks like it will be secure however my mind did question the center spar and joint. Only time will tell.

Robert,
I remember this, the guys were using American wing joints.

RC Storick · « **Reply #20 on:** February 20, 2013, 09:23:32 PM »

Quote from: Jorge de Azevedo on February 20, 2013, 04:37:15 AM

Robert,
I remember this, the guys were using American wing joints.

When i caught that airplane its was straight vertical and I caught it with no damage. What luck for both of us. Me for not getting hit in the face and him for still having a airplane in tact. I wish I would have been closer to Bobs crossfire that one year a dust devil flipped it over.But I was at least 10 foot up wind.