LBJ

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Hi Ron. OK, modified the ad to settle all concerns. I have the ad already on RCU, so this is just a pointer to that ad. If it gets taken down, then that's OK. Just a heads up to those who might be interested on this thread.

captainron

Roger on that LBJ............What a beautiful Corsair. I have the ESM also...But it don't look nuttin like yours...............LOL.....Bone stock except I reengineered The whole inside to fit my idea of what and how it all should work in there. TOO bad you have to let it go............lot of work there.

Cheers Captain Ron

Peter_OZ

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kwik

That is terrible!!! Good grief.

I am thinking of cutting away all the sheeting of the top of the center section, strengthen it up, and sheet it again.

Its quite some work, though.

And one gets a problem with the height difference between center and outer wingpanels.

I reckon one will have to shave off a mm or two from the top of all the spars...and the area in the bend up front over the leg will be a real pain....

I have been thinking of filling the front of the wing with building foam instead.....but unsure of how wise it would be.

cosmo21

Bugger,
Mine is ready to go. But I don't want to lose such an expensive plane, cuz of sh&&t engineering.

I was thinking of the expandable foam option as well.

Matt

kwik

If the plane is brand new, there shoudnt be a problem?

I had 75 flights with the the first one before the wing ripped apart.

It had been weakened by some VERY hard "landings". It is easy to get a hard landing when you try to get used to those big flaps on a short airfield.

Not to mention a deadstick out in the fields......Started to cracking up in the leading edge.....

This is my new one....but I already had a hard landing with it......arggggh.

Peter_OZ

My Feedback: (1)

open top of the centre of wing. Splice heavier spar in place, epoxy carbon fibre to it along its length. Put the wing skin back on and put a layer of 2 oz cloth over the opened section. Sand back smooth. Thickness would be less then 0.25mm

not overy difficult to do and will save your model from turning into a 40lb missile!!

esacco

My Feedback: (30)

Mine failed the exact same way...... wing is just Very weak. I got the topflite and it is MUCH stronger with an alloy spar. ESM is just a nightmare here... same with the Stuka.

Peter_OZ

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the ESM tigercat has same issue. They cut so much out of the ribs they just pull away under load.


You can probably make a reasonable model out of it but there are a lot of structural mods to be done. Piss poor design work.

LBJ

My Feedback: (49)

I have the 74 inch ESM Corsair and have flown it quite a bit under all kinds of conditions. Still holding together.

I wonder if some hard landings have come into play with the failures and also wonder if the ones coming apart have the outer panels glued on or not. I haven't flown my 85" corsair much yet. But like Kwik says, he's flown his old one 75 times to success. Guess I'll be quite aware of what happened before it hits the dirt, if mine comes apart inflight. ha

Peter_OZ

My Feedback: (1)

or open it up Lou and have a squiz

its a simple fix!

kwik

Peter, which part of the skin are we talking about? To cut away, I mean ? Is it this part, or is it more;

kwik

And which spar are we talking about? The one that isnt there, up front, or the main spar?

cosmo21

Arrrrrrrrrggghhhhhhhh! Thought mine was now ready to fly.
Wont be flying it until I take the top or bottom skins of and engineer it properly. This f*&(&in annoys me.

I mean I do my job properly, why cant other people?
Would it be easier to open the bottom of wing up I wonder. We'll see.
I guess I got some work to do.

I'll get some pics when I open her up.

midastouch_73

My Feedback: (27)

Take a really good look inside there. When I opened mine I notice there was no glue holding the skin to the spars causing it to warp the outer skin. I used Kevlar Carbon fiber and epoxy to cover the inner part of the wings top and bottom. It's solid as steel now and the outer skin doesn't have the ability to flex or warp because it's stuck to the Kevlar. I also used spray in foam to strengthen the area so is solid instead of hollow. I posted pics on this forum of my repair. Instead of cutting the wing open I accessed that area via the radiator covers. You can sand around them and the will come off rather easy. You can reglue them then paint around them when your done. Refer to post 1826 on page 74

vasek

My Feedback: (4)

That's because you're not a Chinese communist! lol

LBJ

My Feedback: (49)

I've read thru the latest comments about failures several times and still not sure what is failing. Is it the spar or the glass covering?

splatoman

Hi I am the one that Peter was talking about. First the plane fly's very well and with the FG84 sounds so good. I spent about 12 months building the aircraft up and doing all of the scale bits on it I could not see any of the problems with the centre section. On the first test flight all was well came in did some adjustments and went up again that's when it happened. On inspection of the centre section we found that the fiberglass was a very dry lay up and that a lot of the ribs were not glued to the skin. The spare was not up to the job at all it would have been at home on a 40" model not on a 85" one. After this and m ESM Tigercat I don't think that I will buy any more.

CafeenMan

It went down on the second flight? So sorry man. I've lost a lot of planes but nothing with that kind of money in it. But some with tons of time. I know what that feels like. I wish people didn't make things if they didn't care enough to do it right.

CafeenMan

Some people only care about the money. Look around you at work. If you owned your own business, what percentage of the people you work with would you take with you knowing you would get value for what you paid them?

CafeenMan

From the photos it looks like everything. The skin is delaminating, the spars are failing, the ribs are coming apart. Normally ribs don't have to do much but shape things, but the spars are probably buckling which helps the skins come loose but the spars and skins together are probably causing catastrophic failure.

Anderson Pereira

Perfect to Evolution 7- 77 radial engine!!!

cosmo21

That is true.

cosmo21

Well, I took the bottom wing skin off fwd of the spar. It come off VERY easy.... Horrifiefing what I found. For starters the glue is very soft, it is not bonded properly, there were several 5mm gaps of fresh air!. The spar is no where near adequate ect ect. I thought I got some pics, but it seems my iphone is playing up. Grrrr.

My fix so far has to be< I made some spar doublers out of 6mm aircraft ply and fitted with Hysol glue, filled the gaps ect, I mixed up a slurry of carbon fibre rovings and polyester resin and created fillets on all the joins between skin and rib, Ive also laid down carbon fibre cloth on all those flexible areas. I will wait till everything is cured. Then I will make another spar out the 6mm ply and place fwd of the main spar. Then I will place doublers on all the ribs in the area. I will then replace top skin using Hysol. After its cured I will fill the voids with expanding foam.
May sound like I'm over engineering, but it's required.

I also have the FG 84 Saito, I don't want to wreck such a beauty.
I reccomed everyone who has this plane to do some investigating.

It is a time bomb tick tick tick.

Matt

splatoman

Hi, I though I would put some more photos of the wing up.

And this was the FG84 at the front.