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SuDoKhoi 60 Repair

Old 01-06-2003, 07:36 PM
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Default SuDoKhoi 60 Repair

Actually mine came with gear for a Balsanova 120. Deb is mailing me the correct gear. I looked around for a composite gear and found ZILCH! If you drill, please get a pic, so that I can copy your idea. I'd like to see a 7.5 pound bird here. I'm kinda thinking it will be a rock solid 8 though. I looked for spots to Dremel out, and figure I'd get no more than an ounce or two, and none from the nose anyway, so she's going to be stock. Bt the way, did anyone notice that the Morris site is way off on the wing area? The site says (and has for a while) 1300 squares. The plans say 1035.5. I e-mailed, and the plans are correct. It bugs me a bit, but I'll get over it.
Old 01-06-2003, 07:43 PM
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Default SuDoKhoi 60 Repair

Hmm... that does suck a little.... the give a wing load of about 16 - 17 oz per sq ft.... I wanted to see closer to 13.... oh well... Maybe I should increase the wing area a little....

The site says the wing span is 60".. Which gives a MAC of 17.25.

You'd have to go to a 75" wing span to get the 1300 sqs and 13 oz wing load... That's a lot..

If I increased the wing span to 70", that's only 5" on each side and only about 1" per bay.... Might be doable....
Old 01-06-2003, 07:49 PM
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Default SuDoKhoi 60 Repair

8 pounds equals 17.8 ounces per foot. You need 1420 squares to get 13 ounces per foot at 8 pounds. Or 5.85 pounds at 1035.5 squares. Either would be quite a trick.
Old 01-06-2003, 07:53 PM
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Default SuDoKhoi 60 Repair

TailTwister, can I get you to give me a measurement from the plans? I need to know how much the wing sweeps back from the root rib to the tip rib....

Thanks a bunch...

I ended up just redrawing this wing in AutoCad... I even redid the ribs... I was going to have them lazer cut, but just decided to buy a wing kit from morris.... I found out later I could have got a wing tube and socket from TnT... That might have been the hot setup.... Maybe next time.
Old 01-06-2003, 08:00 PM
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Default SuDoKhoi 60 Repair

Measuring with the root leading edge as zero I get a sweep of 1 & 7/8 of an inch to the point where the ribs (leading edge) end and the rounded tip begins.
Old 01-06-2003, 08:15 PM
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Default SuDoKhoi 60 Repair

Thanks for that measurement!!! My drawing is off about 1/8" from my measurements I got off the wing that came with the basket case plane...

What do you think about the Wing enlargment idea? Also on the building instructions, do they have you lay the sheeting down first then the spars and ribs after?
Old 01-06-2003, 08:22 PM
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Default SuDoKhoi 60 Repair

You could add 1/2" to the aileron's and increase the span to 68".. that's only 4" on each side or about .80" per bay...

Or....

Add 3/4" to the aileron's and make the span 67".... for an additional .7 per bay....

You know... maybe I'm thinking about this waaaayyy too much....
Old 01-06-2003, 08:27 PM
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Default SuDoKhoi 60 Repair

First off, sorry Dude, the wing is only 56 inches and change. It is not 60 inches. Yet another discrepancy on the website. Morris has the manual online for download. That will give you the building steps. It starts with making the sheeting, then place (not glue) the spars and stringers on the sheeting. Pin down the trailing edge and put the tubes into the ribs at the root. Then put down the ribs. Make sure that the ply donuts are in place. Install top spars and stringers. Anyway, download the manual, but don't expect too much, the manual isn't what it could be.
Old 01-06-2003, 08:34 PM
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Default SuDoKhoi 60 Repair

Thanks for the tip on the manual... I've heard it sucks... but I'll give it a shot....

Anyway.. with the new wing measurements..

You could add 1/2" to the aileron's and give it a span of 63.5" to give you 1207 sq's. All you's have to do is add .75" to each bay.
Old 01-06-2003, 08:37 PM
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Default SuDoKhoi 60 Repair

Good luck! You may be better off finding a Profile Brother with a foam cutter and sent him a root and tip rib. Just decide the wing panel length and you're done. What the heck, go for the 65 incher.
Old 01-06-2003, 08:39 PM
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Default SuDoKhoi 60 Repair

I can use the stock ribs and still do the increase in wing span.... I just dont' want a flying barge.....
Old 01-06-2003, 08:53 PM
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Default SuDoKhoi 60 Repair

If you add 9 to 10 inches of span by adding only sheeting, spars, and stringers, you won't add hardly any weight. After that, just be cautious with covering and glue. As far as being a barge, remember, there is more to flight than a wing load. Larger planes often seem to fly a bit lighter. Most T.O.C. planes have a wing load in the mid 30's. Think about it this way. An air molecule's size is generally consistent. There will always be a certain number of air molecules under your wing (at a given altitude or pressure) to help hold it up. More wing area (big planes) equals more molecules under there with no regard to weight. In a lot of 3D the wing of a plane is acting more like a boat hull than a plane wing. That's how we seem to "fly" below stall speed. Don't sweat the wing load. Wayne's plane flies pretty good, right? I'll bet he doesn't have any additional wing and his plane weight about 8 pounds. It will be fine as it is, but if you want to go all out, I'll be the first one to say go for it!
Old 01-06-2003, 09:05 PM
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Default SuDoKhoi 60 Repair

Yeah mines near 8lbs and its good there.

Paul,

I just looked at mine to find where the plans call for the CG to be. The center of the CG range is 3-3/8" in front of the canopy.

Thats the center of the range. I am flying a little behind that.
Old 01-06-2003, 11:32 PM
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Default SuDoKhoi 60 Repair

Okay guys... now for a dose of reality... I just measured my SuDoKhoi with the old junk wings.... The wing span measures 53"!! Even less than everything else...

The wings measure just a tad over 25 1/2 " each and the fuse is 2" wide.

Does this check out with everyone else or did the builder screw that up too?!!??
Old 01-06-2003, 11:37 PM
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Default SuDoKhoi 60 Repair

25.5 is right.
Old 01-07-2003, 12:24 AM
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Default SuDoKhoi 60 Repair

That would be a snappy name - " Sudobarge"
Old 01-07-2003, 03:10 PM
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Default SuDoKhoi 60 Repair

Measuring the wing from the root to the last rib on mine is 25.5 To the tip measures 26.75. With a 2 inch fuselage I have 55.5 total span. Measuring the wings from root to tip rib, and calculating the area there (including ailerons) I get 956.25. Adding the fuselage area between the wings I get 1000.25. Estimating the tip area I get about 1012.25. At 8 pounds the calculated wing load is 18.21 ounces per foot.

Hmmmmmm........
Old 01-07-2003, 03:13 PM
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Default SuDoKhoi 60 Repair

Just finish it and fly it!!!! LOL
Old 01-07-2003, 03:30 PM
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Default SuDoKhoi 60 Repair

I got my wing kit last night... Ran out to home depot and snags a big chunk of dry wall to build on... Started framing it up last night.... Some of the wood was excelent quality... and some of it is crap..... The root ribs were both pretty warped... I'm also not to thrilled with the die cut parts.... None... and I mean NONE of the sub rib slots were cut right.. Most of them allowed for a lot of movement...

I'm started to wish I had just lazer cut my own... Oh well...
Old 01-07-2003, 03:31 PM
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Default SuDoKhoi 60 Repair

I'm working on it! I'm working on it! OK, no more math! Where the heck is that epoxy? Anyway, I got the motor mount and tank thing handled. I put a plate on the backside of the motor area to clean up the look. Today I'll finish up the wing mount details, and I'll try to get the hardwood in the gear block. Who ever heard of a balsa landing gear block? After that I guess I'm waiting on covering...

Wayne- For your wing mounting tabs, did you install a blind nut or just use the red tubing? It doesn't look like a stress area, so I was thinking a 4-40 screw, washer (plus lock washer) and blind nut.
Old 01-07-2003, 03:34 PM
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Default SuDoKhoi 60 Repair

I used the red ny-rod inside the fuse.
Long bolt with a nylon insert nut to hold it secure..

Works fine.
Old 01-07-2003, 03:50 PM
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Default SuDoKhoi 60 Repair

TailTwister - I was thinking of going the blind nut route myself.... I have to redril the hole 'cause the guy who built this thing mounted the wings upside down....

So the jury is still out on the blind nut deal.
Old 01-07-2003, 03:54 PM
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Default SuDoKhoi 60 Repair

The blind nut would go in the hole in the wing tab itself. The tube inside the fuse is just a guide to get it through the fuselage. I like the nylock nut due to vibration concerns. I doubt the wing would come off, if the dowel is screwed properly, but a loose wing is worrysome.
Old 01-07-2003, 04:02 PM
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Default SuDoKhoi 60 Repair

Yeah. Its really just there to hold the rear portion of the wing tight against the fuse..
Old 01-07-2003, 04:23 PM
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Default SuDoKhoi 60 Repair

Originally posted by PaulSwany
I have to redril the hole 'cause the guy who built this thing mounted the wings upside down....

Wow !!! Who was that builder ? I hope I never buy an airplane from this guy !
Paul, I think you would have been better off building you a new one from a kit

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