_brad_

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Hi all,

My first kit build was a Greatplanes PT-40. When contructing the wing, the instructions said to pin the main wing spar to the plans and then build the remainder of the wing around the spar. Everything worked out great and the plane is still flying.

I am in the process of building my next plane which is a Goldberg Tiger 60. Wing constructions says to pin the main spar using a scissor method which criss crosses the pins across the main spar.

What is the difference between pinning directly through the spar onto the plans, or using the scissor pin method? Is one better than the other? Could I pin directly through the spar again like I did with the PT-40?

Any advice is appreciated.

Have a great day,
Brad

GaryHarris

Pinning through the spar can cause it to crack. I allways use the scissor method just to be safe.

Lnewqban

If the wood of the supplied spar is of hard type, the pin thru is harder to do and it may split the wood.

I prefer the scissor method over pin thru, everywhere and for any wood type; but I don't have a particular reason.

Go magnetic!!

http://www.airfieldmodels.com/inform...oard/index.htm

MinnFlyer

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I like to use these straps that are made for holding household wire in place

_brad_

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Thanks for all the tips.

MinnFlyer , what a great idea.  I would not have thought of that.  I think I will try it out.

Kaos Rulz

Doesn't it smash the wood when you hammer the nails in?

MinnFlyer

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Not if you don't use a sledgehammer

Just tap them in - You don't even have to go all the way in as the plastic "bridge" is tight on the nails, so you can just slide it down to the wood once the nails are seated

Kaos Rulz

Excellent tip Mike. Thanks for the share.

Gray Beard

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I pin balsa and cross the hardwood but after seeing my newely invented method I will be making a trip to the hardware store today!!!
Thanks for showing me my newest idea Mike!!!!!! Came just at the right time too, I'm building a wing this week.
Gene

MinnFlyer

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[sm=thumbup.gif]

See what a smart guy you are Gene?

Gray Beard

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Very true and I wasn't even sitting on the can when this one came to me!!!

Charlie P.

Rather than go through a wing spar of cross the pins, Ipush them into the board leaning away from each other and use a rubber-band between them for down pressure.

This also allows me to hold the upper spar down, align everything (Iuse House of Balse squares), and then use CA to glue all the ribs one right after the other in a single operation.

Gray Beard

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Dang, I came up with two original thoughts all in one day!!!!!!!![8D]

_brad_

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Great idea with the rubber bands.

This forum is full of endless ideas.  Now that does not make sense - full of endless - hhhmmm

Charlie P.

You is on a roll! 

Gray Beard

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Some of my days are just smarter then others!!!!!!!! Kidding aside. When I walk through a hardware store I put my mind into airplane building. {After I locate what i went in for} I slink around all the isles and come up with some pretty great stuff but how I missed the wire holders Mike came up with I will never know. Using RBs for holding down the top spar?? I have been building kits sense 1956, I would think something that simple would have hit the brain cells by now. I'm thrilled if I can learn something new every day, you and Mike really made my day.
A big thanks to both of you!!!!!!!!!!!

Lnewqban

That one is a great idea, Charlie![sm=thumbs_up.gif]

Thanks

MinnFlyer

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Gene, you're lucky. Usually I leave the hardware store will all the cool stuff I thought of using for planes and completely forget the stuff I went there for [:@]

Actually, that idea came to be because I had just hung a new flourescent light over the bench and had a few of those clips still sitting on the table when I started the new build (for which I had hung the light).

Voila!

Gray Beard

My Feedback: (-1)

That happens a lot to me too, all the time these days. I tend to write myself a list before I ever leave the house. I was just at the hardware store and when I got home I discovered I had forgot one of the items I needed, now I can't remember what the hell it was to even put on my list!!! Golden years my stinkeyhinderpoo!!![&o]