localbuyer

My Feedback: (6)

Hi All:

I am building my first profile - Pen Knife - and I made the wing slot too big ( I shouldn't have used that Dremel). How to attach the wing not and what glue to use to fill the space?


Thanks

wgeffon

My Feedback: (4)

Fill the slot with 1/16 balsa until the wing is tight again..

Billy Hell

My Feedback: (2)

Also for the nook and crannies just put some Arm and Hamer baking soda, smooth it out and hit it with CA. I will bond your balsa sticks together and make it rock solid. It will withstand a good crash. I do it on all my wings now for security.

BotleRocketWar

I would not trust CA for that joint...It will give in a crash though, which is a good thing.

Try some Epoxy and microballoons to fill the space AND glue the wing in. Good stuff...

JNohsey

My Feedback: (28)

Go with the ca and baking soda. I use this on all my profiles where the wing jo9int doesn't fit. Haven't had any problems with faliure.

CaMike

Propnut and Billy, can you please give a bit more detail on this baking soda and CA "filler" that you are suggesting? Sounds interesting and if it works, I'm all for trying something new!!

Thanks!

Mike

Billy Hell

My Feedback: (2)

It's very simple. Say my wing is in the slot but there are big gaps. Just pour the baking soda in the gap, smooth it out with your finger (once you hit with CA you want be able to sand it), then just hit it drops of CA. I'd wager it's 5 times stronger than epoxy. Easy and insanely strong.

CaMike

Sweet...sounds easy enough even for me to do!! Thanks...I'm hoping I'll be careful enough with my building that I won't have to use this but I have this sneaking feeling that I'll be using soda. I probably don't want to know how this got started but it sounds easy enough. Thanks again!

Mike

John Wells

My Feedback: (10)

Baking soda, thin C/A, and thin balsa is the ticket. It took me just a few minutes to get my Topcap saddle filled in. It's plenty strong. Botlerocket war, finish that profile!

edberry22

I assume you would tape the right side (or left depending on how the fuselage is setting)so the baking soda will stay where its poured? I may need to try this and want to make sure I do it right.
Also, will monocoat stick to this mixture?

Steve in Dallas

I've been flying my Pen Knife for a month or so now. Had the same gaposis problem around parts of the wing saddle. Filled it with NHP Microfill, smoothed it out, then hit it with the thin CA. So far so good.

theKAT

My Feedback: (1)

I've used polyurethane glue on the past few profiles I have built. If the gaps aren't too huge (1/16"-1/8"), it will foam up and fill them in.

Spray a bit of water in the area to be glued. Squeeze in some of the Poly glue (eg ProBond) and wait for the action to start. The only problem with this method is that it takes a good 24 hours for a full cure, and you need to be around for the first 5 or 6 hours to wipe off anything that oozes out with acetone or mineral spirits. But, the resulting bond is virtually indestructible. The wood will fail before the glue. (don't ask how I know)

Might experiment with the CA/baking soda thing. Sounds promising.

Hacker

C.A. and baking soda works fine...been using it for years...no problems....covering sticks ok but not great...

WADE

My Feedback: (19)

I've heard of the baking soda and ca combo before, but this thread prompted me to do an experiment. I found it to be very hard, but very brittle. It should work fine as a gap filler and it would provide some bonding strength, but I wouldn't want to rely on that joint for any significant strength.

edberry22

Are there any reliable, tight contact points when the wing is in place? I think I'd more concerned about the incedence getting messed up if there aren't. If there are, then I might get it in place, and tack glue it where it needs to be, then proceed with filling the gaps. I had a few on my OMP and the baking soda thing worked like a dream.
Just my 2 cents here of coarse.

Billy Hell

My Feedback: (2)

Brittle it ain't. I literally had to use a dremel tool to get one piece seperated from another.

WADE

My Feedback: (19)

Brittle it is! I could snap a piece of it easily. And I was using the good stuff, Arm and Hammer and Pacer ca. It probably won't seem brittle if it's stuck inside of a gap. For what you guys are using it for it will probably work great. The epoxy and microballoons would work great just like the one guy mentioned. I figure the same goes for the Probond, it seems like some great stuff.