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Offline Motorman

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« on: January 24, 2014, 02:08:21 PM »
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« Last Edit: September 21, 2021, 06:24:40 PM by Motorman »
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Offline Bill Little

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Re: Wing Tip Weight Box (Banshee)
« Reply #1 on: January 24, 2014, 02:14:42 PM »
I put a "filler" of 1/16th around the edges to give something for the covering to attach to.

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Re: Wing Tip Weight Box (Banshee)
« Reply #2 on: January 24, 2014, 03:00:24 PM »
This is what I'm doing on my akromaster, a cigar tube. I figure I will load most of it with foam and use lead fishing weights. This is my first build bigger than 1/2a and my first weight box so we'll see how it goes.
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Offline 55chevr

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Re: Wing Tip Weight Box (Banshee)
« Reply #3 on: January 24, 2014, 03:11:38 PM »
innovative for sure, but a bit of overkill.   
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Joe Daly

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Re: Wing Tip Weight Box (Banshee)
« Reply #4 on: January 24, 2014, 03:44:00 PM »
The weight of the cigar tube might be too much by itself.
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Offline Tim Wescott

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Re: Wing Tip Weight Box (Banshee)
« Reply #5 on: January 24, 2014, 04:54:18 PM »
Cigar tubes are pretty light, and he'll have wiggle room in case he wants to try 0.062 lines.

Motorman:  I build a box right behind the spar, with a 1/4" balsa lip all the way around.  Then I sand the lip flush with the ribs.  That gives the covering something to stick to.

I make my boxes big enough for washers for 1/4" bolts because they're cheap.
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Offline MarcusCordeiro

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Re: Wing Tip Weight Box (Banshee)
« Reply #6 on: January 24, 2014, 05:10:39 PM »
I do it as Tim, a balsa frame around the weight box for the covering to have where to stick to...

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Offline Avaiojet

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Re: Wing Tip Weight Box (Banshee)
« Reply #7 on: January 24, 2014, 05:31:14 PM »
Here's a typical installation.

Not floating but a sizable amount of wood area for silk to hold.

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Offline Avaiojet

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Re: Wing Tip Weight Box (Banshee)
« Reply #8 on: January 24, 2014, 06:32:46 PM »
Quote from: Motorman on January 24, 2014, 06:21:45 PM
I hope the cap on that cigar tube holds the lead weight in.


MM

What does a cigar weigh?  n~
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Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline Jim Thomerson

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Re: Wing Tip Weight Box (Banshee)
« Reply #9 on: January 24, 2014, 06:34:56 PM »
I have used a small pill bottle set in the plywood tip rib of a Twister.  I have also taken wing mount blocks, tapped 1/4 x 20, and dished them out some inside, then build a ply box around them and the balsa around them for the silk to stick to.  I use steel BBs put in through the bolt hole, then close the hole with a cut off piece of 1/4 x 20 wing mount bolt.
« Last Edit: January 28, 2014, 03:02:35 PM by Jim Thomerson »
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Jim Roselle

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Re: Wing Tip Weight Box (Banshee)
« Reply #10 on: January 24, 2014, 07:09:17 PM »
Quote from: Jim Mynes on January 24, 2014, 03:44:00 PM
The weight of the cigar tube might be too much by itself.
Small cigar tube, weighs .169oz.

Jim
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Jim Roselle

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Re: Wing Tip Weight Box (Banshee)
« Reply #11 on: January 24, 2014, 07:11:11 PM »
Quote from: Motorman on January 24, 2014, 06:21:45 PM
I hope the cap on that cigar tube holds the lead weight in.


MM
Screw top tube, closes tight.

Jim
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Jim Roselle

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Re: Wing Tip Weight Box (Banshee)
« Reply #12 on: January 24, 2014, 07:12:03 PM »
Quote from: 55chevr on January 24, 2014, 03:11:38 PM
innovative for sure, but a bit of overkill.   
But easy, very easy and I get to enjoy a cigar.

Jim
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Offline Steve Helmick

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Re: Wing Tip Weight Box (Banshee)
« Reply #13 on: January 27, 2014, 11:54:02 PM »
On a profile with the cylinder and tank on the outboard side, you'll need very little tipweight. I've seen some guys use a piece of 1/4" alum. tubing about 4" long, with a 1/4-28 socket head plug. Glue the tube onto the outboard tip rib and have the plug at the LE. Smash the opposite end flat. FWIW, lead "birdshot" kinda turns to dust as it rattles around and oxidizes. Tungsten fishing weights would be better. Steel birdshot should be ok.  D>K Steve
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Offline Avaiojet

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Re: Wing Tip Weight Box (Banshee)
« Reply #14 on: January 28, 2014, 05:24:11 AM »
R/C guys were using aluminum tubes at both wing tips on our pattern ships, back as far as the early 1980.

We would place the tubes at the CG.

Use the same tubes to hold the wing for rotation to do the finish and paint. Lot of guys did it this way.
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If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline Curare

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Re: Wing Tip Weight Box (Banshee)
« Reply #15 on: January 28, 2014, 06:49:55 AM »
Not where I come from we didn't! She's right mate! Just jam a 1/4" roofing nail in the wingtip!  ;D
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Offline RknRusty

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Re: Wing Tip Weight Box (Banshee)
« Reply #16 on: January 28, 2014, 09:30:07 PM »
I'm with you, Jim the Macanudo tube is cool. Might want to stake it with a bit of music wire or something in case the glue  lets go and it turns the first time you try to unscrew it. Damn, now I want a cigar!
Rusty
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Offline Paul Allen

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Re: Wing Tip Weight Box (Banshee)
« Reply #17 on: January 29, 2014, 04:03:55 AM »
This is how I did it on my Banshee.
Paul
In OZ
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Offline 55chevr

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Re: Wing Tip Weight Box (Banshee)
« Reply #18 on: January 29, 2014, 10:46:58 AM »
Good start ...
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Offline Tim Wescott

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Re: Wing Tip Weight Box (Banshee)
« Reply #19 on: January 29, 2014, 12:10:16 PM »
What's recommended in the kit is always good.  Remember that way too much tip weight means that you fly ugly, and way too little means that the airplane comes in on the lines and may crash.  You can decide for yourself which "too" is the better one to start with.

(it's not a sudden cliff or anything: just a bit too little tip weight means that the airplane gets a bit light at certain places.  But way too little tip weight definitely gives the flight a high pucker-factor.)

Remember, also, that if you change line length you'll need to retrim for (at least) tip weight and leadout location.
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The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

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