Anybody use these ?

[steve pagano]

I am thinking about using some to hold a hatch door on. Anybody try these before?

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXRFG6&P=ML

 T.I.A.
Steve

[Richard Entwhistle 823412]

I have used a much smaller set of six magnets to hold a Strega cowl on.  One set on the front and two sets on the rear.  They were maybe 1/4" dia. and were very strong.  I feel that a .7" may be too strong for the job.  I would bet that balsa will pull apart be fore the rare earth magnets would let go.

Later
Richard

[steve pagano]

Were did you get yours from?

[Ralph Wenzel (d)]

One good source for these magnets is Lee Valley Tools - - http://www.leevalley.com/wood/page.aspx?c=2&p=58750&cat=1,42363,42348

They have a fabulous line of woodworking tools, and a Razor Plane that is excellent. See:  http://www.leevalley.com/wood/page.aspx?c=2&p=56750&cat=1,41182,41188

[Richard Entwhistle 823412]

Steve
Go to http://www.kjmagnetics.com/proddetail.asp?prod=ZD1.  The ZD1 is on close out for 100 for $5.00.  They are the ones I used and were very strong.

Richard

[Mike Spiess]

Used them quite a bit on RC glider canopies. I also use a bigger one at work to find studs in walls and as a clamp in stringed instrument repair. They are strong you only need a small one I used 1/4" round x 1/16 thick for RC glider canopies. and sometimes it was hard to get them off. I get mine from KJ they always seem to send small sample magnets just the right size for our use. I also made a prop balancer from two larger magnets.

[bob branch]

I have used magnets for some time in RC. We use them to hold on canopies and now cowls. I used them on a vector arf to eliminate the screws for the cowl, or the quarter turn latches I used to use. There are a few things you want to know to get them to work correctly. First know that they hold down, they do not hold laterally or provide lateral guidance. You must provide lateral stability for the hatch or cowl both at the front and the back. Magnets work best at the back of a hatch or cowl with an interlock system at the front end. They can also be placed mid hatch and work well but you need to allow for less leverage and usually use a stronger (larger) magnet.

I just completed a cowl using a vertical pin (2X56 rod)on each side of the front top block extending into aluminum tubes (same size as come in clunk tanks to go thru the stopper) in the cowl front block for the front lateral guidance and they are long enough so they cannot displace off with the cowl held down by magnet in the back. At the back of the cowl under the fuel compartment I placed a cross member and secured a 6X36 blind nut to with the blind end out. The magnet attaches to that blind nut and is recessed and glued into the cowl bottom block. Lateral guidance at the back of the cowl (it extends the full length of the tank compartment) is just by a one inch long 1/8 inch square piece of balsa running along the inside edge of the fuse side so no lateral movement is possible. 

This is just a mod of the method Bob McDonald taught me years ago only the read lateral guildance was accomplished by the shape of the cowl bottom block seating into the fuse bottom block. Retention was by a 1/4 turn latch to the front fuel tank compartment bulkhead. I have used this on several arf vector 40's and it works fine as well.

bob branch

[steve pagano]

I order the 100 pack tuesday night and got them this morning! The only problem is i may need a lot more! Im having too much fun throwing these things at the fridge and dryer 

                                       Thanks guys!

[bob branch]

Try passing cars.


I didn't say that. I was never here.

[steve pagano]

Try passing cars.


I didn't say that. I was never here.

A friend on mine came over and started throwing them at the ceiling (i Think it's tin or something?) and they stuck! When i went to go get a ladder turns out my dad lent it out  

[bob branch]