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Apr 05, 2012, 02:04 PM
Registered User
Magnets may not be a bad idea. Will they hold though?
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Apr 05, 2012, 02:22 PM
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Woodstock 1's Avatar
Yup!
Apr 05, 2012, 02:37 PM
Wind Powered
george@dream-flight's Avatar
I think that magnets (like the ones used on a Weasel for example) would do the job.
I guess you could cut some recesses in the root rib...and do the same on the fuse.....
Apr 05, 2012, 02:46 PM
Piscine Promulgator
surfimp's Avatar
Quote:
Originally Posted by fabmaster911
Magnets may not be a bad idea. Will they hold though?
Yes: https://www.rcgroups.com/forums/showthread.php?t=392270

They are way more than good enough for what you need. Use neodymium "rare earth" magnets, something around 3/8"+/- in diameter and you should be totally golden.

Proof of their holding power: 2m Voltij that weighs ~1700g doing tons of snaprolls:

Voltij at the Ruins: Snaproll Fest (4 min 2 sec)


Steve
Last edited by surfimp; Apr 05, 2012 at 02:57 PM.
Apr 05, 2012, 02:47 PM
Piscine Promulgator
surfimp's Avatar
Quote:
Originally Posted by g_rod22x
I think that magnets (like the ones used on a Weasel for example) would do the job.
I guess you could cut some recesses in the root rib...and do the same on the fuse.....
With the caveat that the magnets as used on the Weasel aren't ideally oriented for wing retention. It's an easy mod though: http://www.stevelange.net/2010/05/01/weasel-evo/

Steve
Latest blog entry: Of Fish, France, FPV, and Fun!
Apr 05, 2012, 02:54 PM
Registered User

flying stab?


anyone considering this? no idea how hard it would be to modify or if it would be worth it. mine is on the way and I am enjoying the premaiden modification discussions.
Apr 06, 2012, 01:04 PM
Cable ties & ductape
DodgeRC's Avatar
Im very tempted to try the magnets out, from what ive heard they hold up!
Plus will have 2/3 spars to stop rotation.

My concern is, if they are that strong, can you still get the wing off?!
Apr 06, 2012, 05:17 PM
Slopeaholic
jimbo320's Avatar
Has anyone got a vid of the new speedo yet?
Apr 06, 2012, 09:10 PM
Registered User
Here's a few picks of my finished build. Went out for the maiden, but the wind decided to not cooperate this afternoon (wrong direction for all the local slopes) although it was 20 - 40mph. One thing that surprised me was how much lead this thing took to balance. I have it balanced close to 70mm. R2 Hobbies suggested 30-33% from the LE and Cody at Skip Miller suggested starting at 65mm.

You can see from the photos that I have a lead block at the front of the canopy opening on top of my battery. This is in addition to cramming as much weight as far forward as I could. I have the tip full of leadshot to maybe 1" back, then a 2/3 A 1500 Mah battery (3 cells horizontal with 1 vertical at the nose end) plus a decent amount of lead wire filling all the empty space above, below and to the sides of the battery. Haven't had a chance to weigh the thing yet, but I find it hard to believe that this will fly in 12km/h winds as R2's site says. I think the original will fly better in lighter winds. We'll see though... Tomorrow's wind speed and direction looks promising.

One last thing, the fuse is much thinner than the 1.2 Speedo and with the less than ideal landing zones here in Colorado I am thinking of possibly socking the front portion to at least the front of the canopy opening. At a minimum I think some fiberglass cloth and epoxy around the seam stretching back to the start of the canopy should help. This would allow me to take some lead out, but add to the durability.

Hopefully I'll have a report tomorrow and maybe some video...
Apr 06, 2012, 09:33 PM
Cable ties & ductape
DodgeRC's Avatar
Am I right in thinking that this is the MK 3 'Lite' version? Not the fully moulded one?

Looks nice!! And cant wait for your review! the 1.2 would take off if someone farted but this one does look more chunky.

Also how do the elevator rods hold up? look slightly flimsy?
Apr 06, 2012, 10:04 PM
Registered User
They seem up to task. It came with 2 fiberglass guide tubes for where the rods exit. I may glue them in, but this way provides way less resistance as far as I can see.
Apr 06, 2012, 10:13 PM
Entropy is happening!
Jim.Thompson's Avatar
Quote:
Originally Posted by DodgeRC
..............
My concern is, if they are that strong, can you still get the wing off?!
That is my concern for the use of magnets for plug in wings on such mouldies as my MiniVector.
If using them, some provision for starting a small wedge might be necessary. Otherwise, damage could be done I expect.
I don't know as I have never tried them for retaining wings.

Jim.
Apr 06, 2012, 11:06 PM
Bogan of distinction
Stehl's Avatar
http://www.soaringusa.com/Wing-Tool.html
Wing tool
Apr 06, 2012, 11:16 PM
Entropy is happening!
Jim.Thompson's Avatar
Thanks Stehl. I will order a couple.
Apr 07, 2012, 02:54 AM
Slopeaholic
jimbo320's Avatar
I've been learning aerobatics with my 1.2 thermo. I have a bendy plastic joiner. I use a conservative amount of tape over just the LE and TE. On a heavy impact, no damage occurs, wings just separate from fuse and each other.. I love the old speedo mounting system. It takes harder abuse than some of my foam.
J.


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