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HurricaneMkII (Read 152,559 times)
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Reply #380 - Jan 30th, 2019 at 10:03pm
 
Made up the forward sheet for the bottom center. The holes will be enlarged later. In the shot of the single gear, right at the rear bolt is the break in the Hurricane wing. Not where I'm breaking my wing I might add...I'm out 1 bay.  Huh Sign
But, with no break at the right place, I get a compound curve in the sheeting. Pffffft. Right now the sheeting is pinned and lying there with ammonia and lots of weight to try and bend the sheet around...

If you look closely at the "bottom sheet" you can see the outline of the wheel cover.
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« Last Edit: Jan 31st, 2019 at 7:03pm by Fingers »  

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Reply #381 - Jan 31st, 2019 at 7:08pm
 
And here are dummy covers lying in place for "gotta see this" purposes. Covers will be made of either litho or flashing material from my local home improvement depot...With a reflex in the covers they should close up flush to the surface  This is Good
I have a small piece of aluminum that would make 1 set of standoffs, need to \scrounge another
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Reply #382 - Apr 14th, 2019 at 3:21pm
 
OK, I've thought on this for a while (yes Glen, a looong time) Nah To You. Going to the 3 piece wing complicated the flaps a lot. What had been 4 flap panels has become 5, with 3 of them in the center section. I could have used 5 servos but didn't have the $$$$ so I'm trying this.
Mocked up so we can see it, and think about it. Yes Al,  it's likely over thought and over engineered  Gossip. Now for the pundits to kick in  Anyone.
All the ribs in the center section have a 1 5/8" hole, and those holes are lined up. I made a bunch of 1 5/8" ply disks, cut some copper tubing to act as bushings (I wanted bearings but Al said no  Smiley). I threaded the 5/32 rod, five nylon 5/32 nose gear steering arms, and the ply disks into the right sequence, stuck the disks into the rib holes, and Voila as the French say. I have a single torque rod, actuated by a 1/4 scale servo in there that I have to get mounted so it's removable, and the 1 servo will run the 5 flap pieces.
The outer wing panels each have their own servo.
Have at it guys.
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Reply #383 - May 18th, 2019 at 2:54pm
 
Feeling bit off today, so tried another item.....Kinda satisfying to see something covered, but not sure this is the correct fabric.
This is Super Coverite, and I'm wondering if it might be "too" finished for the Hurricane fabric. I know Phil Clark says that you shouldn't really see the grain of the fabric after the plane is painted. This stuff will certainly ensure that!
Iron on fabrics is getting hard to find since the demise of Solartex. What was Oracoat is available again from some places.
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Reply #384 - Feb 3rd, 2020 at 9:40pm
 
Well, it's only been 8 or 9 months.....what's the hurry?

All that aside, I'm back at it. Made a few decisions that might let me finish this thing. Firstly...

The Machine guns! Since this will be a MKIIc, it needs the huge honking machine guns off the wings. I spent a lot of time (way too much) trying to get info on the Hispano machine guns. I kinda wanted them to look kinda like they should (at 10 feet). I have the War Department Technical Manual for the guns; lots of pictures, lots of stuff, but didn't have dimensions, any. The Technical Manual tells me how to take the thing apart, oilk it. load it, sight it, but no dimensions. Finally, I got a nice note from the Curator of the Duxford museum, and he sent me a rough sketch of the barrel, with sizes. Off we go. A modeller from FB offered to make the guns, and sent me a very fine prototype so I ordered them, asking only that he make the gun an inch longer, on the back end. Package arrived, he added to inch in the wrong direction and over wrote the recoil springs......blah blah blah......' Wall Bash  First pic is his prototype file.

Anyway, I sat down and made 4 machine guns. Certainly not perfect, but they are 10 foot stand off scale so they will work.......even have the mount figured out.

Bit of cleaning up, and the bases have to be painted yet, but ...

And yes, Glen has told me to stop dithering over tiny details (I think the word he used was obsessing)  Margaree Night Beating A Dead Horse
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« Last Edit: Feb 3rd, 2020 at 9:43pm by Fingers »  

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Reply #385 - Feb 4th, 2020 at 8:49pm
 
Having made the wing 3 pieces, with aluminum spar, I was left with how i was going to fix the outer panels so they wouldn't slide off. All the torsion and shear is taken by the spar, is just the slide off that's of concern..

Many different methods out there, but most of them involved something through the top of the wing. Then I found Merlyn Wing locks, on RCScaleBuilder site. They are used a lot on large sailplanes and do the job nicely. I was just getting into making them from the Tutorial page on the site, when lo and behold they popped up on the site's list of 3D Printer files.

Greg Hatt made some prototypes from the file, we looked at them and thought about it, and he made 4 locks from PETg. I guess this is one of the stronger plastics.

Bingo. Work right some nice, and the hole in underneath the wing. Run a bolt up with a ball driver and it's done. Loosen with the driver and if the bolt stays inside, use a magnet on a rod.
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Reply #386 - Feb 16th, 2020 at 1:17pm
 
Of course the leading edge on the wing has to be drilled for the cannons. And of course the leading edge isn't 90deg to the center line of the plane...it has a 4 deg sweep. Angry

I bored a small piece of pine with the .75" Forstner bit, with the pillar drill bed tilted 4deg.  Thank You Loyal Fans Clamped to the LE, this "should"  Wall Bash Beating A Dead Horse  point my cannons in the correct direction..

Of course the one I have poking here would  be inset about 1 1/4 inch

As usual, I'll think on this for a bit  Roll Eyes........before I bore into the wing..... Cheesy
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Reply #387 - Feb 17th, 2020 at 2:46pm
 
OK, ignore the fact that wing is upside down in the fuse..... Angry  I just need a cradle to hold things while I took a look.... Wink

They came out better than I'd hoped, and using several references, totally TLAR. Since the cannons will be held in place by rare earth magnets in sockets behind the LE. they are removable for transport, plus I can work on maybe replacing them later.  Roll Eyes

Now I can put the retract lines on the gear, set up flap servos and sheet the bottom...then sand, and sand, and sand...
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Reply #388 - Feb 18th, 2020 at 12:17pm
 
Those look great Sandy!
I really like the rare earth magnet mount idea.
Worthy updates to the saga known as HurricaneMkII Grin

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Reply #389 - Feb 18th, 2020 at 12:25pm
 
Thanks Greg. The magnet idea is Glen's, but despite that I think it has potential  Grin!. Yeah. The sage is close to becoming a legend, or old wives tale. Heard about, whispered about, but never seen.

Some of the guys say I'm obsessive, over think things, or CDO. Pfffffft.  Beating A Dead Horse

The cannons and the wing attachment were the big hurdles; perhaps, maybe, just might, there's chance..... Roll Eyes

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Reply #390 - Feb 25th, 2020 at 9:18pm
 
And sometimes you do things just to see........
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« Last Edit: Feb 25th, 2020 at 9:21pm by Fingers »  

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Reply #391 - Mar 9th, 2020 at 7:23pm
 
Love the 20 mm canons; they are awesome!

Well done.
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Reply #392 - Mar 10th, 2020 at 2:45pm
 
Thank you Mike..... I'd love to be able to line them up this way but it's tough. Think I'll settle for the TLAR method.  Roll Eyes

A word to anyone who ever contemplates a MKIIc  Cheesy - decide BEFORE you start cutting stuff. Much easier to get holes bored at the proper angles and stuff.. Angry
I think this is rotated, and none of my utilities will fix it...

and excuse the shaky hands, still post time change  Cool
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Reply #393 - Mar 16th, 2020 at 3:38pm
 
This is all that's visible with the Merwyn Locks. Clean up the ends of the tubes...

A long ball driver will handle the bolts....might be nice to have a small electric screw driver
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Reply #394 - Mar 27th, 2020 at 3:44pm
 
Just planed the leading edge of one wing panel......does anyone need a bucket of tinder for starting fires??? Grin
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