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Author Topic: P-30 Spitfire Build  (Read 3446 times)
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Bigbandito
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« Reply #50 on: July 17, 2018, 03:02:35 PM »

Good am bandito. I can't figure out where you or the plan went wrong. I have check the plan and everything seems to fit OK. None the less I am glad you went and found the problem areas. I want build this as soon as I can clear the bench which may be a while. Let us know exactly what the problem was, I am glad you found a cure.


I think the sheeting on top of the center section also adds too much height to the wing, making for an awkward fit.

Although I allowed for it in the rebuild I still had to sand the dickens out of it to get a perfect fit. I might have been able to do that with the old section but I think I would have had to sand it away to nothing. Que sera sera.


After thinking about the problem I ran into, looking at the plan further, and [especially] thinking about covering the wing I have come to the conclusion that the 1/32" sheeting is probably supposed to be on the bottom of the wing instead of the top. My thinking is as follows:

  • It is obvious to me now that the 1/32 top sheeting caused the center section of the wing to be higher than what is intended to fit in the fuselage slot. That's why I had to sand down the sheeting even on the rebuild.
  • My initial reaction to this was that the top line in the drawing for the center spar section should be lowered by 1/32 to accommodate the sheeting. A closer look at the plan reveals, however, that the center section spar doubler (1/64 ply) appears to be raised 1/32 or so above the bottom most tips of the "wings" that mate to the inner ends of the dihedral spars, thus providing an allowance for bottom sheeting.
  • As you may have read in one of my earliest posts, my plan is to model an early 1940 MkIa with a white underside in general, but with a port wing underside of black. If I cover the starboard wing in white tissue and the port in black, I'll need to have structure at the center section of the wing to glue it to.

Ergo, center section sheeting on the bottom makes sense.

After reaching this conclusion I have a new dilemma as to whether to 1) add sheeting to the bottom center section and remove it from the top, 2) add sheeting to the bottom center section and leave it on the top, or 3) add a 3/32" square down the midline of the underside to provide structure for the tisse. The last option is probably the least attractive one and if it weren't for the unnecessary weight I'd quickly opt for the second. perhaps I'll weigh a suitable sheet and see what kind of penalty I'd be accepting in leaving the top sheet on.

-- In any case, don't start building your P-30 Spit until you've read at least this far.  Grin Cheesy Huh
 
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« Reply #51 on: July 17, 2018, 03:33:23 PM »

Sheeting on bottom surface would reinforce the area where the wing-retaining rubber bands will go...
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« Reply #52 on: July 17, 2018, 03:34:00 PM »

I say if you have it fitting leave it. And if it works do the bottom too. You will appreciate the beef. Build it to fly but be prepared for a really nifty 'flying cartwheel", a few of my early Spits were gifted gymnasts. Roll Eyes
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« Reply #53 on: July 17, 2018, 04:27:29 PM »

I agree, door no. 2.   Just sheet the bottom and call it good. 
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Bigbandito
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« Reply #54 on: July 17, 2018, 05:18:47 PM »

Got it - sheet the bottom and move on.  Thanks.


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« Reply #55 on: July 18, 2018, 10:07:54 PM »

Felt like doing something a little different tonight. Making templates for the camouflage.
https://uploads.tapatalk-cdn.com/20180719/9e9bbd3bb57087e4da3fc376b382524d.jpg


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« Reply #56 on: July 22, 2018, 08:44:25 PM »

Not much accomplished this week. We’ve got a lot going on in real life.

Rounded up some 3/32” OD brass tube and 1/16” steel rod for propeller shaft. Opened up the propeller hole to fit over the 3/32. The 1/16 will engage with the molded-in ramp on the propeller. I’ve got brass washers for shaft bearing and will be looking for suitable slippery stuff for between them.

https://uploads.tapatalk-cdn.com/20180723/70c7845f557d8f299b032ed292f9a85c.jpg
https://uploads.tapatalk-cdn.com/20180727/ddb015b3da191d03030873ab7843d3cc.jpg



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« Reply #57 on: July 27, 2018, 07:21:21 PM »

Doing the final sanding on major parts tonight. Will start covering tomorrow.
 
Weights at this point:
Fuselage 14.37 g
Wings 19.44 g
Horizontal Stab 3.46 g
Rudder .51 g

Total 37.78 g

I hope I can keep the whole thing under 60 g.
https://uploads.tapatalk-cdn.com/20180727/96865588bbbe01cf5dd94bed0220bd73.jpg
https://uploads.tapatalk-cdn.com/20180727/5dce5d21408e11c462f63c708158a234.jpghttps://uploads.tapatalk-cdn.com/20180727/d3a52fc2d2557641710b3fa13ad08a28.jpg
https://uploads.tapatalk-cdn.com/20180727/af17d9346b4005018eff645358fb1b58.jpg


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« Reply #58 on: July 27, 2018, 07:28:04 PM »

Preshrinking and painting some tissue for the rudder and horizontal stab.
https://uploads.tapatalk-cdn.com/20180727/2a407a0c8d7a433cb8a9cf45bdd6c9a7.jpghttps://uploads.tapatalk-cdn.com/20180727/4658b15adc7087988b11b3038a94633b.jpghttps://uploads.tapatalk-cdn.com/20180727/dc13a5047637fad54a8e4921e2f8aaf5.jpg


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Bigbandito
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« Reply #59 on: July 27, 2018, 08:50:46 PM »

Covered the rudder with preshrunk prepainted tissue and underside of horizontal stabilizer with fresh white tissue. Shrank the stab tissue and applied first coat of DM Colortool “Flat White”.
https://uploads.tapatalk-cdn.com/20180728/34d9da3ddc9f1acf4c07d1149fea7a15.jpghttps://uploads.tapatalk-cdn.com/20180728/d359d2d486c781d369e39ba4f65ee816.jpghttps://uploads.tapatalk-cdn.com/20180728/a92a0a9635e5e85c2ac3e2929518bd10.jpghttps://uploads.tapatalk-cdn.com/20180728/18574926b098d3ba8d88cb65aaa001cf.jpg


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Bigbandito
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« Reply #60 on: July 28, 2018, 01:36:38 PM »

More covering and painting today. Cut out camouflage templates for the stab, laid out poster putty (acme blue tack) to mask the edges. Came out OK.

https://uploads.tapatalk-cdn.com/20180728/4208cdada3027308981a4b6e72417692.jpghttps://uploads.tapatalk-cdn.com/20180728/c18c40596827244d039f00adc9615f34.jpghttps://uploads.tapatalk-cdn.com/20180728/83a3e1466eb63048b905d5ee7a919ace.jpghttps://uploads.tapatalk-cdn.com/20180728/f75000a450246861476539ced9b07078.jpg
https://uploads.tapatalk-cdn.com/20180728/533feff364129bb50e0cdc8088a737da.jpg

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Crabby
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« Reply #61 on: July 28, 2018, 01:56:20 PM »

try this: roll out some silly putty (with a rolling pin) on something smooth (not wood) cut to shape with exacto blade. Good tip is to lay down wax paper before you roll, cut, then you can handle it by the paper, position it then peel away paper.
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« Reply #62 on: July 28, 2018, 02:03:10 PM »

Thanks for the tip Crabby. The stuff wants to stick to my hands more than the paper.

Underside of wing covered and painted. Looks pretty cool of you ask me.

https://uploads.tapatalk-cdn.com/20180728/3b3f7d3408cd055198567ad01889a8cc.jpg




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« Reply #63 on: July 29, 2018, 03:20:26 PM »

The “tail feathers” are almost done. They’ve got some wrinkles in ‘em, but I ain’t doing ‘em again.

The paint and vinyl did a number on the weight. H. stab is up to 5.71 g and rudder up to 1.75.

Painted the fuselage parts that might be visible through the cockpit.

https://uploads.tapatalk-cdn.com/20180729/b38ca9c15eddb877260c38631a58db0f.jpghttps://uploads.tapatalk-cdn.com/20180729/3d4faf96c5002f50767fec68b1ccadd2.jpghttps://uploads.tapatalk-cdn.com/20180729/ba7aa076c666a26072a950fc7a3a3a50.jpg


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« Reply #64 on: July 29, 2018, 08:24:27 PM »

BB:  Nice looking Spitfire.  Great job on the build and paint.
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« Reply #65 on: July 30, 2018, 04:49:10 PM »

The “tail feathers” are almost done. They’ve got some wrinkles in ‘em, but I ain’t doing ‘em again.

Yeah, I know that feeling.  Smiley
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« Reply #66 on: August 04, 2018, 04:56:56 PM »

Today I finished the tailplane and wings.

https://uploads.tapatalk-cdn.com/20180804/f3c46d93bdb711c41d4e361656675706.jpghttps://uploads.tapatalk-cdn.com/20180804/af68e14b7bfa13254c7c06ea89eae9a4.jpghttps://uploads.tapatalk-cdn.com/20180804/927d806cf32bce1d08553088cb4bc406.jpghttps://uploads.tapatalk-cdn.com/20180804/8e8ecdbd0688705411754a8aafd4d90d.jpg


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« Reply #67 on: August 25, 2018, 04:52:16 PM »

Been away for a while (I tend to build in spurts). Starting to cover the fuselage today.

https://uploads.tapatalk-cdn.com/20180825/799555ed692456da585cbb689a2bef5e.jpghttps://uploads.tapatalk-cdn.com/20180825/56c1b55cdc02ee7e6c6c2d994654f7be.jpg


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« Reply #68 on: August 26, 2018, 02:24:17 PM »

More work on the fuselage. Finished the tissue work.

https://uploads.tapatalk-cdn.com/20180826/66a9536f1cc08b55fdba0943df16eb9f.jpg
https://uploads.tapatalk-cdn.com/20180826/a3230c3171694d628828632e7e8eb07a.jpghttps://uploads.tapatalk-cdn.com/20180826/a3416436a6e7e8074a981c186f3eb560.jpg

Prepped for a coat of white on the underside.

https://uploads.tapatalk-cdn.com/20180826/6927eafe4f86b7135ac33f88389d14a5.jpghttps://uploads.tapatalk-cdn.com/20180826/64e5de19c209bef76056f124059fdf6a.jpghttps://uploads.tapatalk-cdn.com/20180826/298c44ddb32a14f6ef76c1efc606a527.jpg


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« Reply #69 on: August 26, 2018, 02:28:29 PM »

Finished the wings.

Template for drawing flaps and vinyl applied. I could never be a surgeon.

https://uploads.tapatalk-cdn.com/20180826/71acb425f8f04a1a1df75dcfc00bc40e.jpghttps://uploads.tapatalk-cdn.com/20180826/eb36424f7ad6d2d55a51a9e18c032f21.jpg

Over sprayed with matte finish and done.

https://uploads.tapatalk-cdn.com/20180826/ccf1d31ba50c857250b21f93e13a309d.jpghttps://uploads.tapatalk-cdn.com/20180826/e639e5819ae9a87ed7aa84a585eceb6f.jpg


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