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Author Topic: Comet P38 Lightning - BUILD  (Read 4851 times)
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Russ Lister
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« Reply #75 on: April 01, 2019, 06:43:07 PM »

A Force 9 on the Jack Nicholson Scale, I would say.
Risk of structural damage.
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Rich Moore
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« Reply #76 on: April 10, 2019, 12:32:24 PM »

Had a lovely morning cutting out wing ribs. Horrid wood, but I've got to use it up somehow. Reminds me of kit-building when young , so quite appropriate really. (I acknowledge that kits nowadays include half-decent wood). I have already become deviant in that I've added notches for top spars to avoid bowed wings. The design is for a lower spar only, but I'm not falling for that. I've also added some additional wood around the nacelle nose because otherwise it'll look horrible, but I have avoided the temptation to infill fully because I wouldn't know where to stop.

I'll try and take a picture when wing is built...
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Mark Braunlich
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« Reply #77 on: April 10, 2019, 06:15:38 PM »

For your reference, Duke Horn's long lived and very successful Comet P-38 "White Lightning".
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« Reply #78 on: April 12, 2019, 03:55:39 PM »

Thanks Mark. It looks to me like Duke had the same thought - top spar added.

Hoorah! I have now submitted my entry form (in a characteristically inefficient way - sorry Mike). And, I've built a wing. I love building wings, but it is over so quickly. Fortunately, I have the other 'alf to make. The notches in the ribs didn't line up too well, but a bit of hacking and infilling with balsa wedges straightened the spars out. No one will know.
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Rich Moore
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« Reply #79 on: April 15, 2019, 07:16:22 AM »

Here we are.  Really crudely cobbled together and there is something wrong with the tailplane.
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Jack Plane
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« Reply #80 on: April 15, 2019, 09:25:34 AM »

That's a lightning build!  Grin
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« Reply #81 on: April 15, 2019, 10:50:17 AM »

Boom! Boom!
...... twin boom ....
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Rich Moore
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« Reply #82 on: April 15, 2019, 11:46:59 AM »

Oh dear - have you quite fin-finished?
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Rich Moore
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« Reply #83 on: April 15, 2019, 11:48:12 AM »

Whilst I like building wings, I don't like nose-blocks. Why am I building this and not a bi-plane?
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Pete Fardell
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« Reply #84 on: April 15, 2019, 12:34:14 PM »

there is something wrong with the tailplane.
Tailplane’s fine, but you need to move the rest of it up about 4 inches.

Looks great though!
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Rich Moore
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« Reply #85 on: April 18, 2019, 07:15:24 AM »

Wish me luck. I'm going in...silver tissue all over the place.








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TheLurker
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« Reply #86 on: April 18, 2019, 09:07:28 AM »

Wish me luck. I'm going in...silver tissue all over the place.
A fellow sufferer wishes you good luck.  It's... interesting stuff to work with and it positively eats scalpel blades.
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Rich Moore
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« Reply #87 on: April 19, 2019, 01:42:16 PM »

Oh dear! I messed up. Tissue going on ok,  but was impatient to see if creases would pull out of wing underside. Gave it a light misting. Yep, creases pulled out perfectly but trailing edge pulled around like a hinge due to small joint area (and hadn't put tissue to top yet). Another light dusting to relieve tension and added gussets to toughen up joint.  Wing now covered top and bottom and looking ok ish. I am doubtful about completing this in time. Might substitute the Bristol Fighter...


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Rich Moore
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« Reply #88 on: April 20, 2019, 07:07:12 AM »

Nearly ready to assemble...there are a few wrinkles but only water shrunk at the moment.
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danmellor
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« Reply #89 on: April 20, 2019, 03:07:39 PM »

Crikey: You are tearing through this one! It took all my self control to not pun there...

Cheers!

Dan.
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Rich Moore
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« Reply #90 on: April 22, 2019, 11:14:12 AM »

Talking about tearing... Tissue tears appeared on starboard wing from shrinking in the sun - oops. Should be an easy repair. I am unsure whether or not to dope this. This tissue does not need sealing, so I think I might just leave it.
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« Reply #91 on: April 22, 2019, 03:48:47 PM »

Looking good, Rich  Smiley

Building in the Sun.... reminds me of when I built a Garricoupe in the back garden in 1976. Not a pretty sight ... unless warps are your thing  Roll Eyes
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Rich Moore
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« Reply #92 on: April 22, 2019, 04:23:18 PM »

Not intentional sun building.
I've made some progress - I now have a weird silver, open top, tail-less glider. I am really rushing the covering and it shows (  Sad ). Looking forward to building something at a more enjoyable pace.
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Rich Moore
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« Reply #93 on: April 23, 2019, 04:42:48 PM »

Now it is taking shape. The top stringers have been added since this photo. Hopefully, the tissue covering will be completed tomorrow evening. I will try and resist sorting out the wrinkly bits - they're not too horrific. If this goes straight into a wall (likely), I'll have to repair things so the wrinkles will probably be 'repaired over' anyway.

How I'm going to keep this between the walls I don't know. I expect I'll have to maintain a tight turn and keep equal count of the turns.

I have cut out the parts for the canopy - I will assemble it 'kit-style' rather than vac-form it. That said, I have a form that'll do for the spinners, so I'll vac-form those.

I'm going to make it like the box art.

I still don't think this will be finished in time...
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Graham Banham
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« Reply #94 on: April 23, 2019, 06:10:58 PM »

Course it will Rich! You’ve still got 104 hours and 50 mins at this point till showtime and who needs sleep/ food etc.  Grin
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dputt7
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« Reply #95 on: April 23, 2019, 09:12:04 PM »

  I don't envy you covering with silver tissue, I would have thought it would be easier to give some white tissue a light spray of silver after it's covered,  or do you get penalised in competition for paint?
   I've built several "Indoor twins" without counter rotating props and found that 50 or so extra turns in the outer motor, always the right, keeps them turning as the power runs down.  Hope it all goes well.
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Rich Moore
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« Reply #96 on: April 24, 2019, 01:56:48 AM »

Yes-paint is penalised.  However,  so is not finishing/ getting all the details finished etc. But, I like the ethos of 'build it as close as possible to the kit'. Painting just wouldn't be right. I rarely deviate from the plan for Kitscale models.
50 extra turns to starboard it is - thanks.
It will be finished - I can add details whilst driving.
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« Reply #97 on: April 24, 2019, 04:30:34 AM »

Keep your hands on the wheel and your eyes on the road ...maybe use your toes?! .....
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Pete Fardell
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« Reply #98 on: April 24, 2019, 06:51:48 AM »

Details like a retracting undercarriage, or is that on the back burner for now? Either way, we’ve every faith you’ll be ready.
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Rich Moore
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« Reply #99 on: April 24, 2019, 08:08:17 AM »

The undercarriage will still be technically 'retractable' but I think I will probably temporarily disable it in wheels down position. I have to reign things back somewhere!
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