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"Spook" can it be done?

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re: balsa spook build

Post  happydad on Sun Apr 28, 2013 10:04 pm

Phil: for the prototype the length of the fuselage is just about right for the CG per plan based on my pee wee .020 and no fuel tank.
edited 8:14p.m. PST - NOTE - i started with the CAD drawings which were for the plastic parts and made the balsa parts exactly the same to start with. hd

Rusty: same answer as above as far as the engine mount being as close to the leading edge as possible for the .020 version. before i glue anything into place i will measure the CG with a .049 engine, babe/black widow type, held in place with tape or rubber bands. i expect the nose to be a little shorter.

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Last edited by happydad on Sun Apr 28, 2013 10:16 pm; edited 1 time in total (Reason for editing : added note)
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re: spook .020 balsa version update

Post  happydad on Sat May 18, 2013 8:05 pm

I have had some time to work on the pee wee .020 balsa version of the Cox Spook again. I attached a bent 1/16in. piano wire for the landing gear to a plywood mount with waxed string like that used in the old days to tie off wire bundles. the ties were epoxied for additional strength and the landing gear mount was epoxied between the fuselage pieces for additional strength behind the engine mount.

bottom view of the fuselage showing landing gear mount


note: the pee wee .020 is only shown in position when relative CG was measured.

top view of fuselage showing fuel tank area


elevator assembly



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Re: "Spook" can it be done?

Post  Cribbs74 on Sat May 18, 2013 9:19 pm

That's a good idea on the landing gear. It should hold up well. Is that the amount of offset you plan to use? Or is it just placed that way for now.

The only reason I mention it is because it would probably keep tension with much less. Not critiquing at all.

Looks like it's coming along nicely! Good job. I need to get off my duff and make one soon.
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re: .020 balsa Spook landing gear

Post  happydad on Sun May 19, 2013 3:14 pm

Ron: this is the 1st prototype, so everything is rough until it actually is flown. that's where you come in.  hd  Small Cox Logo

edited 6-15-2013 3:20p.m. PST - also the engine slipped from it's temporary rubber band mounts while shooting the pics.  happydad


Last edited by happydad on Sat Jun 15, 2013 5:21 pm; edited 1 time in total (Reason for editing : added comment)
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Re: "Spook" can it be done?

Post  Cribbs74 on Sun May 19, 2013 3:35 pm

happydad wrote:Ron: this is the 1st prototype, so everything is rough until it actually is flown. that's where you come in. hd Small Cox Logo

Cool!

I can pretend I am Chuck Yeager. I'd be happy to maiden it. I am also good at making repairs. Thanks HD.

Ron

Edit: repairs if I crash.....which doesn't happen much anymore Wink
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re: .020 balsa Spook update

Post  happydad on Sat Jun 15, 2013 5:18 pm

here are pics showing the bottom landing gear area with sheeting completed and the top fuel tank area with and without the cover installed. the 1st prototype is almost finished and ready for covering. p.s. as I covered the tank and engine mount areas I covered the areas with at least 3 coats of fuel proofing.

bottom landing gear to engine mount area.


top showing fuel tank area to engine mount, covered.


top showing fuel tank area to engine mount, cover removed.


current weight without front wheel, or engine and uncovered is 4.3ounces.

that's all for now.

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Re: "Spook" can it be done?

Post  Cribbs74 on Sat Jun 15, 2013 10:36 pm

It's looking real good!!!! Fun times ahead! Need to figure out a way to launch the thing though.

Ron
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Re: "Spook" can it be done?

Post  sdjjadk on Tue Jun 25, 2013 10:31 pm

Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.


Last edited by sdjjadk on Tue Jun 25, 2013 10:33 pm; edited 1 time in total (Reason for editing : Any c)
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Re: "Spook" can it be done?

Post  Cribbs74 on Wed Jun 26, 2013 12:16 am

sdjjadk wrote:Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.

If you can wait a bit I can provide a whole set of plans in PDF form. Please remind me though as I have a lot on the brain at the moment.

Ron
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Re: "Spook" can it be done?

Post  batjac on Wed Jun 26, 2013 3:30 pm

happydad wrote:I have had some time to work on the pee wee .020 balsa version of the Cox Spook again. I attached a bent 1/16in. piano wire for the landing gear to a plywood mount with waxed string like that used in the old days to tie off wire bundles. the ties were epoxied for additional strength and the landing gear mount was epoxied between the fuselage pieces for additional strength behind the engine mount.



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No, no no! Right thrust! Riiiggghhtt thrust!

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re: engine offset

Post  happydad on Wed Jun 26, 2013 9:06 pm

as noted, the engine mount was rubber banded in place to check the CG and balance. during the taking of the picture the engine/mount slipped. the plan is to use 1 to 2 degrees of right offset.
 sorry for no updates lately, but I have had problems with a hot water leak, then a noisy water heater. I have finished the engine mount, covering the bottom of the fuselage and almost finished the fuel area screw-type cover. more pictures to come as I have time.  happydad Small Cox Logo
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re: cox spook rib tracing or outline

Post  happydad on Wed Jun 26, 2013 9:13 pm

sdjjadk wrote:Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.

sorry I must have missed your posting. I have the full size drawing and a template of the spook rib as cut, (not as used). during the course of building Ron Cribbs and I decided to use a hard leading and trailing edge instead of using thin balsa over the leading edge and trailing edge of the wing to add strength. i'll try to dig up the drawing and template and send a photo after dinner, (it's 7:12p.m. PST here in So. CA).  happydad Small Cox Logo
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Re: "Spook" can it be done?

Post  pkrankow on Wed Jun 26, 2013 9:28 pm

cribbs74 wrote:
sdjjadk wrote:Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.

If you can wait a bit I can provide a whole set of plans in PDF form. Please remind me though as I have a lot on the brain at the moment.

Ron

I too am looking forward to a PDF of the images.

Please put scaling reference lines so I can tell if my printer is printing properly. A vertical and a horizontal "this line is X units long" goes a long way.

Phil
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re: spook ribs

Post  happydad on Wed Jun 26, 2013 11:41 pm

pkrankow wrote:
cribbs74 wrote:
sdjjadk wrote:Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.

If you can wait a bit I can provide a whole set of plans in PDF form. Please remind me though as I have a lot on the brain at the moment.

Ron

I too am looking forward to a PDF of the images.

Please put scaling reference lines so I can tell if my printer is printing properly.  A vertical and a horizontal "this line is X units long" goes a long way.

Phil

I included a ruler showing the length of the rib. also on the drawing showing the hard LE and TE we used on the prototype. also a drawing for you showing 1/2 of the wing. PM me if I can help more.

ribs.

enlarge print so the ruler is correct.

wing.


hope this helps.

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Re: "Spook" can it be done?

Post  sdjjadk on Thu Jun 27, 2013 7:16 pm

Cool Thanks. Smile
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Spook Flying

Post  COXSWAIN on Sat Jul 13, 2013 3:25 pm

Hi, I got two Spooks with engines from Toy-R-Us about 1967. About $4 apiece. Built one and taught myself to fly inverted AOK. Nice plane, ran great and was sturdy. Never built the other, a collector heard me talking about it and made offers at every Collecto we went to. Finally sold it for $225 about 1998. Seemed outrageous at the time but ya know collectors.
I had replaced it about 1970 with a Sterling 1/2 A wildcat that flew even better! Still got it. It has an old Cox RR-! on it. Got tired of em running backwards all the time.
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Re: "Spook" can it be done?

Post  batjac on Sun Jan 19, 2014 1:40 am

Sorry to resurrect an old thread, but did any .pdf plans get made up for this? I'd be interested in a copy if possible.

The Re-animator Mark
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Re: "Spook" can it be done?

Post  getback on Sun Jan 19, 2014 9:31 am

I no I no but if its knot toooo much trouble I also would like a copy of the plans? got to much going on right now but would like to spook'em to later, tring to lean away from the planes w/out wheels so far getting one to come out of the chair just ant working for me  Very Happy  nice build HD  Smoking LOOKING GOOD !!
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Re: "Spook" can it be done?

Post  ekitten2 on Sun Jan 19, 2014 9:48 am

indeed a full size set of plans/pdf would be gr8!
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Re: "Spook" can it be done?

Post  Cribbs74 on Sun Jan 19, 2014 10:38 am

I have the CAD file and PDF still somewhere.

If anyone wants it let me know and I will send it to your email. Shoot me a PM if interested.

Ron
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did you ever get the rib template?

Post  happydad on Sun Nov 01, 2015 3:59 am

sdjjadk wrote:Cool build. Smile
Any chance someone here could send me a tracing of the wing ribs? I've always liked the Spook and I wouldn't mind making some templates for a future foam core Spook build.

did you ever get the rib template?

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Re: "Spook" can it be done?

Post  ekitten2 on Sun Nov 01, 2015 4:30 am

im still interested as well
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Re: "Spook" can it be done?

Post  Ken Cook on Sun Nov 01, 2015 6:17 am

That long nose not only prevents tight turning but it appears to be very fragile in the event of a crash. It wouldn't take much to snap that nose off. Big Otto suffers the same problem and both planes are extremely similar. As for flying characteristics, it seems to me that it flew relatively better than the currently available RTF planes of the time but I certainly feel that it wasn't stellar. For the thickness of the wing, I would imagine that the engine was certainly in need of more dilithium crystals. Ken
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I still have the original rib template

Post  happydad on Sun Nov 01, 2015 1:54 pm

ekitten2 wrote:im still interested as well

Ekitten2: I still have the original rib template and can send a picture of the template or better after lunch I will take a picture with the rib template next to a ruler and post it here. I did post some pictures during the build back in 2012-2013, seems like yesterday. I'll also look up the original post and post the link here as shown above. More later.

happydad RC Plane Flying a Plane Money Toss Money Toss Burning Cash Burning Cash Fireworks
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Re: "Spook" can it be done?

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