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Author Topic: Fitting a Cowl around a .75  (Read 2421 times)

Offline Don Jenkins

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Fitting a Cowl around a .75
« on: December 29, 2017, 07:19:17 AM »
I've not been doing much building or flying around the holidays, but I finally got inspired to start working on the Dreadnought again.  Two days of therapeutic sanding and shaping (with the Dremel and mostly by hand) and I've got the cowl fitted around the PA .75.  Its now ready for blending around the spinner and final sanding.  I'm not sure how many "tools" with sandpaper glued to them that I used, but I made a few more for the task.  The more I build the more I enjoy sanding, used to hate it!

Happy Holidays!

Don
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Offline Steve Helmick

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Re: Fitting a Cowl around a .75
« Reply #1 on: January 03, 2018, 11:23:17 PM »
Muffler, eh? Is that gold plated LG & wheel panties from Randy Aero? Had to do it, you understand. Looks very nice, as usual!  y1 Steve









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Offline Don Jenkins

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Re: Fitting a Cowl around a .75
« Reply #2 on: January 04, 2018, 06:19:17 AM »
Quote from: Steve Helmick on January 03, 2018, 11:23:17 PM
Muffler, eh? Is that gold plated LG & wheel panties from Randy Aero? Had to do it, you understand. Looks very nice, as usual!  y1 Steve

I was unable to obtain a header and pipe in a timely manner, so I opted to go with a muffler since I want to get this one done for the 2018 season.  The landing gear and wheel pants are the only thing that remained from my last plane that was destroyed on pavement (yep, trashed the engine too), I just haven't gotten around to sanding them down in preps for a different paint scheme.

Don
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Offline Don Jenkins

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Re: Fitting a Cowl around a .75
« Reply #3 on: January 16, 2018, 06:21:51 AM »
Final sanding complete!

Don
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Offline Manuel Cortes

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Re: Fitting a Cowl around a .75
« Reply #4 on: January 16, 2018, 08:34:59 AM »
Well done!!!!

Congratulations.

Manuel.
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Offline wwwarbird

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Re: Fitting a Cowl around a .75
« Reply #5 on: January 16, 2018, 07:21:52 PM »
 Very nice work Don!  y1
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Online Brent Williams

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Re: Fitting a Cowl around a .75
« Reply #6 on: January 16, 2018, 09:58:21 PM »
Nicely done.  Thanks for sharing your work.
Very cool seeing the process in action. 
Kinda clears up a few questions I had about fancy cowl construction techniques.
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Offline Don Jenkins

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Re: Fitting a Cowl around a .75
« Reply #7 on: January 17, 2018, 04:36:15 AM »
Thanks for the nice comments guys!

Don
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Offline MikeyPratt

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Re: Fitting a Cowl around a .75
« Reply #8 on: January 17, 2018, 05:49:57 PM »
Quote from: Don Jenkins on January 16, 2018, 06:21:51 AM
Final sanding complete!

Don


Hi Don,
Nice work and looks great.  Now put a layer of .5 glass on the nose & cowl with epoxy to keep it looking good for a long time.  Also coat the inside of the cowl and tank compartment as well.  Keep up the good work.

Later,
Mikey
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Offline Don Jenkins

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Re: Fitting a Cowl around a .75
« Reply #9 on: January 18, 2018, 05:14:44 AM »
Quote from: MikeyPratt on January 17, 2018, 05:49:57 PM

Hi Don,
Nice work and looks great.  Now put a layer of .5 glass on the nose & cowl with epoxy to keep it looking good for a long time.  Also coat the inside of the cowl and tank compartment as well.  Keep up the good work.

Later,
Mikey

Thanks Mikey.  This entire plane will be covered in .5 ounce glass cloth and epoxy resin, then primed and painted with Klass Kote Epoxy products.  The wing and tail are already covered, next step is to attach them!  I'm weighing everything as I go so I can defend using this finishing method against the skeptics that say it will be too heavy.  I'm shooting to keep this one at or less than 64 ounces.

Don
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Offline Serge_Krauss

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Re: Fitting a Cowl around a .75
« Reply #10 on: January 18, 2018, 06:54:10 PM »
I've found that I can apply .56-oz glass with epoxy at or below the weight of even a doped surface because of the small amount of epoxy necessary to fill. This is under the condition that I keep the glass against the surface - no floating, as seems to occur with dope.
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Offline MikeyPratt

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Re: Fitting a Cowl around a .75
« Reply #11 on: January 19, 2018, 10:19:16 PM »
Quote from: Don Jenkins on January 18, 2018, 05:14:44 AM
Thanks Mikey.  This entire plane will be covered in .5 ounce glass cloth and epoxy resin, then primed and painted with Klass Kote Epoxy products.  The wing and tail are already covered, next step is to attach them!  I'm weighing everything as I go so I can defend using this finishing method against the skeptics that say it will be too heavy.  I'm shooting to keep this one at or less than 64 ounces.

Don

Hi Don,
I haven’t used Klass Kote Epoxy products before, so I’ll take your word for it.  The last stuff I used is K&B epoxy and that worked awesome.  Years ago before there was vaccume bagging, I used .75 glass cloth and K&B clear epoxy to attach the cloth, place a layer of plastic wrap over the glassed wing and squeeze out the excess epoxy.  Let it cure over night and when the plastic wrap was remover you had a perfectly smooth surface.  This method worked great on team racers and Goodyear.  I used the same method on wheel pants a few times and they turned out great.
Where are you getting the Klass Kote products?

Thanks,
Mikey
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Offline Don Jenkins

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Re: Fitting a Cowl around a .75
« Reply #12 on: January 20, 2018, 05:43:16 AM »
I got the Klass Kote paints from their web site.

Don
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