Bottom Cowl on a Pacer

[Gilbert Pierce]

1400 hours on Steve's lower scoop and no cracks.

[mmoyle]

Finished the final trim on the cowl today. Making the bottom outlet from .032" 6061T6. Blue lay out paint. Little scribe, little center punch, little ham damner work and stretching of the center....


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[Steve Pierce]

Another daunting task that is very rewarding when done.

[wyandot jim]

mmoyle,

Did you make two of them?? I'm just starting on the lower cowl and need one

[mmoyle]

Made the first one out of oh two five 2024T3. After shaping gently.....needed hammer work...but found one crack. Then decided on 6061T6. Wasn't Real careful on the initial shaping...knew I could beat on it for a bit without creating cracks. Bent the tabs over, then hammer formed over a mandrel (bucking bar with 1/8" radius edges). I may use a 750 degree tempil stick, heat and quench the part to take out the work hardened areas..... Let's see.... Fill the bath tub with cold water..... Propane torch in the bathroom. Honey...what you don'n? Sh..it! Just melted a hole in the shower curtain......Ummm.....noth'n


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[CamTom12]

Hahahahaha!

[rsrguy3]

Mr smooth. Glad our wives dont know each other. I was vacuum bagging composites on the kitchen table in a hotel room, all the wife did was roll her eyes.

[DougG]

I used 3003 for lower cowl and outlet in one piece. Maybe not the perfect job but works good. I redid baffles at same time using RV-6 drawings, dropped CHT by almost 100 degrees fh.

[Steve Pierce]

I just bent the tabs to form the lip around the bottom cowl. No hammering. Here are pictures of one I built.
https://photos.app.goo.gl/ny62oeyvssYaFcyX6

[mmoyle]

Finished up the lower cowl piece today... Another reiteration. First not quite right. Modified it, use as a template.
The lip is 1/4" longer than the drawings call for.