Boot Cowl Business

[@justinahern9729]

Cowl me crazy but it looks like you're making some mighty nice progress. Great video!

[@ColbyOsborn]

😁😂

[@ludwigrieger7556]

Well done, you are getting it and I love the way you make plans to do stuff. Enjoy!

[@jordanshepherd3088]

Looking good. My only tip would be to make sure you are deburring all of the holes.

[@ColbyOsborn]

Thanks! Wish I wouldn't have forgotten to mention or include any clips of deburring holes, but all holes were deburred. Appreciate the watchful eye and heads up!

[@davefreeman6105]

I've had a hard time visualizing the details of how the boot cowling goes together. This helps a lot!

[@sonshinelight]

Hey, Colby. Great job. Next month's our trigger date to throw down a deposit on our 5 kit. My son (co-builder) just graduated University of Calgary, BofS mechanical engineer, yesterday. Regards, Brian.

[@ColbyOsborn]

Thanks Brian! That’s outstanding! Exciting times for both of you guys. Tell your son congrats on the big time degree! Bet it serves him well.

[@cr-us9ch]

Excellent. I think you did a great job

[@ColbyOsborn]

Thanks!

[@ryanraspotnik3962]

You guys are doing great work, I’ve really been looking into one of these, so its great to see your progress! Good luck and I can’t wait to see more!

[@ColbyOsborn]

Thanks, Ryan!

[@الثااقبالصباحي]

Thank you, my dear

[@Pajad]

Lookin good! :D great progress!

[@ColbyOsborn]

Thanks!

[@1966pahandyman]

nice brake/ladder, will try and remember that

[@av8rk9]

Fantastic video ... just what I needed for my Patrol ... how are you planning to access your instrument panel for maintenance ?

[@ColbyOsborn]

Thanks Bill! I may regret it and find myself modifying things but right now my plan is to have a large 10” EFIS and not much else. I’m hoping removing the large display will create enough access for most maintenance needed. Otherwise I’ll have to pull the windscreen and boot cowl off.

[@JosephHHHo]

Have you tried various forms of power shears to see if it does better than the jigsaw for the rough cut?

[@ColbyOsborn]

Lots of options out there that are probably better than the jigsaw and hand snips I use. I thought about buying a nibbler. But since there's not that much sheet metal work to be done with a BH quick build kit, I decided to just use what I already had. I wouldn't recommend a jigsaw to someone that didn't already have one. But if you leave the protective plastic on the aluminum and use blades designed specifically for extra thin sheet metal, it doesn't do to bad.

[@BDombrowski2]

Hi, were did you get Bruce's templates/cad drawing for the landing gear struts, I can't seem to locate his build. Byron D

[@ColbyOsborn]

Hey Byron. I found a link to them in the online builders manual. You should be able to download them from Bearhawk.tips at bearhawk.tips/772 (3 separate PDF's linked at the bottom of the page).

[@BDombrowski2]

@@ColbyOsborn Thx I found them, Good Job By the way on your build, This is my fourth experimental build but first bearhawk, and you seem to be just a maticulous as I am. I Plan on splitting my instrument panel, to allow each side of the panel to be removable for access. may be an idea for you!

[@ColbyOsborn]

Fourth experimental build! That’s awesome! I may end up doing something similar with the panel if I can figure out how to do it reasonably easy. Appreciate the tip!

[@plane-fuzz]

outstanding workmanship! (is it getting easier with less mistakes)

[@ColbyOsborn]

Thanks, Dave! Easier and more fun every day! 😁

[@daverobinsonTnT]

Very well done (two thumbs up). By-the-way, did you have any problems with the #6 fasteners having their heads snap off if slightly over torqued ?

[@ColbyOsborn]

Since it's all coming back off I have not torqued anything down. I hope that doesn't happen though! Is this a problem specific to stainless or cadmium screws specifically?

[@daverobinsonTnT]

@@ColbyOsborn It was a problem at an OEM where I had to perform a corrective action fix for liaison engineering in the aftermath of a root cause investigation carried out by engineering methods. Turns out that using power tools often resulted in the torque causing too much shear stress in the fastener and thus the head breaking off (Cad plated MS35206s or MS35207s I believe they were). They stopped using power tools to install the fasteners and changed the design guidlines for subsequent installations. This had to do with instrument installations in the instrument panel of an aircraft, not external components.

[@ColbyOsborn]

Very interesting. I didn’t run any down tight and was using the stainless steel MS24693 screws. Good information to know for when I do install them permanently. Thanks!

[@Ko3n3k33]

Dang sir, that looks great!!! Any chance you have a link to that cad drawing so I can download it now in case it ever disappears? And, was that 18° angle on the instrument panel the final number you ended up going with?

[@ColbyOsborn]

Thanks! I went with the 7 degrees recommended in the builders manual. Somewhere around 18 degrees flat on my bench made for 7 degrees once installed. The cad drawings are linked on Bearhawk.tips at bearhawk.tips/772.

[@Ko3n3k33]

@@ColbyOsborn You're a god send sir. After watching the video for a fourth time I think I understand everything. Thanks so much for all the info!

[@ColbyOsborn]

Haha, thanks. Always appreciate your encouragement.

[@wareintheworldrv9108]

Where do you buy or how do you make that edge roller?

[@ColbyOsborn]

I bought one from Aircraft Spruce. www.aircraftspruce.com/catalog/topages/averyedgetool.php?clickkey=15784

[@bluehornet6752]

Be careful using a drill on the screws into those nut plates. There's a fair bit of heat developed from friction, and the nut plate and screw heat up and cool at different rates--so they often get locked together and you'll get to drill out the nut plate and replace it. Otherwise it's looking awesome!

[@ColbyOsborn]

Thanks, Tom! Appreciate all of the tips and compliments.

[@timepass-oc2kj]

fantastic video i try to know about silver ultralight aircraft design calculator may teach design carculator me plz thanks u.

[@الثااقبالصباحي]

Are all materials aluminum

[@ColbyOsborn]

The boot cowling is aluminum, except for the firewall and tunnel at the bottom are stainless steel. The fuselage tubing is 4130 chromoly steel.

[@hamidsk2573]

are you an experimental builder or an aerospace engineering

[@ColbyOsborn]

Just an experimental builder.

[@claytonosborn50]

Gosh, if I would have known I was going to be on camera for so long, I would have cleaned up a bit! haha

[@الثااقبالصباحي]

Why does no one want to help me?