BearHawk 5 school of construction

[way_up_north]

Good Day follow BH builders, I read everything I could find on internal corrosion protection of 4030 tubing. It is encouraged in AC43 to use boiled Linseed Oil. After a review of the ALL the products I could find including long term engine preservation oils. IMHO, In the case of 4130 tubing. Linseed is still the best choice at $10 a liter. I plan to inject any part that I can with it. Bell cranks got a few drops & then I sealed the hole with weld. It does not take much oil. The oil naturally spreads and crawls its way around everything. I simply tested it by dipping some linseed oil on the fab table. Within a day it spread like a fugus over the table. I see why the old generation chose to use it. Anyways.. I can ramble on about details. After fabricating these tiny little bell cranks, I realized that these little parts are fairly challenging to fab & weld. Needing something to take pictures of & post, I included pictures of a simple jig I designed to get the job done quickly & accurately. Be sure to use backers in all the bushings during welding. The backers are not just heat sinks! There purpose is to simply take up the space so air has a more difficult time getting into contact with the interior surface of the bushings during welding. Alrighty time to get back to work. PM's are open for anyone who requires a more detailed explanation of my ramblings. Cheers ta all

Your post reminds me of what my grandfather taught me… while watching him wind up an old clock… I asked him what was the cotton balls in a small tray on the bottom of the clock for

he explained that you put oil on the cotton balls… close the door to the clock… the oil slowly atomizes over time and coats all the gears in the clock..

I appreciate the time and effort you put in to post online.. I’ll be following your fuselage construction with great interest

[Camflyer]

Im enjoying watching your progress. You do some nice work! I cant wait to get in my shop amd make some parts!

[triumphantduke]

Oh almost forgot, this is actually beneficial information if you read my ramblings about BH. In the attached photo DWG 11B. There is a measurement circled in RED! At 1st glance a fabulous BH fabricating warrior may see 3"7/16 When in the real BH fabricating world this measurement is 3"1/16. Pay Attention! It freaking matters! Thank me later :-)

Yes, I'm enjoying to what I can glean before building. The answer might be obvious for some... but would you please elaborate on the "7" vs a "1" ? Just vertically down there's another one.

[Sir Newton]

3"7/16 is a type O & is wrong. At the very least it is poor penmanship. 3"1/16 is the correct distance for the arc required to stroke the aileron.

[triumphantduke]

ah okay, thank you. I was scratching my head thinking I might need to re-review fonts for GD&T.

[Sir Newton]

Hola fellow BearHawkers, Happy to report & post pictures in what is turning out to be a serious education in aircraft riveting. YES I said riveting. Myself & my partner in life (wife) are growing closer in understanding one & other because of this task in the rabbit hole of building a plane :-) Combined time of 29hrs to date, we have progressed fairly well imho. We have riveted RH under side of all the nose ribs & have started down the topside of the nose ribs forward of the main spar. Riveting this area is BUCKETS of fun! oh you just wait & see. I have included a few pictures for the lookie loos that enjoy the visual experience. Well.. if you have made it this far in my echo chamber of a post. I have some heart felt advice for ya. While building your scratch built nose ribs keep in mind that you have to get around the lighten hole flanging with a bucking bar! Over flanging will require you to be able to build custom bucking bars. Nothing to be afraid of, just prepared for is all. I have noticed the depth of flanging on the factory kit ribs with greater understanding now. Other then that Pound Your Rivets with Pride... on that note. adios

[Frank]

That's pretty cool, kimosabe!

[Camflyer]

Awesome! Keep it up!

[Sir Newton]

Greetings, Long time no posting. Did I ever get distracted from posting. I am still working on the BH5 at least 5-15 hrs per week. However I am sharing a picture of my distraction. I got a little drinkie with some of the older pilots on the airfield. & by the end of the evening I bought a Mustang 2 ... lol, Anyways, Now I am flying around in the solution to my next mid life crisis. Rotflol.

[Sir Newton]

Fellow builders, I have had a very exciting spring & summer this year. The BH5 project has not taken the back seat completely. I am sure to schedule time every week to get something completed. This helps me stay current on the project. Both my wings are out of the riveting jig now. All the linkages & ail/flap hinges have been fit up. Now I am ready to final fit flaps & ailerons to the wings. Make any adjustments that may need to be made. So the wings & control surfaces look professionally biult & fit.
If anyone is planning Abbotsford Airshow 2022 & would like to meet up. I will be on site for the weekend. Cheers to all. May all your winds be tailwinds.

[rodsmith]

Great looking wings

[way_up_north]

tis a thing of beauty

[Nev]

Fantastic progress !

[Sir Newton]

Good day! to the good members of the Bearhawk community. Allow me to post a product review for Carbon Concepts mobel B wing tips. I recieved my wing tips in good order. The fit & finish on the workmanship is 100% The tips come all trimmed up in light grey primer ready to be installed. The trailing edge of the tip is left open to allow a prefect fit to the wing. I happened to have a wing up on fab stands for a quick test fit. The fit is 100% imho. Have a look at the attached photos.

[Hewko]

Nice! Do they add 18 inches per side?

[Sir Newton]

Yes they do. All off 18"
My photos do not do them justice.

[kestrel]

For confirmation and clarity. Do they add 18" per side more than the stock tips? Is the total wingspan 3 feet longer than with the stock tips? They don't look that long.

Other possibilities are that they extend 18" beyond the bare wing or they are 18" long but don't quite extend the span from the bare tip that far because there is overlap on the tip rib.

[Sir Newton]

For confirmation & clarity ..lol
I have never seen a stock tip. So I can not speak to that. However, Yes they add full 18" measured at the leading edge. Not counting the engagement onto the wing. So that is a full 36" to the overall wing span.

[kestrel]

Cool! For comparison, my original round (alpha?) 4 place tips add about ~7 1/2 inches to the side span per side. That would make your tips 10+ inches per side longer. The Hoerner tip is also a superior shape to the stock round ones.

[Sir Newton]

I was also going to say that in one of my pictures there is a 4ft level on top of the wing. You can use that as a measuring stick to verify how big those tip really are.

[Sir Newton]

Hey ya all, 2023 is almost here & I am not flying my BearHawk as planned back in July of 2020. All though it has been a good year for being evolved in aviation. I got distracted with the purchase of a Mustang 2. Of course the mustang needed work so I had to get that done & then learn to fly it 18hrs & 105 lands & take offs now. My 1st conventional gear airplane, it lands at 80mph 60% power. You land it like your trapping on a aircraft carrier. Needless to say I now consider myself a fully checked out tail wheel pilot. However always room for improvement. The BH Model B wings are both very close to completion now. I really want to make the BH a priority. I am getting set up to fit & weld the fuselage. Being a welder by trade this is very much my wheel house. Posted some pictures of my ailerons & flaps mounted on the LH wing. I was pleased with the trailing edges lining up nearly perfectly. Bob sure did a good job of the wings prints. Follow his measurements & all works out great. Ok that is it for my rambling. C ya sometime. Cheers

[Sir Newton]

Greetings, We are making big plans to attend 2023 SUN n FUN !!
Yesterday I completed the fitting & tacking stage on my BH5 lower frame. I used a hydraulic bender to make the bends up to the tail section. Drilled #20 communication holes between every tube on both ends. Through a quick down hand MIG pass on the covered sides of each joint. Everything went really smoothly. With a close inspection you may be able to pick out some mods. Starting the upper frame today & Looking forward to the end of March.

[Sir Newton]

Greetings to the builders who follow my online ramblings. It was a good week for the BH5 project. Got to work & tacked up the upper frame with some added personality. Next we tear apart the cheap 7/16 OSB table & fabricate a quick jig using the horses to mate these halves together. Yes I somehow forgot OR plan old missed ordering tubing for Station "O" I need to fire the project manager. It has been ordered & I was promised a cost effective speedy delivery. lol :-( Posted some pictures for the curious observers. Sharing is caring freinds. Sun N Fun 2023 I will be the guy with the smile on my face.

[Sir Newton]

Today was going to be a putz around tear down my make shift layout table, drink beer & clean the hangar day. I promptly got very side tracked with cleaning & through together a down & dirty fuselage jig. I only roughly lined up the upper & lower frames. Quickly realizing how big the BH5 cabin is going to be. It is massive! The weather in northern Alberta is turning for the worst so I will be able to dial the two frames in & mate them up. Then we will be rolling rolling. Welding that is :-) cheers

[Sir Newton]

If figured I would just add a comment about this really shoddy frame mating JIG turned out.
It is working surprisingly awesome. I fiddled around getting everything leveled up & centered up. took a couple of hours & everything is inside of 2mm of error. I set the tail post & then finished cutting & copping vertical T-9 tubes for H-J, & G-K