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Build Thread, Page :  1   2  [ 3 ]  4   5   6   7   8  (158 posts, 20 posts per page, 8 pages in total) [ < Prev ] [ Next > ]
LASTWOODSMAN, Image # 3859016 May 17 21:08

Winding Stooge, 22" Sig Cabinaire, me and Trapper - out to Jackson Park to give rubber band free flight a try. The Winding Stooge needed adjustments for the holes for the piano wire through the rear aluminum tube motor mount, as the plane would not fit - interference from the stab with the uprights of the stooge.
LASTWOODSMAN, Image # 3858716 May 17 11:21

The piano wire in the top goes through the aluminum tube rear rubber motor peg in the fuse. The four bungie cords go to tent pegs and hold the stake solid into the ground while winding the rubber motor.
LASTWOODSMAN, Image # 3858616 May 17 11:15

Home-made over-engineered WINDING STOOGE and 15:1 WINDER
LASTWOODSMAN, Comment for image # 3857514 May 17 09:43
Thanks gentlemen.
Don C, Comment for image # 3857514 May 17 09:38
Worth the effort.
John M Oshust, Comment for image # 3857513 May 17 21:31
I love when a plan comes together. Cannot wait to see the completed air screw. Kudos!
LASTWOODSMAN, Image # 3857713 May 17 21:12

Side View - and now to experiment to get the right color of stain, by practising on left over sawed off pieces of the prop block. "Cabernet Red" is so dark, that it does not even show the painted grain line layers. "Golden Oak" and "American Walnut" are best so far. I will try mixing a few drops of "Cabernet Red" in with "Natural" wood stain to try to get a light red color stain.
LASTWOODSMAN, Image # 3857613 May 17 21:06

Rear View - now to design an ornamental, scale-like Prop Hub Mounting Plate worthy enough to adorn the front of this prop. The prop might be a tad bulky, but better thatn too thin - better to quit while I am ahead ...
LASTWOODSMAN, Image # 3857513 May 17 21:02

VOILA !! - FINISHED !! after 5 more hours - Front View, of the 9 1/4" AXIAL Prop for the BMW 160 hp engine, "hand carved" (sanded and filed), and sanded to 320 grit, with 8 laminated layers of 1/16" balsa planks, with "Burnt Sienna" brown gloss and "Bronze" Metallick acrylic paint, painted alternately between the layers.
LASTWOODSMAN, Comment for image # 3856413 May 17 09:53
Thanks BP - I am just one of those very slow builders - I spend more time just looking at it and pondering, than actual sanding ...
biplane guy, Comment for image # 3856413 May 17 08:11
You do know you can buy those for $4.00 with a hole already drilled, right? Just yankin' your chain, LW. That's really nice work.
LASTWOODSMAN, Comment for image # 3856412 May 17 20:56
The scallops of the lower blade faces, coming out of the prop hub, need to be deepened, and their leading edges will be rounded and smoothed in last. The fat, thick blades still need to be thinned out to final air foil thickness, and the blade tips will be finished last.
LASTWOODSMAN, Image # 3856412 May 17 20:52

5 MORE hours of slow, careful, meticulous filing and sanding and examination. The outer blade faces are sanded to an air foil shape form, with sharp leading and trailing edges. The blades have a slight "twist" in them from root to tip.
LASTWOODSMAN, Image # 3854412 May 17 10:49

A couple more hours of work - reverse side of prop
LASTWOODSMAN, Image # 3854312 May 17 07:09

LASTWOODSMAN, Image # 3854212 May 17 07:05

John M Oshust, Comment for image # 3854112 May 17 05:25
Mother Nature is really something wondrous!
LASTWOODSMAN, Image # 3854111 May 17 22:28

LASTWOODSMAN, Image # 3854011 May 17 15:31

The inner arc of the blade is now blended into the outer blade scallop.
LASTWOODSMAN, Image # 3853911 May 17 14:22

A few hours later ... This is really nerve wracking ! - I have been mostly counting the blade scallop sanding strokes with a 1/4" round steel file, with more time stopping and examining and comparing the oposite blades and brushing away sawdust, than actual sanding. Working very slowly, but surely.
Build Thread, Page :  1   2  [ 3 ]  4   5   6   7   8  (158 posts, 20 posts per page, 8 pages in total) [ < Prev ] [ Next > ]