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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion Docs  Time to start: BK 117
12-26-2010 07:18 AM  9 years ago
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Christopher J

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Kansas City, MO Californian lost in land of Oz

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Time to start: BK 117

Decided it was time to get crackin' on my BK since i'm breaking down the HH-1H for primer and body work.

I picked up some parts from Thompson Fuselage (not on yet), got the body up on skids, mounted upper cowls and hatches as well as doors. Almost all openings are cut and sanded. Tonight I put the handles on as well as the magnets to keep them from vibrating or "hopping" when the heli is running. Next I'll cut the small openings for the vents and screens on the upper cowl doors and glue in the magnets for them.

After that's done I'll work on mounting the base for the mechanics as well as the structural support that stiffens the back of the fuse for the rear opening doors.

After my normal routine of "shake down" flights I'll be painting it in the red, black, and white color scheme of one of DRF's BK 117's.
Christopher J
same as I ever was
"Still all set & Flying the original"
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12-27-2010 06:32 AM  9 years ago
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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this will be another nice one from your model factory. will be looking forward to itdrive a rotary, fly a rotorcraft
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12-27-2010 04:22 PM  9 years ago
sean911sc

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San Diego

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The games is afoot.William S Harris
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12-27-2010 04:27 PM  9 years ago
smokie

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Lawrenceburg In. Dearborn

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looks good keep the pics.coming.

Dave
Raptor 90
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12-27-2010 05:28 PM  9 years ago
dave35495

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canada

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good to see you start a new project.keep up the good work christ ,don't forget to post pic as u build
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12-31-2010 12:08 AM  9 years ago
skijones

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Dothan, AL

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Looking good
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01-16-2011 02:45 PM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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did some fine fitting of the doors, they all function in a much more smooth fashion now. just took some sanding. Next will be getting the upper cowl openings to shape better, may need to heat them with the heat gun a little...I DO MEAN LITTLE!

Any one know how I can get them to keep thier shape once heated and "bent" to shape?

After tinkering with the doors I'm working on the floor pan and internal fiberglass and wood formers next. Updated pics coming as I do that.
Christopher J
same as I ever was
"Still all set & Flying the original"
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01-16-2011 03:25 PM  9 years ago
doorman

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Sherwood, Arkansas

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Looking Real Good.......
Christopher, keep the pics coming... looking real good.....

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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01-16-2011 08:07 PM  9 years ago
antja

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Levin new zealand

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cowls and doors
You can heat and bend them as much as you like but unless you add some bracing to hold them they will eventually go back to their original shape .

Tony.
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01-24-2011 06:03 AM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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Here is how the doors are fitting at present. At the time I cut them they were perfect in fit but with the winter months the basement although heated is cooler then normal and the doors have "spread" and are no longer a snug fit. So after talking to Doorman and thinking about Antja's recommendation I'm going to be making formers to secure to the insides of the cowl doors to pull them to shape

Once glued in, these ought to do the trick getting the doors conform back to shape. I'm goung to use light ply for its rigidity. The piece here is easily shaped bass wood that I'm using as a template. I'll get some pics once I get the formers glued in.

May take a few days....I hurt my back at work and standing too long kills me.
Christopher J
same as I ever was
"Still all set & Flying the original"
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01-24-2011 09:12 AM  9 years ago
antja

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Levin new zealand

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if you glue the formers in but over correct them slightly then add
two layers of 100g glass cloth to the inside of the door ,when the glass sets you can remove the formers the doors will retain their shape . You can lay both pieces of cloth in one layer of resin
laid diagonal with each other much better than one 200g layer.
laid together they will add very little weight.but only over correct a small amount.

Tony.
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01-28-2011 04:24 PM  9 years ago
tombat1

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Darlington IN

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My BK 117 Paint choice
I always wanted to build a BK and couldn't find a fuse. We have a Lifeline Heli in Indiana and always liked it.title] My Gallery Photos
[img] /fastphoto/3443/lifeline003.jpg [desc]

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01-29-2011 01:55 AM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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I like the paint scheme. It would take some serious masking and patience but it's do-able. Do you have access where you could take close up photos?Christopher J
same as I ever was
"Still all set & Flying the original"
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01-29-2011 06:12 AM  9 years ago
Mojave

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Palos Verdes, Ca. USA

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Another option to fix those doors, you could carefully apply a heat gun and over correct the contour a tad. Then when they cool and you're satisfied with the fit, apply an extra layer of glass to the inside. I have to fix my huey doors and doghouse that way.All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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01-29-2011 04:47 PM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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I tried heating them and holding them till they cooled. They "sprung" back to thier original position so I've traced the inner cowl and made small formers to epoxy to the inside of the doors. I'll paint the insides when I paint the fuse to help blend them in looks wise. I'll more then likely sand them down as well so they're not as obvious when the doors are opened.

For now though I'm going to turn my attention to getting the mechs fit.
Christopher J
same as I ever was
"Still all set & Flying the original"
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01-31-2011 01:18 AM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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Didn't get to mount the mechs this weekend but a little work to the doors as mentioned above. Here are some before and after pics. As I said earlier I will sand these down and paint the inside.

The bottom still sticks out just a little still but it's nothing the magnets wont take care of
Christopher J
same as I ever was
"Still all set & Flying the original"
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01-31-2011 04:08 AM  9 years ago
doorman

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Sherwood, Arkansas

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Looking Good!!!!!!!!!!!
Nice job on the bracing....looks as if it did the trick...might not be a bad idea to add a little epoxy and glass as the others suggested to help keep them there, but I think the wood is going to make them stay......keep'r'going!!!!!!!!!!!!

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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01-31-2011 06:27 AM  9 years ago
Mojave

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Palos Verdes, Ca. USA

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Nice, very nice Looks like the fix works...All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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02-03-2011 12:30 AM  9 years ago
Christopher J

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Kansas City, MO Californian lost in land of Oz

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I've kicked it up a notch....
Due to the blizzard that affected most of the Midwest I was off work today so spent my day in the basement working on the 117. I broke down the mechs to be fit. I trimmed the floor pan to depth so the swash sits about 5mm under the cowl at hover position but still has some foward tilt to it (the floor, not the swash), as well as get the opening for the mechs trimmed. I had to do a number trial fits to get the mechs far enough back so they looked correct. Cut the opening in the upper cowls for the swash and linkages.

The wood plate under pan is now drying. When that's done I'll drill the vent holes in the sides of the pan then epoxy it in place as well as the plates for the landing gear clips.

Stay tuned, more to come.....
Christopher J
same as I ever was
"Still all set & Flying the original"
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02-03-2011 12:43 AM  9 years ago
dave35495

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canada

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christ the heli looked good coming along fast so u think it should be done around spring time for test flight ?
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