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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  S-67
03-01-2018 12:30 PM  5 months agoPost 301
garyl

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taxachussetts

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When are you going to put that stepcraft to work? I may have something for it soon.

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03-04-2018 12:54 PM  5 months agoPost 302
bwellmaker

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Long Island

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UIH,

Ugh, work has been getting in my way the past several days but I have been plugging away at the structure and the spar to sponson templates are almost finalized.

Both forward and aft spars will run through the fuse. The forward spar will support the left and right main landing gear and the aft spar will support the stub wings. The spar for the stub wing will mount with a couple of screws to the aft spar with access for removal through the gear well. The stub wings need to be removable for transport. The sponsons will just be covers and will also be removable for access.

At present, the spars are not part of the structural support for the mechanics. Once the spars are fit to the inside of the sponsons I will tape the spars to the mechanic structural and see if it's possible to install them as one piece. If not, the mechanic support will be installed then the spars. We will see.

A couple of pics.

B

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03-07-2018 04:14 PM  5 months agoPost 303
bwellmaker

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Long Island

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UIH,

I was able to cut the outer shape of all the Dragon Plate ribs over the past couple days. Next is to mount the mechanics to the rails so I can cut the inside of the ribs to the correct height to support the mechanics. I had a bunch of T-6063 aluminum "L" angle that has a radius on the inside to make the mounting brackets but can't seam to find it so had to order some more. Once the mechs are positioned, any extra material will be removed from the rids. I usually cut the ribs to be around 12 mm wide and add lightning holes where needed to keep the weight down however will have to look at it once the mechanics and rails are placed. I will add a couple stringers to tie all the ribs together which will make a pretty robust structure.

A few pics of the fit ribs with the sponsons installed.

UIH,

B

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03-07-2018 10:17 PM  5 months agoPost 304
bwellmaker

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Long Island

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UIH,

I cut the ribs to hold the mechanic rails today. The rails need to go about 5 to 7 mm lower to get a tail drive shaft angle as close to zero as possible but it is a start. Once the rail height is correct I can work on setting the torque tube housing and shaft and placing the aft bulkhead to support the IGB. From there move to placing the TGB and getting the alignment correct for the IGB to TGB shaft. This is pretty critical schnizzle so it will take a bit to get right.

The main drive gear has about 5 mm clearance on each side so we good there. When building something like this you always measure like 50 times and cut once. It was great to see the mechanics sit very close to the final position and fit exactly how I hoped the would.

A few pics of progress today.

UIH,

B

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03-07-2018 10:25 PM  5 months agoPost 305
ssmith512

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Indianapolis, IN USA

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Fo shizzle mah nizzle, that sheet be jumpin!

Props again for not keepin it on da down low.

Werd to ya mutha.

Steve

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03-07-2018 11:55 PM  5 months agoPost 306
bwellmaker

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Long Island

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What???

Thanks Mang

Dis ride is FLY!!!

UIH,

B

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03-08-2018 12:54 AM  5 months agoPost 307
chopper37

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NJ and Long Island

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Couple more snow days and you’ll have it flying

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03-09-2018 01:47 PM  5 months agoPost 308
bwellmaker

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Long Island

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UIH,

Started mocking up the tail drive torque tube housing. The IGB drive end mounts to the torque tube housing with 3 screws. My thought was to mount the housing permanent into the tail cone however access to those screws would be impossible unless I drilled access holes in the fuse which I would rather not do. There is a bulk head just forward of the IGB for support. I mocked up a couple of "L" brackets that mount to the IGB then to the bulk head. I will be able to access those screws from the back and slide the housing out from the rear as an assembly.

The alignment of the housing to the tail output on the mechanics was almost spot on but needs a little tweak. I left the mechanics sitting a little high on the frames so I could check the output angle to the tail drive shaft before the final fit. The rough measurement was 4.5*. I was hoping for around 3* so will have to play around with raising the IGB and lowering the main mechanics a touch. My guess, it might make a .5-.7* difference, if that, but we will see. 4.5* is well within the stated limits of the articulating joints so we in the ball park.

Some pic,

UIH,

B

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03-09-2018 04:04 PM  5 months agoPost 309
chopper37

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NJ and Long Island

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Looks quite robust, nice

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03-09-2018 04:19 PM  5 months agoPost 310
Thumper217

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Slidell, LA - USA

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Looks like a good set up, similar to what I did on the S-76, remove 3 bolts and the whole boom tube pulls right out the back. For the short section of tube going up to the tail I made frames that the tube passes through but can still slide up and down and secured them to the fuse to hold the boom in place. I only used one screw in the tube to secure it to the IGB at the back just to keep it from moving up & down.

Are you going to replace the IGB gears with the new ones from Vario?

Thumper

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03-09-2018 04:39 PM  5 months agoPost 311
bwellmaker

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Long Island

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UIH,

I remember your 76 set up. It is very nice the way you designed the install. I do not have nearly as much room so this was what I cam up with.

The "L" bracket on top will not be used. With the other gear installed I would not have access so will just mount on the sides.

It may be a bit of overkill but is will be pretty stout that for sure.

B

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03-11-2018 01:21 AM  5 months agoPost 312
buster1

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Manhattan, NY

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amazing Butch.

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03-12-2018 02:33 PM  5 months agoPost 313
bwellmaker

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Long Island

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UIH,

Thanks Mang,

I busted out the TGB mount and bulkhead this weekend. This was a case study on installing 1 lb of schiznitz into a 1/2 lb bag. With a little work it all fit. That's amazing, who would have thunk.

The power train is pretty much mocked up. I have "eyeballed" the shaft angles and fitment of the bulkheads and supports and they are pretty close. Next I will get the mechanics mounted to the rails then go through the power train from front to back making the minor adjustments to get everything lined up, double and triple check everything about 10 times then tack the bulkheads in place.

Some more pics.

UIH,

B

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03-12-2018 09:33 PM  5 months agoPost 314
garyl

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taxachussetts

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You either have small hands or that TGB is beefy.

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03-13-2018 02:37 AM  5 months agoPost 315
bwellmaker

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Long Island

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UIH,

It is actually the size of the Vario gear box.

As this build needed a 5 blade tail rotor, I sourced the box and hub as a unit. I reached out to a friend who had a friend who was a cousin of a brother who knew a guy...

This is making me crazy.

HA

UIH,

B

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03-21-2018 09:45 PM  4 months agoPost 316
bwellmaker

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Long Island

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UIH,

Main landing gear torque box. The gear will be actuated by a single servo mounted on the center line of the fuse connected to the through shaft. I used some off the shelf bearing blocks to support the shaft. The gear trunions will mount between the blocks and the struts will slide and mount into the trunion

B

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03-22-2018 02:44 PM  4 months agoPost 317
ssmith512

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Indianapolis, IN USA

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Smack it up, flip it, rub it down, OH NOOOO!!

Pretty dang cool Butchman.

Steve

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03-22-2018 03:13 PM  4 months agoPost 318
bwellmaker

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Long Island

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Thanks mang,

Digging out of 17" of snow that dropped last night.

UIH,

B

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03-22-2018 03:30 PM  4 months agoPost 319
ssmith512

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Indianapolis, IN USA

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bwellmaker
Digging out of 17" of snow that dropped last night.
Ouch. I hear microbrews are good for keeping the body temps up.

Here in crazy Indy, yesterday morning we woke up to 25 degrees and 3" of snow on the ground and by 3pm, I kid you not, it was 48 degrees and ALL of the snow was completely gone.

Steve

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03-25-2018 12:58 PM  4 months agoPost 320
bwellmaker

rrKey Veteran

Long Island

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Dang,

It was pretty warm here after all the snow but it's still lingering around. Should be all gone in a day or so. Glad I have a 30 inch 25 HP snow blower to move dat schit. I am ready for 85 and sunny that's for sure.

It's hard to see progress when making small schnizzle. I made the mechanic mounting rails and finalized the cut outs in the bulk heads where the rails will sit. Next, cut the tail drive shafts "close length" put on some ends then get them in the boom then place the boom in the tail cone. This a pretty critical step making sure the boom and shafts are perfectly aligned and the correct length. Using the boom for the input and output of the IGB make it easier to get stuff in the proper alignment.

UIH,

B

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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  S-67
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