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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › AH-1W Super Cobra - Build Thread
09-29-2018 11:41 PM  73 days agoPost 21
bwellmaker

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Long Island

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I know what it is.

Very nice work my man.

Watch at YouTube

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09-30-2018 06:19 PM  73 days agoPost 22
jbewley

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Fairfield, PA

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My guess is that the device moving up and down is going to make the collective in the pilot's hand move.

Jim

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10-01-2018 11:14 PM  71 days agoPost 23
Sleeper

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Cincinnati, Ohio, USA

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I knew that. Gayl

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10-02-2018 01:18 AM  71 days agoPost 24
ssmith512

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Indianapolis, IN USA

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Haha! I love the flux capacitance from the dual modal encabulator!
jbewley
My guess is that the device moving up and down is going to make the collective in the pilot's hand move.

Jim

Steve

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10-13-2018 09:38 PM  59 days agoPost 25
ssmith512

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Indianapolis, IN USA

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'Twas Maiden Day today.........

Big thanks to Mark "Mr. Chinook" for coming out and filming and providing much needed moral support.

Watch at YouTube

Please forgive the redneck ballast on the skids. Ballasted the model to weigh 45lbs which I think will be close to finished weight. Using 6000mAh packs and taking them to 75% capacity yielded 5 min flights, so I will need to get larger capacity packs. Head speed was 942rpm. Might be able to get it a tad lower, but it seemed relatively happy at that speed. Definitely needs more tuning, she flies like she is way tail heavy, but it is pretty nose heavy so not real sure what is going on there. But no weird noises, no really bad tendencies, so I am happy and now we can get on with detailing and finishing!

Steve

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10-13-2018 10:34 PM  59 days agoPost 26
bwellmaker

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Long Island

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CONGRATS!!!!

WOO-WOO!!!

Nicely done Mang,

That's a great feeling.

UIH,

B

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10-13-2018 10:46 PM  59 days agoPost 27
jbewley

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Fairfield, PA

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Very nice. Looking forward to seeing it up close.

Jim

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10-13-2018 11:39 PM  59 days agoPost 28
marc28

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new york

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Lookin good steve

East Coast scale helicopter Field Rep
Vario Team Pilot

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10-14-2018 02:01 AM  59 days agoPost 29
Grimracer

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Eau Claire WI

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how did the tail drive work? CONGRATS!

Grim

Michael J Zaborowski

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10-14-2018 04:54 PM  59 days agoPost 30
ssmith512

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Indianapolis, IN USA

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Thanks friends!

Mike, tail drive seemed to work very nicely. No weird sounds, it doesnt have that wha-wha-wha sound you normally hear from the cable winding up and unwinding, so I am pretty happy with it.

Did one quick test again this morning and lowered the head speed from 942 down to 822. Gained a full minute of flight time!! Still had good recovery power at that head speed. Might be able to get it down around 800rpm,....that would be pretty cool!

Just doesnt fly very well. Me and big heavy birds just dont seem to like each other. At IRCHA next year, I need to beg the Bavarian guys (JC Zankle) to spend some quality time with me and the Cobra and Airwolf and help me understand the tuning parameters and how to settle the heli's down, as I am admittedly kinda lost.

Steve

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10-15-2018 01:21 AM  58 days agoPost 31
Grimracer

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Eau Claire WI

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to me.. that is the most understood part of the scale arena. I have to have the guys from Futaba help me tune mine. I mean I get the basics but I am just not great at that.

Most want the machine to be all hot.. or just dont understand the flight style I need.

JC however GETS IT and gets it well.. Nick has been a great help to me as well.

When you get it close.. please let others know what you did to get the machine where you want it.

Grim

Michael J Zaborowski

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10-15-2018 04:46 AM  58 days agoPost 32
Adaboy

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Maricopa, AZ, USA

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Very nice! Good job looking forward to more.

Sounds like were cooking with gas....

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10-15-2018 02:54 PM  58 days agoPost 33
doorman

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Sherwood, Arkansas

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Looking Good.....
Steve, as usual, you are going to have a great looking/flying heli!!
No doubt you will get the stabi system under control.. just a note, the elevator always seems to be the most sensitive control.. don't forget that you can use expo on it...looking forward to seeing it up close next season..

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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10-15-2018 04:04 PM  58 days agoPost 34
ssmith512

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Indianapolis, IN USA

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doorman
Looking Good.....
Steve, as usual, you are going to have a great looking/flying heli!!
No doubt you will get the stabi system under control.. just a note, the elevator always seems to be the most sensitive control.. don't forget that you can use expo on it...looking forward to seeing it up close next season..

Stan
Thanks Stan!! Missed you at Dalton this year! Ya ,gotta play around with settings. We will get it figured out.

Steve

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11-03-2018 08:50 PM  38 days agoPost 35
ssmith512

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Indianapolis, IN USA

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Want some must see TV????

Time to start turning this bird into something that is nice to look at.

First up, the wicker bill on the vertical stab. Very simple, just 1mm fiberglass sheet hysoled in place....

Then on to finishing up the gun turret mounting. Designed and 3D printed a bushing holder inside the fuse..holds the brass pipe...

Trimmed the brass pivot axle on the turret...

And showing the mounting block for the gun system on the interior of the turret..

Then finished up the turret. The grey "wheel" is simply a 3D printed template I used to trace the cutout line....

3D printed a control arm for the turret. Here is a pic from the inside of the fuse showing the collar holding the turret axle in place with the control arm on top of the collar. All I need is to print a servo holder and hook everything up for a fully functional turret. I have some programmable servo controllers to animate the turret and gun barrels and will show all of that later...

And since Butch put wings on his S-67, I decided I wanted wings too!!! So I drank a bunch of Red Bull (Red Bull gives you wings you know..) and got to work. Of course just gluing the stub wings on to the fuse is way too easy...I decided I wanted the stub wings to be removable for various reasons. Went through several different ideas and settled on a pin-inside a tube-magnet system.

First thing to do was to locate the stub wings on the fuse. Did some preliminary panel line layout and 3D printed a template. This template was used to locate the center of the pins, tubes, and magnets on the wing and the fuse so everything lines up perfectly....

Here you can see the wing held up to the fuse. Notice the uneven gaps between the fuse and wing. Not acceptable. All the gaps are in the wing, fuse side is nice and flat. So to solve this and create a perfect "seam" between the wing and fuse, I cut out some 1mm fiberglass plate to glue onto the end of the wing.


Then 3D printed some magnet "cups". These cups hold and mount the magnets to the wing and fuse and are designed so the face of the magnet is flush with the surface of the fuse and surface of the wing....



Here we are gluing the pins in to the plate (plate will be glued onto the end of the wing)...again I 3D printed a template to not only locate the pins, but to keep the pins orthogonal to the plate while the hysol dries. This is so we dont have any alignment issues later on....

Pins glued in place and the plates are now ready to glue onto the end of wings.....

So I dump a bunch of hysol onto the wing and plate and let it ooze out all over the place to fill in the gaps and use the previously mounted magnets to hold everything in place while the hysol dries...

All dry and ready to trim and sand (plates were cut over sized to allow trimming at this stage)...

After some dremel work, and some elbow grease, we end up with a very nice "seam". Much better. Nothing more needed other than some high build primer.....



Now we have the proper Cobra "look"....

Tubes for the wing mounting system pins are being glued into the fuse now. Will show all of that in the next update. Wings are removable without the need for tools. I'm happy with the result so far.

Steve

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11-04-2018 11:47 AM  38 days agoPost 36
bwellmaker

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Long Island

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"All I can say is SHAM WOW"

Nicely done mang. Digging the magnet cups. How cool is that. Learn something new every day.

UIH,

B

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11-04-2018 01:56 PM  38 days agoPost 37
jbewley

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Fairfield, PA

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Very nicely done Steve. I used magnets for the weapons systems on both my Huey and the OH-58. They hold well and make transport very easy. I didn't think of pins and like that idea.

Jim

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11-09-2018 04:55 AM  33 days agoPost 38
chinooker

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Florence, KY

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Awesome work Steve!

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11-11-2018 02:26 PM  31 days agoPost 39
doorman

rrProfessor

Sherwood, Arkansas

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Great Job!!!
Steve, as usual, you are creating an amazing machine... also, the ideas on how to tackle different areas are what makes your creations stand out...
Love watching the glue dry too!!!!

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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11-11-2018 11:57 PM  30 days agoPost 40
ssmith512

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Indianapolis, IN USA

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Thanks friends!!

Small update....

Worked on the magnet holding system for the canopy.

For the front of the canopy, added a small styrene lip that slots into a gap cut into the fuse. This lip holds the canopy in position laterally and also keeps the front of the canopy from lifting up...

Then used the hadny dandy step drill to make the holes to accept the 5mm diameter magnets...

Using block magnets to hold the round magnets in place and flush with mating surface while the glue dries. 8 magnets total holding the canopy on..

Round magnets glued in place..

And canopy in place. Alignment of magnets came out nearly perfect....


Here is a close up of the pin-tube-magnet system for the winglets completed....

And then started on some body work. Under the canopy there are access hatches for the ammo stores and I think other storage. These hatches are cutout and hatch doors are provided loose as part of the kit from Heli-factory. However, the doors do not fit as well as I would like them. They stick out bit.....


Cant leave well enough alone, so we wrapped the doors with some non stick plastic wrap and got on with the bondo...

And after a little elbow grease, doors fit much nicer now. Just a little more detail filling and sanding work is all that is required now...

And finally dug in and really started trying to design and 3D print scale details. Started with this louver detail........

And after a few iterations and attempts, ended up with this. Pretty happy with it. A little primer filler and I think it will do nicely. Last pic shows that you can see through the vents (they are not solid - they are "functional" LOL!)


Steve

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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › AH-1W Super Cobra - Build Thread
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