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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › AH-1W Super Cobra - Build Thread
07-15-2018 02:13 AM  3 years ago
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ssmith512

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Indianapolis, IN USA

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AH-1W Super Cobra - Build Thread
Well, after the demise of my beloved Roban Cobra last year, and since the AH-1W is my favorite full size heli of all time, I decided that I HAVE to have a Cobra in my hanger.

So, late last year I placed an order for a Heli-factory Super Cobra through their North American dealer, Eastern Helicopters. It finally arrived Thursday!! So this will be my build thread.

Fuse is 1/6th scale, roughly 7-1/2 feet long. Mechanics are Heli-factory with cable tail drive.

I will be diving into the world of 3D design and printing to assist with details on this build (should be fun!)

So enough talky, time for pictures!!

Subject heli - flew sorties in Afghanistan.....

Raw fuse as delivered......


Fuse comes with woodwork and cable drive installed.....

Mechanics are HEAVY DUTY!!! Steel pinion and main gear....


M-copter tail box. REALLY nice piece!!!


Initial progress might be a tad slow but am really looking forward this build. I am anxious to apply all of the things I have learned about scale modeling since the Airwolf build. Stay tuned for the periodic update!
Steve
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07-15-2018 03:05 AM  3 years ago
Heli143

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Phenix City, Alabama

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OMG!!!
That is absolutely awesome! Thanks for sharing!

Subscribed
Roy Mayoral
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07-15-2018 03:25 AM  3 years ago
senzafine

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Denver, Co

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Very nice! Looking forward to seeing it come to life.Steve
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07-15-2018 03:30 AM  3 years ago
eeeeky

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Vernal UT USA

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Keep em coming, that thing is NAUGHTYLets Fly!
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07-15-2018 03:46 AM  3 years ago
eeeeky

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Vernal UT USA

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Did you have to contact the distributor to get this? I cant see it on their site?Lets Fly!
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07-15-2018 12:11 PM  3 years ago
ssmith512

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Indianapolis, IN USA

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eeeeky Did you have to contact the distributor to get this? I cant see it on their site?
Everything is listed on Heli-factory.com (the manufacturer). I contacted them and they put me in touch with Eastern Helicopters (North American dealer for Heli-factory).

Hope that answered your question.
Steve
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07-15-2018 01:44 PM  3 years ago
doorman

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Sherwood, Arkansas

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Beautiful Machine!!
That is a great project Steve.. the subject heli will make an awesome model.. I know you will be making it a "show stopper" and looking forward to watching your project take shape.

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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07-15-2018 05:17 PM  3 years ago
bwellmaker

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Long Island

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SWEET!!!

Will enjoy watching this come together.

UIH,

B
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07-15-2018 08:01 PM  3 years ago
FenderBean

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Huntsville Alabama

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man love that size, put this one on my list lolhttps://www.youtube.com/channel/UCE_rywpdgBAxA8bHVCw3VQQ
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07-15-2018 09:21 PM  3 years ago
seaharrierman

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Gosport UK

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If this is as good as your Airwolf steve will be an amazing model

Do you know what’s happened with scalerchelis forum

Glen
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07-16-2018 02:32 AM  3 years ago
eeeeky

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Vernal UT USA

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Ive been looking on the site, looks like there are two options for the electric cobra. Is this the electric, or the electric 2? Looks like they sell another manufacturers fuselage as well thats bigger still.. Holy CRAP!Lets Fly!
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07-23-2018 01:08 AM  3 years ago
ssmith512

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Indianapolis, IN USA

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Work has commenced on the Cobra.

Installed some mounting blocks. What mounts to them will be addressed in a future post.

Cyclic servos mounted and cables routed.....

And fabbed up this most awesome "avionics plate". Items you are unable to identify will be identified in a future post - you'll just have to wait




Working on battery mounting options/ideas. Been trying to figure out a way to keep from having to remove the canopy and cockpit to access the batteries, but it doesnt look like that idea will work. Oh well, will just have to make the cockpit and canopy removal system quick and easy.

Will be awhile before I update again. Next weekend is the US Nationals and then IRCHA immediately after that, so I will be busy competing, chilling, flying and flying some more for the next couple of weeks.
Steve
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07-23-2018 01:55 AM  3 years ago
Grimracer

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Eau Claire WI

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hubba hubba.. dude.. super looking work!

Grim
Michael J Zaborowski
Futaba USA
AMA 124909
IRCHA 5453
Find me on MEWE
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09-16-2018 06:37 PM  3 years ago
ssmith512

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OK. Now that the funfly season is over for me, it's time to get this party started. Moving forward with getting the bird in the air ASAP before the detailing fun starts.

Axon is installed and programmed. Using turnbuckles on the swash links makes setup a snap....

Tail servo is mounted in the vertical fin...

And pushrod fabbed - carbon tube with steel rod inserts..

And then got busy with the 3D printer.

Started with a simple mount for the motor cooling fan. The Hacker motor is a normally used in airplanes with prop wash cooling it and I decided it might be prudent to have a fan mounted in front to blow some cooling air through the motor. So I ordered up a 50V 92mm fan. Fan is powered from the input side of the ESC (active when the main flight batteries are plugged in). So here is what I came up, printed in PETG....

Showing mechanics in fuse without the fan mounted....

And with the fan set in place....

Next up was to create some sort of grease "sling shield". Mechanics have all metal gears and I have decided that I want to lube them with grease. But obviously any grease (even those made specifically for gear drives), will sling off at speed. I didnt want grease being slung everywhere and making a mess or getting into things it shouldnt. So here is what I came up with (again printed in PETG)....

Mechanics with exposed gears....

"Gearbox" parts....

Test fit on the mechanics. I think this is going to work perfectly....


And got the Kontronik Kosmik Cool programmed with the Futaba TelMe sensor. The TelMe gives me ESC/motor/battery telemetry readings.......

Watch at YouTube

The gears are quite loud as you can tell in the video. Dont know if grease or run-in time will quiet them down or not. Hopefully. Might have to install some sound deadening in the fuse.

Hopefully wont be too much longer before we get some air under the skids!
Steve
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09-16-2018 07:52 PM  3 years ago
JuanRodriguez

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The Villages, Florida

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Everything looks great !

I’m by no means an expert but that noise sounds like something is out of round .....
Been there, done that and old enough to know better.....
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09-16-2018 08:19 PM  3 years ago
bwellmaker

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Long Island

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UIH,

Sweet Mang. This is going to be a nice machine.

I like the slinger cover. Nicely done.

B
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09-17-2018 07:30 PM  3 years ago
ssmith512

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Indianapolis, IN USA

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Anyone have any experience with the Jeti Main Power Switch? (I feel I need to install a Jeti product some how some way in order to get back some street cred - since I am a dying breed being a Futaba user and nobody loves me anymore :laugh: :laugh: )

http://www.jetimodel.com/en/katalog...ain-Switch-200/

I am intrigued by this product and think it may have a place in the Cobra. Any info you can offer is appreciated.

Thanks.
Steve
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09-18-2018 01:59 AM  3 years ago
FenderBean

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Huntsville Alabama

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On the Jeti switch, it’s cool
if you have a Jeti radio you can turn your receiver off from the radio. I have never built anything of this size but I’m sure it’s not cheap so don’t rest your heli on plastic servo arms, I have had them break. They get brittle with time.
https://www.youtube.com/channel/UCE_rywpdgBAxA8bHVCw3VQQ
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09-20-2018 05:14 PM  3 years ago
chinooker

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Florence, KY

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Great work so far Steve. Will follow this to the end. Can't wait to see all the details and see it flying.
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09-29-2018 09:16 PM  3 years ago
ssmith512

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Indianapolis, IN USA

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Is it update time?

Well, in case it is, here is some visual poetry for your viewing pleasure.......

Since this heli is electric, needed a "battery tray". So I drew up some shapes in Fusion 360, sent off the DXF files to Santa Claus and he delivered....

Elve's are still on vacation so some assembly required......











Fired up the 3D printer again and designed a bracket to hold the DB9 connector. This one connector carries everything so removing the mechanics is easy as this is the only connection between the mechanics and the avionics plate (less the 3 main motor leads)...


And while the 3D printer was still warm, I designed and printed this little puppy as a proof of concept prototype. I'll let you guys debate on what it might end up being.......


Watch at YouTube

And finally a pic of my redneck-shadetree method of glueing the pivot tube to the gun turret and making sure it is orthogonal to the turret on two planes (the carbon plate is just being used as a flat surface to increase the top of the turret area for the squares to sit on.....
Steve
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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › AH-1W Super Cobra - Build Thread
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