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HelicopterScale Model RC Helicopters › Seahawk 600 tail drive problems
08-03-2011 07:07 AM  6 years agoPost 1
capesandblaster

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Truro, MA

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Long story short....
I built a RCA Seahawk based on Chaos 600 mechanics, 4 blade head and tail, 12s, CC HV80, Hyperion 4035/560, 12t pinion and 164t main. Govenor mode is set for 1400 headspeed with startup and speed changes at 1. I finished the heli and after a couple of hovers, the CC esc burst into flames and was replaced by CC (but thats besides the point). Once I got it back together, I was trimming out and after a few hovers, the cable collet spun on the cable. The cable was fine, but it spins freely inside the metal collet that inserts into the tail gearbox connector. RCA promptly replaced the cable and after
some headaches, I got the new one in. After 1 beautiful 10 minute flight with rock solid circuits and very good tail control, the same thing happened 1 minute into the second flight!! This time the cable spun in the collet attached to the mechanics side. I called RCA and they were going to weld up a better one. Called today and there is no ETA on the new cable(s) so I'm getting pretty frustrated! I love RCA's site and am planning on a Chaos 700 based scale project as soon as they are available, but this is the third cable on a handful of flights. I don't think it's a design issue because the cable is fine, it's just not soldering well to the collet. Attached is one of the collets and the 2 cable ends that came out clean from them. Anyone else having this problem. I'd talk to cliff about it, but I can never get thru to him.

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08-03-2011 08:10 AM  6 years agoPost 2
Mojave

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Palos Verdes, Ca. USA

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It doesn't look like it was even cleaned or soldered. If it were me I would thoroughly clean/sand the cable, apply a good flux and solder it where it inserts into the collet. After soldering the cable you can dremel a couple small flats on each side (this will act as a solder lock, like having a set screw).

Then, sand the inside of the collet, clean it, flux it and tin it also. Drill a small hole through the side of the collet, then slide the cable into the collet and solder it as a unit. The solder will flow into the holes and create a positive lock. You can remove any excess solder from the outside of the collet when you are done. I use Dr Tims contour drive and his has set screws in the collet. Hope this info helps.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-03-2011 01:25 PM  6 years agoPost 3
Hoverup

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Golden Gulf Coast - USA

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Silver solder is the best way to go here.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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08-03-2011 01:29 PM  6 years agoPost 4
rcmiket

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El Paso,Texas

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I thought that was addressed in the V2 version. that's why I waited to order till the second updated run. Now I'm wondering about mine holding up. Another issue I ran across is the springs are way to soft for a heli this size. I'm perching for replacements as we speak.
Mike

"When Inverted down is up and up is expensive"

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08-03-2011 01:31 PM  6 years agoPost 5
Hoverup

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Golden Gulf Coast - USA

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Your Seahawk "Stars and Bars" are inverted. Look at your Parkzone T-28 for correct application. Thought you would like to know.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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08-03-2011 02:58 PM  6 years agoPost 6
garyl

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taxachussetts

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If this was my heli I would drill a hole straight through the collect for two opposing set screws to secure that cable. Then go ahead and solder it as well.

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08-03-2011 03:07 PM  6 years agoPost 7
capesandblaster

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Truro, MA

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Your Seahawk "Stars and Bars" are inverted. Look at your Parkzone T-28 for correct application. Thought you would like to know.

Wow...I'm embarrased that a Parkzone "foamy" is more scale than my
Seahawk!!! Thanx!!

I'm going to dig out some of my silver solder and flux from my boating days and try and fix one of these. Unfortunately the teflon tubing may have kinked pulling these out, so it may be a moot point.
Does the higher heat from silver soldering a torch affect the steel hardening of the flex cable?
Thanx for the attachment tips!
Adam

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08-03-2011 03:32 PM  6 years agoPost 8
rcmiket

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El Paso,Texas

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Are your springs on your gear bottoming out?
Mike

"When Inverted down is up and up is expensive"

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08-03-2011 03:50 PM  6 years agoPost 9
coptercptn

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Mesa AZ. USA

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If you get the cable hot enough to do damage you are using way too much heat for soldering!.. and no, it will be just fine.. I have been flying my Cobra with the cable for 3 years and it is just fine. I do recommend (as others here have) that you drill /tap for set screws to "Lock" the cable in place... And, you mentioned "Boating days".. take a page from that book.. Dumas has the cable and sleeve stock (in Bulk so you can make your own lengths. (just sayin if you have trouble getting replacement cable.)

Home of the "Sea Cobra".....

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08-03-2011 04:51 PM  6 years agoPost 10
Mojave

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Palos Verdes, Ca. USA

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X2^^^ I use a butane pastry torch to solder my cable drives. It gives even heat over a larger area and you can induce less heat by just moving it further from the part that you are soldering. Keep a damp rag handy and right after you apply the solder to the cable, wrap the rag around it and wipe it. This will take the excess solder off and it will be very round after wiping. This way it slides right into the collet and will run true. I was going to suggest the set screw fix, like my contour drive, but I don't think there's enough meat in that coupler to tap it. As mentioned before, silver solder is the way to go. It should look like this when you are done soldering. That's my .02

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-03-2011 05:02 PM  6 years agoPost 11
GyroFreak

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Orlando Florida ...28N 81W

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Does the higher heat from silver soldering a torch affect the steel hardening of the flex cable?
After soldering, just don't quench it in water, let it cool in the air normally.
A quick wipe with a damp rag as suggested above is ok, just don't cool it fast.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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08-03-2011 06:02 PM  6 years agoPost 12
capesandblaster

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Truro, MA

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Awesome advice, thank you. I've gotta pick up some more s/s flux this week. And yes my springs do bottom out, I stretched them some to make them a little better, but I'm going to eventually look for new ones when I finally get this thing reliably in the air!!
P.S. you can see from the pics, my cables don't look like that!!
Adam

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08-03-2011 06:15 PM  6 years agoPost 13
Mojave

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Palos Verdes, Ca. USA

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Good advice. Yeah, I should have mentioned that. It's not a quench, it's just a quick wipe with a damp rag with room temp water, then let the cable cool to room temp. All it's for is to wipe the excess solder off the cable. You would be surprised just how hot that cable still is after the wipe. Ask me how I know
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-03-2011 07:10 PM  6 years agoPost 14
Hoverup

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Golden Gulf Coast - USA

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You should be able to get a couple replacement "Stars and Bars" from Callie Graphics and lay them right over the inverted ones. I worked with Callie to help get the various "Hawks" coming from RCAerodyne decorated. She has a fantastic rep. for quality and customer service. BTW she was not the one applying these. They may have been applied at the plant in China.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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08-05-2011 08:57 PM  6 years agoPost 15
rcmiket

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El Paso,Texas

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Mine were not applied from RCAreodyne. If you order the Seahawk

http://www.scaleflying.com/SH-60-Se...Size_p_795.html

You get the fuse the decals are separate. Just don't want anyone thinking these are painted and have the decals in place. I'm sure Callie can get the replacements for them. They do great work.
Mike

"When Inverted down is up and up is expensive"

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08-06-2011 11:55 AM  6 years agoPost 16
capesandblaster

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Truro, MA

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Mine were callie graphics also...When I said I was "embarrassed",
it was cuz I put them on!! I've got a couple extra decals, I'm
gonna make it right!!!
Adam

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08-06-2011 12:21 PM  6 years agoPost 17
rcmiket

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El Paso,Texas

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I need to get on mine and get it finished up. I got side tracked.
Mike

"When Inverted down is up and up is expensive"

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08-06-2011 03:57 PM  6 years agoPost 18
Hoverup

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Golden Gulf Coast - USA

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It's all good and it's a great looking heli.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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08-06-2011 10:04 PM  6 years agoPost 19
rcmiket

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El Paso,Texas

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Absolutely it sure is.
Mike

"When Inverted down is up and up is expensive"

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HelicopterScale Model RC Helicopters › Seahawk 600 tail drive problems
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