Push/Pull Rod Seals

[toppack]

David,
I recieved the 1/16" rod seals. Thanks,
I assume they have one-way V-cup type seals, correct?
If so, is there a way to determine the proper direction of installation, or do I need to do some kind of test to determine which way they are facing? I didn't see a direction marked on them?

[He Who Shall Not Be Named]

David,
I recieved the 1/16" rod seals. Thanks,
I assume they have one-way V-cup type seals, correct?
If so, is there a way to determine the proper direction of installation, or do I need to do some kind of test to determine which way they are facing? I didn't see a direction marked on them?

Nope. An encapsulated dumb old O-ring or quad-seal ... depending what I have in the bin at the time of manufacture. Point it either way you wish (two choices, unless you totally screw up the installation).

David,

[toppack]

Okay, Great!
I can't think of a 3rd option, so this should be easy. :D

[toppack]

No problems! :)
I used a little RTV to seal them in the holes I drilled in end cap of bow WTC.
I figured that would be easier to press out, if I ever needed to replace any.

[He Who Shall Not Be Named]

No problems! :)
I used a little RTV to seal them in the holes I drilled in end cap of bow WTC.
I figured that would be easier to press out, if I ever needed to replace any.

That's how I do it.

David,

[redboat219]

what are all those nuts and screws on the endcap for:confused:

[He Who Shall Not Be Named]

what are all those nuts and screws on the endcap for:confused:

Electrical contact lugs for the FS-1 propulsion/control system.

David

[toppack]

Wow, I didn't realize it had 4 motors. :eek: (Somehow I got the idea there were 2)
Very interesting system. I'll drink to THAT!
I bet it takes a little practice to learn to control it accurately?
That system needs Fly-by-Wire Computer control! :D LOL :D

[He Who Shall Not Be Named]

Wow, I didn't realize it had 4 motors. :eek: (Somehow I got the idea there were 2)
Very interesting system. I'll drink to THAT!
I bet it takes a little practice to learn to control it accurately?
That system needs Fly-by-Wire Computer control! :D LOL :D

Nope, easy as pie; I configured it to drive like a tracked vehicle (tank). Very stable, easy to turn on a dime at a stand-still, but takes forever to turn once some way is on. I'm re-configuring it for banking/coordinated turns.

David,

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I really like the use of the Mixer circuit to control 2 ESCs and 4 motors, and a separate WTC for each motor makes the system much more versital, allowing it to be put in other hull shapes if wanted. :)

Are you adding more control surfaces, like alirons, on a servo, to get the roll-control?

[redboat219]

Minimizing lateral pushrod movement

On the topic of pushrod seals. What's the best way of minimizing lateral flexing of the pushrods during servo operation so as to prevent possible deformation of the seal thereby causing a loss in seal integrity?

[He Who Shall Not Be Named]

On the topic of pushrod seals. What's the best way of minimizing lateral flexing of the pushrods during servo operation so as to prevent possible deformation of the seal thereby causing a loss in seal integrity?

Make the internal portion of the pushrod long so as to minimize the transverse displacement from center. going to the smaller 1/16" push rods has done much to reduce friction as the more flexible pushrod will run through the seal and seal bearing surface easier.

David,

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When the rods are long, I install a small bulkhead, about half way of the rod length, with holes just large enough to accept rod-ends, and put the rods through for bracing, so they can't flex much.
The bulkhead can be made from plastic-sheet or whatever material matches the models construction.

[redboat219]

Instead of the usual round hole I was thinking of cutting a oval shape hole on the servo control horn by removing material between two adjacent hole so that the pushrod arm can slide freely minimizing lateral flexing.

[toppack]

That will cause a jerky movement of the control-surface, when it slips thru slot, but it will be slight.

I first thought you were talking about Outside the SD, but I see now that you mean inside the SD.
There are some pictures of a simple linkage hookup to fix that, on this forum, if I can find them I'll copy them here. I could never explain it with just text.