Here are some more steps:
How to make good servo mount was quite a difficult task as the space
is very limited and CG must be right. Doublesided tape was the easiest
way but later we came on this idea. These 3 pics tell everthing: |
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| Servo stays rock solid in place. For installing you need fit and
trained fingers tough, but the installing didn't took more than
5 minutes. Servo arm was cutted out from extra wheel that came with
the servo, pushrod is made out of 1 mm brass wire, red tube is from
WD40 spray tube and two silicone tubes of different diameters get
it in placed well sealed. On the first run some water came in when
the boat didn't selfright. I added later grease, this provided good
seal. |
| Water cooling is made out of 3 mm al tube 5 min epoxied into place.
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| If we could done the installing of the cooling again it would
be on the other side. So the outlet would be then on the right side
of the step. That's the price for building in such a hurry! |
Flex drive:
1.2 mm piano wire (or any good quality, uncoroded, round (! steel
wire), teflon (PTFE) liner from http://www.bohlender.de with 1.5
mm hole http://www.bohlender.de/e/produkte/S1810.htm , two brass
tubes with 1 mm hole, carefully drilled to 1.2 mm and brass part
with M4 thread - can be a turned on a lathe from a brass flathead
screw. Bearing is from teflon with drilled hole for grease. Brass
parts should have nice tight fit and glued with Loctite 603 on the
1.2 mm wire. File down the brass part which comes into the coupler
so the screw gets better bite. |
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| BTW, short notice here: After the run pull out the drive and wash
it with WD40 and store it this way. If you leave it in the boat
there is a good possibility the wire will rust. If you run the boat
in Žaggressiveâ water the wire can get corroded in a day! Corrosion
doesn't only mean more drag but the wire can snap easily. |
| With installed drive: |
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