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--- searchwing-waterproofing [2019/01/14 15:56]
kingbbq [Waterproof the Servos]
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-====== Making the plane waterproof for landing in the water ======
-===== Finding the right glue =====
-I tried 3 different glues.
-The model we use (mini talon) is made with "EPU" expandend [[https://en.wikipedia.org/wiki/Polyurethane|PU]].
-I tried:
-* UHU POR - special glue for Styropor and similar foams.
-* UHU Plus - 5 min two component epoxy
-* Hot Glue (Patex)
-The results:
-====== UHU Plus ======
-Is not compatible with PU. Its neither waterproof, nor does it keep the parts together.
-{{::uhu_plus_water.jpg?400|}}
-====== UHU Por ======
-works well. good fixture and waterproof:
-{{:glue_uhu_por_vs_uhu_plus.jpg?400|}}
-But - the glue has to be applied in the right way! It has to be thin and completely dry before putting the parts together:
-{{:right_glue_technique_2.jpg?400|}}
-Bust is to spread it equally with a (gloved) finger:
-{{:right_glue_technique.jpg?400|}}
-====== Hot Glue ======
-Hot glue also showed very good results, both for fixure and for waterproofing.
-{{:hotglue.jpg?400|}}
-====== Closing holes ======
-The so glued model had some holes to fill / close.
-I used thin plexi-glas. Best way to glue them was hot glue, as it can also fill little holes or 	irregularities in thickness.
-{{:waterproof_camera.jpg?400|}}
-I used the same technique also on other parts.
-======== Waterproofing the servos ====
-there are 2 interesting articles on Instructables on this topic:
-https://www.instructables.com/id/Water-proofing-a-Servo/
-https://www.instructables.com/id/Waterproof-your-servo-motors/ (if you want to follow this one, dont forget the glitter on your finger nails)
-. Make the housing waterproof
-- I used "Curil", a standard sealing compound.
-- Open the servo and put the sealant an all touching surfaces
-- also put sealant to the cable, where it leads through the housing
-{{:servo_sealant.jpg?400|}}
-. Insert a O-Ring under the horn
-- remove the horn
-- add a 1mm thick o-ring
-- add some lubrication. I used "CRC Multilube" - attention - lubrication has to be compatible with the rubber of the sealant. Don't use silicon rings with silicon lubricant.
-- screw the horn back on
-{{:servo_oring.jpg?400|}}
-====== Test it... ======
-- submerge in water while it moves
-- no bubbles should emerge