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Jul 09, 2019, 05:58 PM
San Diego California
Thread OP

Walbro fuel pump for water pump FPC-1 Vs K-10

FPC-1 is consisted of aluminum sheets and metal springs while K-10 has all plastic & rubber parts.
I think K-10 is more suitable for RC gas engine cooling pump for its anti corrosion ability.
Last edited by Old NEET; Jul 13, 2019 at 07:14 AM.
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Jul 18, 2019, 11:29 AM
San Diego California
Thread OP

Rescue boat in action ( for my F-41)

The idling set was too low and probably needed more warming up. Anyway, the motor stopped at middle of the pond and rescued.

RC rescue boat in action (3 min 4 sec)
Jul 18, 2019, 12:41 PM
San Diego California
Thread OP

Running good

As mentioned previously, the requirement of a water pump is not critical as long as the boat is not left idling for long since movement of the boat should flow sufficient water at modest speeds. Besides this, I found the water flow is not proportional to the engine rev. The pulse drives the diaphragm has certain frequency range for its effectiveness. Again, it is not critical but I simply think higher rpm needs more cooling water flow.

F 41 third run (2 min 7 sec)
Last edited by Old NEET; Jul 19, 2019 at 06:55 AM.
Jul 24, 2019, 05:56 AM
San Diego California
Thread OP

Engine mount

Replaced the separate steel plate engine mount to aluminum ladder frame type and through strut bolts. This is a compromising result of strength and vibration dumping after anti-vibration rubber stud was broken.
Last edited by Old NEET; Jul 24, 2019 at 10:43 AM.
Aug 07, 2019, 06:19 AM
San Diego California
Thread OP

Prop rpm by sound

Actually this is bad video (focus ring moved when I wore it ) but I can hear the engine sound of prop goes above and under surface when it was going over the bumps.
RC Boatworks Stryker F-41 engine sound check (2 min 47 sec)
Last edited by Old NEET; Aug 07, 2019 at 06:43 AM.

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