11-20-2013, 12:40 AM
MD:
[quote MasterDaad]Prop reamers are something I have
PON: I made a quick change prop adapter from a 1.25" diameter hole saw by cutting 2 slots out and removing the cutting teeth. A snug rubber stopper is placed on the 1/4" hole saw drill bit behind the prop to shove it into the slots. The stopper comes off quickly without leaving any marks after testing
Yeah, longer usually is better for props. It's good to know you've gone clear up to 12".
PON: I've tested up to 16" with geared motors and props of different brands, but 13X4 may be the limit on direct drives, plus the draft issues.
My current test plan is to go down to a Provo Harbor on a calm day and run tests inside the harbor where there should be very minimal current effects.
And I'll be testing using a single 3S 5.5Ahr Lithium which will be recharged after each test.
PON: I use 24v cordless drill lithiums like the $65 good price 4Ah Toro from Amazon running through a PWM.
A Watt meter will keep track of both Voltage and current so I should be able to control for changes in the input voltage as I test different props.
PON: I don't know if the same watts driving off a high voltage are equivalent to those of a low voltage with the same motor. On some projects I use 24v to drive 12v motors, but it won't be that much in your case, maybe 12.8v down to maybe 11v....
Thanks again[/quote]
Sure, this area is just one of my hobbies.
Pon.
[signature]
[quote MasterDaad]Prop reamers are something I have
PON: I made a quick change prop adapter from a 1.25" diameter hole saw by cutting 2 slots out and removing the cutting teeth. A snug rubber stopper is placed on the 1/4" hole saw drill bit behind the prop to shove it into the slots. The stopper comes off quickly without leaving any marks after testing
Yeah, longer usually is better for props. It's good to know you've gone clear up to 12".
PON: I've tested up to 16" with geared motors and props of different brands, but 13X4 may be the limit on direct drives, plus the draft issues.
My current test plan is to go down to a Provo Harbor on a calm day and run tests inside the harbor where there should be very minimal current effects.
And I'll be testing using a single 3S 5.5Ahr Lithium which will be recharged after each test.
PON: I use 24v cordless drill lithiums like the $65 good price 4Ah Toro from Amazon running through a PWM.
A Watt meter will keep track of both Voltage and current so I should be able to control for changes in the input voltage as I test different props.
PON: I don't know if the same watts driving off a high voltage are equivalent to those of a low voltage with the same motor. On some projects I use 24v to drive 12v motors, but it won't be that much in your case, maybe 12.8v down to maybe 11v....
Thanks again[/quote]
Sure, this area is just one of my hobbies.
Pon.
[signature]