Wow!
-------- Original message --------
From: "Bob Moriarty moriartybob@yahoo.com [electricboats]" <electricboats@yahoogroups.com>
Date: 1/30/2016 8:06 PM (GMT-06:00)
To: electricboats@yahoogroups.com
Subject: [Electric Boats] Re: conversion performance
Finally got some performance data today.
Velocity values are over ground (GPS), not through the water.
The first set was taken going into a < 4 knot headwind and an estimated ~0.1 knot current.
The second set was taken on a reciprocal course with an estimated tail wind of 4 knots.
Outdoor temperature was around 65F, 18C.
The boat's bottom was cleaned ~3 weeks ago. There is not a lot of bottom growth this time of year.
There's a bit of imprecision in my measurements in that this was my second sea trial and I'm still getting to know my new instruments. Also, some of the values took awhile to "settle down" and I probably could have been a bit more patient.
It would be nice to be able to gather performance data in an automated way.
Knots Amps Volts Watts
1.6 10 51.9 519
2.4 18 51.9 934
3.1 28 50.8 1422
3.7 43 49.8 2141
4.4 65 49.8 3237
5.0 92 48.8 4490 (full throttle)
Return course:
1.8 7 51.1 358
2.5 12 51.1 613
3.2 17 50.9 865
3.4 21 50.9 1069
3.7 30 50.9 1527
4.3 45 49.8 2241
5.2 89 48.8 4325 (full throttle)
Ox 1976 C&C 33
LOA: 32.87' / 10.02m
LWL: 26.42' / 8.05m
Displacement: 9800 lbs./ 4445 kgs.
Propulsion System: Electroprop Racer
Batteries: 4 X Northstar 210 FT Blue+
LOA: 32.87' / 10.02m
LWL: 26.42' / 8.05m
Displacement: 9800 lbs./ 4445 kgs.
Propulsion System: Electroprop Racer
Batteries: 4 X Northstar 210 FT Blue+
Motor: Motenergy ME 1114 Rev A
Controller: Sevcon Gen 4 275 Amp
Current Prop: 2-blade fixed 16X10X1
(original - came w/A4)
Jax, FL USA
Current Prop: 2-blade fixed 16X10X1
(original - came w/A4)
Jax, FL USA
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Posted by: tkgc9 <tkgc9@yahoo.com>
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