Saturday, January 30, 2016

Re: [Electric Boats] Re: conversion performance

 

HI Gang,


In 2014 I too converted from an Atomic 4 gas engine to an Electroprop E-7.  As my boat is a baby sister of Bob's being 4 ft shorter and 2000 lbs lighter with a similar set up, I thought my trial numbers might be a helpful comparison.  Note -  I have a 12 inch two blade feathering Max Prop set with a 10 inch pitch as I still race competitively.  

Totally happy with my conversion and will never go back to the dark side. 

Electroprop E-7

Owner:

Jamie Storey
Shediac, NB Canada

Boat Name:

Chiquita

FIN Keel

Propeller:

PYI  Max 2 blade feathering adjustable

Make & Model :

1977 C&C 29 Mk I

Pitch:

10 inches

24 degrees

Displacment

7,600 lbs

Shaft Seal:

New PYI Dripless

LWL

23.58 ft

Controller:

Sevcon 4

LOA

29.6 ft

Throttle:

OEM Controls Dial

Batteries:

4 x 215 amp Odyssey PC1800 FT

Volts:

48

 

 

2014            Average -  Based on Last Four Trials after motor and dripless seal worked in

Flat Water

Throttle

Setting

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Amp draw

2.5

6.5

12.5

19.3

31.3

45.5

70.7

Knots

1.6

2.0

2.6

3.3

3.9

4.4

5.0

RPM

602

837

1061

1266

1500

1720

2003

voltage

(estimated)

51.3

51.1

50.9

50.6

50.4

50.1

49.2

Power

(Kw)

0.13

0.33

0.64

0.98

1.58

2.28

3.48

Notes -  1.  Slight vibration of prop at 4.5 throttle   --    prop is offset to port

                 2.  RPM's  oscillate slightly after 3.5 throttle so we took average

 


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Posted by: Avalon@nbnet.nb.ca
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