| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 305.7 | Cordless drill for starter? | SNOC01::BROWNTONY | Tony Brown Sydney, Australia | Sun Jan 29 1989 22:33 | 11 |
| For what it's worth, I thought I would test the cordless drill
approach. I machined a metal cup the same size as my Sullivan and
turned a 10 mm shaft on the other end. Then I borrowed my brother's
Makita 7.2 v cordless drill and went at it on my OS FS120.Turned
1 3/4 turns very well until it reached the point of compression.
And then........it stalled! No amount of recharging, swearing, change
in technique etc would get it past compression. Seemed like a good
idea at the time.................
Tony
|
| 305.8 | Quite different | LEDS::COHEN | | Mon Jan 30 1989 12:47 | 7 |
|
There's much more torque and power in a handheld starter. Rmember, the
Cordless drills have the equivalent of an 05/075 sized electric airplane
motor, geared down from 12-13K RPM to about 600 RPM. Hand starters have
a motor that's as large, or larger than a 60 sized Cobalt motor, and
they're not geared down. I'de guess that the diameter of the armatures
differs by as much as 2 inches.
|
| 305.12 | More test details | SNOC01::BROWNTONY | Tony Brown Sydney, Australia | Mon Jan 30 1989 23:50 | 12 |
| The cordless drill I used was a large two speed drill, not a cordless
screwdriver. The Sullivan deluxe (12v) I have was SUBSTANTIALLY superior
in torque terms.
I have seen cordless drills with the following voltage ratings: 9.6v,
7.2v, and 4.8v (those numbers sound familiar?) which I assume give
some indication of the relative torque ratings. My experience was
trying to start a 120 four stroke with a 7.2v drill. "Your mileage
may vary".
Tony
|
| 305.13 | Starter 1 Drill 0 | LEDS::WATT | | Tue Jan 31 1989 17:42 | 8 |
| To start a big motor like a 1.2 with a starter, the trick is to
turn it backward until it hits compression and then use the starter.
This gets things moving and the inertia will get it through compression
if it doesn't kick back too hard. You need the RPM's of a good
starter to get a 1.2 through compression and you need the head start
of the one turn before compression. (4-stroke) A slow turning drill
will not get the inertial help through compression and it won't
turn fast enough to prevent back kicking. Ouch!
|
| 305.14 | Use a decent battery | CURIE::ANKER | Anker Berg-Sonne | Wed Feb 01 1989 08:01 | 18 |
| Re:< Note 305.13 by LEDS::WATT >
The problem is usually caused by attaching a wimpy little
motorcycle battery to the starter. I use a regular automotive
battery and it's amazing how much more power you get out of a
regular Sullivan starter. I have yet to run into an engine my
starter won't turn over.
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Hang in there! o_|_
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Anker \_|_/
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