Nomenclature musings

11 posts / 0 new
Last post
deising's picture
deising
Offline
Joined: 11/3/08
Posts: 1351
Nomenclature musings

On a VERY rainy, stormy day, I will stay indoors at lunch time and ask two questions:

1. Why do we still call it the 'ignition switch' when there is no spark ignition on our diesel engines?

2. Why do we call it a 'throttle' when diesel engines do not adjust power by throttling the airflow? [They always pump the same amount of air for a given speed but simply add more or less fuel.]

—

Duane Ising - Past Commodore (2011-2012)
s/v Diva Di
1999 Catalina 36 Hull #1777
Std rig; wing keel, M35B, Delta (45#)
Punta Gorda, FL
http://www.sailblogs.com/member/diva-di/

Steve Frost's picture
Steve Frost
Offline
Joined: 12/14/07
Posts: 788

I move henceforth that we refer to the engine panel key switch as the "Engine Master Switch / EMS".

In addition I move that we refer the the control on the right side of the pedistal as the "Power lever / PL" or Engine Condition Lever / ECL.

I also resolve that it should stop raining in Florida so Duane can get outside and get his mnd off these things.

—

Cepheus dream
C36 MK I # 825
MK I Tech Editor No Mas

SailorJackson's picture
SailorJackson
Offline
Joined: 2/9/11
Posts: 152

In reference to the key switch. There exists an ignition inside the cylinders. That ignition will never get started unless you turn the key. I don't think of it as an ignition switch, but I don't have a problem with people who do. In contrast to a gas engine, there's not much difference. With an old style spark ignition, the opening of the contact inside the distributor the induction of the coil creates a spark. The real ignition switching is what occurs inside the distributor, not at the dashboard. It's no more of an ignition switch than the key switch on the diesel.

Likewise a throttle [URL="http://www.thefreedictionary.com/throttle"]definition on the web[/URL] indicates that "to throttle" is to regulate the flow of fuel. If we were all 100% literal in our conversation, discussions would get extremely difficult. There will always be a vast amount of implications and assumptions in any discussion, with the possible exception of legal documents. We know they're no fun to read.

GTJ

—

Greg Jackson
SV Jacqui Marie
2004 C36, MKII
tall rig, wing keel,

deising's picture
deising
Offline
Joined: 11/3/08
Posts: 1351

Greg, you are completely right that being 'too literal' makes for confusion amongst the masses. My musing was a bit tongue-in-cheek. ;)

As you point out, in a spark-ignition engine, you are energizing a circuit that allows the ignition coil to function. In our particular boats (at least my 1999 model), if I don't energize that circuit, I don't get the electric fuel pump to run, nor the glow-plugs on those rare occasions I need them.

As Steve proposed, it is like a Master Circuit that needs to be energized for the rest 'of the stuff' to work.

Water is now 6 inches over the dock, and I am still stuck at work (on break).

—

Duane Ising - Past Commodore (2011-2012)
s/v Diva Di
1999 Catalina 36 Hull #1777
Std rig; wing keel, M35B, Delta (45#)
Punta Gorda, FL
http://www.sailblogs.com/member/diva-di/

Maine Sail
Offline
Joined: 2/26/10
Posts: 324

Here's the one that really drives me crazy.....

RPM = Correct way

RPM's = Is just wrong

YES - The engine turns 1000 revolutions per [B]minute[/B]

NOT - The engine turns 1000 revolutions per minute[B]s[/B]

—

-Maine Sail
https://www.marinehowto.com/

 

benethridge's picture
benethridge
Offline
Joined: 5/13/09
Posts: 446

Here I sit also...bored and drinking... waiting for Andrea to move on and this lightning storm with her so that (ironically) I can finish my lightning protection system. So I muse on my landlubber sister's question of last week:

Why doesn't a sheet look like a sheet?

I slit a sheet;
A sheet I slit
And on my slitted sheet
I sit.

Another sip....and once again...

I slit a sheet;
A sleet I slip
And on my sitted sleet
I sip.

Another sip...

—

Ben Ethridge
Miami, FL
1984 MK1 Hull# 263

Steve Frost's picture
Steve Frost
Offline
Joined: 12/14/07
Posts: 788

You always hear about animals getting goofy during weather changes. It obviously affects land locked sailors as well. Must be a big storm.

—

Cepheus dream
C36 MK I # 825
MK I Tech Editor No Mas

BudStreet
Offline
Joined: 9/4/09
Posts: 1127

Here's another one, 6 Nautical Miles Per Hour, or, 6 Knots per Hour. Wrong.
6 Knots. Right.

Also, we don't, with the Mk IIs and a full tank of fuel, actually need any electrics for the engine to run since they will gravity feed quite nicely, speaking from experience of spending a full summer on a dead fuel pump and not knowing it. If one knew how to crank start a Model T, I'm pretty sure one could so start our little diesels with no help from the "Engine Master Switch" at all.

deising's picture
deising
Offline
Joined: 11/3/08
Posts: 1351

I always wonder about the 'snatch block.' Sounds like a contraceptive device to me.

—

Duane Ising - Past Commodore (2011-2012)
s/v Diva Di
1999 Catalina 36 Hull #1777
Std rig; wing keel, M35B, Delta (45#)
Punta Gorda, FL
http://www.sailblogs.com/member/diva-di/

plaineolde's picture
plaineolde
Offline
Joined: 11/4/08
Posts: 753

I dunno Bud; my first boat (old Watkins 27) had an 8hp Yanmar diesel with a hand crank. You'd hold the compression release, turn the crank until it was spinning as fast is you could go, and let go of the compression release. I was NEVER able to get that thing to start. As soon as I let go of the compression release, 'doink!!!' it would stop turning instantly. Maybe a silver back gorilla could start it but I sure couldn't (and I was much younger then). Probably much more compression in that one cylinder diesel than a Model T had.

My uncle had a name for any device, part or assembly that he couldn't identify. He just called it a 'frotus'. Like "What's that frotus for?" or "Hand me that little round frotus". I always know what he's referring to, even if I don't know what it is. It gets a funny look from guests when they point to something and say "what's that?" and I reply, "ah, it's just a frotus".:p

—

Gary and Cathy Price
1997 C36 Mk II Tall Rig/Wing Keel Imagine...
Hull # 1617
Worton Creek, Md.
Northern Chesapeake Bay

Capt. Sam's picture
Capt. Sam
Offline
Joined: 2/22/10
Posts: 322

OK, I sat out Andrea too, aboard. Duane wins!! with "Snatch Block", that one made me roll.

—

Capt. Sam Murphy
1994 Catalina 36, Hull 1327
Shoal draft, two cabin model.
Panama City, Florida

Log in or register to post comments