PlainSmart
Topic Author
Posts: 99
Joined: Wed May 25, 2005 12:29 am

Spark Plugs

Fri Jun 17, 2005 1:09 am

Anyone know the difference between massive vs. fine wire spark plugs? I know the fine wire will last commonly until TBO, but are there performance differences.
 
Buzz
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

RE: Spark Plugs

Fri Jun 17, 2005 11:07 am

Hi PlainSmart, Buzz here. Well, the fine wire plugs tend to foul less: i'm thinking of 65-100 hp engines on an Aeronca Champ that were made to run on 80 octane avgas... 100LL has 4 times more TEL than what is required.
I didn't see much of a difference on that airplane, we had some fine wire plugs and decided to try 'em.
Normally we see a little bit of "junk" (combustion deposits) deep down in the sparkplugs. But it doesn't cause enough fouling to make a bad mag drop during run -up.
We use massive electrode plugs on the DC-3 i play with, they're about 1/3rd the price of fine wire plugs. It makes a difference when you need 28 sparkplugs per engine.
g'nite
Buzz Fuselsausage: Line Mechanic by night, DC-3 Crew Chief by choice, taildragger pilot for fun
 
PlainSmart
Topic Author
Posts: 99
Joined: Wed May 25, 2005 12:29 am

RE: Spark Plugs

Sat Jun 18, 2005 5:28 am

Buzz
Thanks for the insight. Good call on the price especially when 28 plugs a side. I had heard about the less fouling idea also.

Who is online

Users browsing this forum: WholaLottaLove and 1 guest

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos