DCDI stupid question

[sain]

Im probably showing my newbism here, but can anybody tell me what DCDI stand s for? As in Rotax 582 DCDI?

 

 

[Admin]

Just a guess but is it possible to stand for "Dual Carby, Dual Ignition" - as I said just a guess :)

 

 

[slartibartfast]

I'm guessing Dual Condensor Discharge Ignition

 

 

[Guest ozzie]

I belive dual carb dual ign. if it were the other it would be dual capacitor disharge ign not condensor. confirm anyone.

 

ozzie

 

 

[slartibartfast]

Oops - that's what I meant. Capacitor.

 

Doh.

 

 

[sain]

Thanks for the info guys - much appreciated ;). I've been seeing this a lot in aircraft ads recently but nobody I've asked seemed to know and I couldnt find the answer on the rotax site. One referrence I did find was to ducatti dual CDI, which didnt really help either.

 

anyway, cheers!

 

 

[slartibartfast]

I just found a Rotax engine data sheet here which describes the Ignition Unit as a Ducati Double CDI.

 

So that would make it Double Capacitor Discharge Ignition.

 

 

[sain]

Thanks again - thats great

 

 

[Thruster87]

It stands for Dual Carby Dual Ignition [two spark plugs per cylinder] and DCSI stands for Dual Carby Single Ignition [one spark plug per cylinder] Cheers

 

 

[facthunter]

DCDI Etc.

 

I'm with you Thruster 87. N....

 

 

[vk3auu]

The early Aussie DIC's were dual ignition, one being the standard magneto to one plug and the other was a capacitor disgharge to the other, two plugs per cylinder.

 

David

 

 

[Guest TOSGcentral]

For interest in passing:

 

The Aussie DI system was a bolt on conversion to the early Rotax 503 single ignition system and the aircraft had to have some kind of electrical system to run it.

 

My experience with the system (two test flights for handling examination) was not very pleasant. The second ignition system ran off a battery but the aircraft had no charging system. So the battery had to be constantly re-charged for the system to work.

 

Naturally, the owner had forgotten to do this and the second ignition packed up on climb-out. Unfotunately the aircraft would not stay in the air on just the original ignition system (I assume because of combustion chamber alterations to get the second plug in each pot).

 

So the whole thing seemed like a waste of time in terms of failure support. In comparison a R582 DI will run very well on a single plug.

 

The DCDI terminology is just a form of shorthand for adverts such as you get in classifieds for flats etc (that I find incomprehensible). The various combinations are:

 

DCDI - Dual carb, dual ignition

 

SCDI - Single carb, dual ignition

 

SCSI - Single carb, single ignition

 

DCSI - Dual carb, single ignition.

 

This enables you to see at a glance what you are getting.

 

Tony