Sun Mar 09, 2008 5:44 pm
krlang wrote:In most of the airplanes I work on, the rarity being the Fadec airplanes. You start the engine pretty much the same way. You get it spinning beyond a certain percentage, when you move the power lever out of cutoff to put in the fuel the auto ignition is engaged and it lites off and there is a temp limit you shouldnt exceed. You also make sure there is sufficient oil pressure during the start sequence. If either look abnormal you take the fuel away, and let the engine motor to keep the air moving through it. (the FADEC engines add the fuel in for you, you just hit the start button)
Pretty much right on. Except that in almost all manual control engines you push the starter, hit a certain N1 (or N2 in some engines), ignition on and throttles out of the gate into idle.
FADEC and (ECU) type engines do almost everything except pushing the starter button on thier own and taking the throttles out of idle cut-off.
Sun Mar 09, 2008 5:48 pm
krlang wrote:famvburg wrote:The famous Wayne Handley and his Turbo Raven first engine start.
The Manual Override lever was saftey wired in the wrong direction.
(The manual override is a Single Engine requirement, in case if FCU issue)
It dumped full fuel in at the start, it cooked the thing. they show that picture at the classes in Montreal too. That was a great airplane to see at airshows until his accident. It was a single PT-6 on a low wing acro airframe. It looked alot like the Turbine Toucan.
Yes, that was not a good time for Wayne. The PT6A-25C engine was a pretty rare engine at that time. Can't remember where he found his first one (I knew of one in Australia) as we had purchased the last two out of Brazil (one new one used) that were not being used.
Sun Mar 09, 2008 6:37 pm
And they say, most times starting a jet is as exciting as turning on a ceiling fan. 
Regards,
Regards,
Thanks
Sun Mar 09, 2008 11:34 pm
Thanks for the replies. One follow-up question- why are lean starts hot? Is it too much burn, not enough fan?
Mon Mar 10, 2008 5:00 am
Lean starts are hot because of not enough air going through the engine to keep the combusted mixture moving out the back.
BTW, do you know if the aircraft in question has had the engine retuned for the new Jet-A blends that were introduced last year? I know the CWAM L-39s had to be redone last year due to that issue.
BTW, do you know if the aircraft in question has had the engine retuned for the new Jet-A blends that were introduced last year? I know the CWAM L-39s had to be redone last year due to that issue.