|
|
Post by jimslost on Apr 27, 2006 1:46:19 GMT -5
I am about 3/4 of the way through the creation of a starter sound file that will duplicate the inertia starters common (if not necessarily popular) in the late 20s through the early 40s. What I need now is to write a start gauge that starts the engine starter sound but delays propeller movement for 11 or 12 seconds. Can someone out there point me in the right direction?
Thanks
|
|
wozza
Flightsimmer
Posts: 78
|
Post by wozza on Apr 27, 2006 6:38:15 GMT -5
|
|
|
|
Post by jimslost on Apr 27, 2006 11:42:10 GMT -5
Thanks for the steers, Wozza. I went to both and read the discussion (and I'll be back for indepth study as well). It looks as though they're on the right track, but unfortunately, they're looking at a slightly different problem.
With an inertia starter, you (or preferably your Able Assistant) insert a crank into the cowling just behind the engine and begin turning. In 10-15 seconds, the flywheel has come up to speed (with a distinctive sound the movie studios used behind the much loved Tasmanian Devil in the cartoons), after which AA withdraws crank and either engages the starter or steps clear while you engage same from the cockpit. If one can judge by the movies in which this is used (Dive Bomber and Five Came Back are two that come to mind), the engine usually fires on the first or second blade; if it doesn't the flywheel disipates its energy fairly quickly and AA goes back to cranking again.
So much for background. I'll study the discussions you gave me and see what I can gleen there. Perhaps this afternoon I'll try to contact them. Thanks again.
I had forgotten that with the bigger radials one must "count the blades" before turning on the mags, but this must not have been too much of a problem, because my dad's C-54 manual notes that those big Pratts had inertia starters installed. Perhaps on that plane, it took two men to wind up the flywheel.
|
|
wozza
Flightsimmer
Posts: 78
|
Post by wozza on Apr 27, 2006 23:48:35 GMT -5
Hi Ok I understand what ya trying to do  ,if it where me Id prob use Doug Dawson's sound gauge to play the inertia starter sound file and generate a L:var,then set the starter switch to only engage when the L:var is activated.The down side is it would prevent CTRL E from starting the engine,meaning the end user would have to go through the startup sequence each time.Of course you get really nuts and model the whole system that respond to prop condition eg if prop is turning X amount of rpm switch on fuel valve if under switch off fuel valve link to an L:Var if mags on start engine this would allow you to do an airstart the only limitation is the imagination  Wozza |
|
|
|
Post by jimslost on Apr 28, 2006 10:23:25 GMT -5
That suggestion definitely leads in the right direction, Wozza. Where would I find Doug Dawson's sound gauge and is there a tutorial on how to modify and install same (I really am coming at this problem from a position of nearly total ignorance)?
And again, thanks.
|
|
|
|
Post by Admin on Apr 28, 2006 10:27:33 GMT -5
Search Doug Dawson at Avsim. You want the last two files that come up but may have interest in some others.
|
|
wozza
Flightsimmer
Posts: 78
|
Post by wozza on Apr 28, 2006 11:19:31 GMT -5
|
|
|
|
Post by jimslost on Apr 28, 2006 15:38:28 GMT -5
Now we're cookin' with gas. Thanks, gentlemen.
|
|
