|
Post by windrunner on Mar 3, 2008 8:42:08 GMT -5
I'd like to convert one of my Cessnas into a turbo version: what parameters do I have to change? and, do I have to modify the air file as well? thanks. Or if someone want ot do it for me...well, thanks a lot!
|
|
|
Post by jimslost on Mar 3, 2008 13:10:27 GMT -5
On the face of it, it's a rather simple conversion, provided you have all the necessary numbers (which usually means having the POH at hand). There are four lines in the aircraft.cfg file that need to be addressed (these examples are from a supercharged Pratt & Whitney Wasp SC-1 I "built" for a GAS project).
turbocharged=1 //Is it turbocharged? 0=FALSE, 1=TRUE max_design_mp=32.0 //Max design manifold pressure, (inHg) min_design_mp=6 //Min design manifold pressur x x xH{) critical_altitude=4550 //Altitude to which the turbocharger will provide max design manifold pressure (feet)
Depending on whether or not the prop is fixed pitch or constant speed, you may need to make adjustments to that as well. Although I'm not sure it's necessary, I make certain the .air file has the same data in the appropriate fields. I use the no-longer-supported Aircraft Airfile Manager to edit my airfiles, but AirEd and any of Jerry Beckwith's products will do the job just as well.
Hope this helps.
|
|
|
Post by robert4368 on Mar 3, 2008 20:04:54 GMT -5
Check the turbo conversion of the default Baron 58, over at SimV, I believe. Very well done aircraft. Should be able to compare the two.
|
|
|
Post by windrunner on Mar 4, 2008 10:04:15 GMT -5
Well, I already did some changes to both files (cfg and air) and it seems to work fine. Now, I'll have to find the right numbers to insert there (I'm after the Cessna 210, I'd like my C210M turn into a CT210).
So far it worked. BTW, I'm using AirEd to edit the air file.
Thanks!
|
|
|
Post by attaway on Mar 4, 2008 17:40:33 GMT -5
Hi Windrunner: For more recent aircraft, try finding the faa type certificate data sheet for the engine: rgl.faa.gov/Regulatory_and_Guidance_Library%5CrgMakeModel.nsf/0/DFBCCA633CD280F28525670E0047BEE4?OpenDocumentGot that by googling 'continental tsio-520 tcds'. From more googling, looks like you want model 'M', take off 310 hp @ 2700 rpm with 36.5" boost, critical altitude 17,000 ft (35" boost). I'd use 36.5" and 16-17,000 ft critical altitude. You can stick with '6' for min boost, check your idle. If she stalls, goose it up, if she's running too fast at idle, bring it down. Have fun! The first thing I do with a new aircraft is hot-rod it just like you are doing with your Cessna. You should check out my Waco RNF with the super-scarab I dropped in it ... that extra 20 hp makes the little biplane just perfect!
|
|
|
Post by windrunner on Mar 5, 2008 8:45:17 GMT -5
Thanks Stephen! that pdf has lot of good information and a good starting point and, of course yo got it right. I'll go for those numbers to see how it goes. Fingers crossed!
|
|
|
Post by windrunner on Mar 6, 2008 11:26:03 GMT -5
Well, I've done those changes to the cfg and air files; I have "won" about 20 knots during cruising without suffering penalties on the range at 8000 feet; I wont go higher 'cause my C210 is not pressurized...lol.
Now I'll have a fleet of turbo Cessnas! the 182 RGII is the next.
|
|