mraviator Posted January 13, 2013 Report Posted January 13, 2013 I just discovered I could not start the engines at Quito, Ecuador (13k+ feet altitude). What is the max altitude for engine start in the CRJ2? Quote
Patrik Hedström Posted January 13, 2013 Report Posted January 13, 2013 Are the fuel pumps on? Are the fuel valvs open? Quote
Cooley Posted January 13, 2013 Report Posted January 13, 2013 (edited) The aircraft limitation is that you need to be below 13K FT to perform an APU assisted air start. I tried it at 10K and I was able to get the aircraft started. If you were leveled off at 13K did you have the baro set correctly for the area? The CRJ may have a hard limit in the sim if it calculates you above 13K FT. The other alternative is a windmilling re-light, but that requires the aircraft going over 300 KTS to get sufficient air through the engine. You need to be a lot higher altitude to start that procedure as the aircraft needs to be descending at a rate of 6K / min to get the speed up. Edited January 13, 2013 by Cooley Quote
Patrik Hedström Posted January 13, 2013 Report Posted January 13, 2013 Could you use a GPU to start the engines? Quote
Cooley Posted January 13, 2013 Report Posted January 13, 2013 Could you use a GPU to start the engines?GPU are for electrical. You still need pressurized air. When the APU was inop we always had an air cart at the gate to start one engine. We would then taxi out then perform a cross bleed start from the other engine. Quote
Patrik Hedström Posted January 13, 2013 Report Posted January 13, 2013 Ah ok pardon my ignorance. Quote
mraviator Posted January 13, 2013 Author Report Posted January 13, 2013 I should probably mention I was not in flight, but on the ground at Quito, Ecuador (~13400ft). APU started with no issues. I tried both gravity feed and both fuel pumps on, no luck. To try and "trick" the sim, I raised the baro pressure to 33.4 inHg to get a pressure altitude of way below 10k, but that did not do the trick either. Quote
philipp Posted January 13, 2013 Report Posted January 13, 2013 (edited) Quoting from Chapter 2 "Limitations" of the CRJ-200 Airplane Flight Manual, section 4 "Operating Limitations":Maximum airport pressure altitude for take-off and landing is 8,000 feet. That is, even if you could start the engines, you couldn't legally take off there. Edited January 13, 2013 by philipp 1 Quote
Cooley Posted January 14, 2013 Report Posted January 14, 2013 oops...I didn't pick up on it that you were at an airport elevation of 13K FT. Yeah, the CRJ is not going to be able take off at that pressure altitude. Quote
cessna729 Posted January 14, 2013 Report Posted January 14, 2013 (edited) Quito/Mariscal Sucre International (SEQU) is not as high as 13000ft, it's only Elevation is 9229 feet MSL. The new New Mariscal Sucre International Airport (SEQM) is even lower 7910ft (Note the new airport will if it ever gets finished have a Rwy 13451 ft long!). (So you could always hang around at SEQU and hoping the Wx changes a bit or wait till they finish the newer airport SEQM Lots of other aircraft seem to get in and out od SEQU ok. (didn't see any CRJ2's though!http://uk.flightaware.com/live/airport/SEQUhttp://www.trafficpowerhouse.com/readallaboutit/wp-content/uploads/2012/08/quito-airport.jpghttp://skyvector.com/?ll=-0.22759949267374257,-78.34753418334321&chart=301&zoom=1cessna729. Edited January 14, 2013 by cessna729 Quote
cruster Posted January 14, 2013 Report Posted January 14, 2013 I'm curious if it would be possible to set XP for "start with engines running" or whatever, as a workaround. Probably not, though. Quote
mraviator Posted January 14, 2013 Author Report Posted January 14, 2013 Quito/Mariscal Sucre International (SEQU) is not as high as 13000ft, it's only Elevation is 9229 feet MSL. The new New Mariscal Sucre International Airport (SEQM) is even lower 7910ft (Note the new airport will if it ever gets finished have a Rwy 13451 ft long!). (So you could always hang around at SEQU and hoping the Wx changes a bit or wait till they finish the newer airport SEQM Lots of other aircraft seem to get in and out od SEQU ok. (didn't see any CRJ2's though!http://uk.flightaware.com/live/airport/SEQUhttp://www.trafficpowerhouse.com/readallaboutit/wp-content/uploads/2012/08/quito-airport.jpghttp://skyvector.com/?ll=-0.22759949267374257,-78.34753418334321&chart=301&zoom=1cessna729.Duh! I was at SLLP, not SEQU. My bad for posting the wrong airport. http://en.wikipedia.org/wiki/El_Alto_International_Airport13325 ft...no wonder they call it El Alto! Quote
cessna729 Posted January 14, 2013 Report Posted January 14, 2013 I'm curious if it would be possible to set XP for "start with engines running" or whatever, as a workaround. Probably not, though.Good idea cruster Just tried it (at SLLP with XP9.70 cos I havn't loaded from DVD SLLP scenery, so the airport sits at about 8ft amsl in XP10.20b11 at the moment so I can srart the engines in that XP version) .If I load the CRJ engines running (in XP9.70) they continue running, but when I try Cold-n-dark, I can only start the APU, no luck with the with the two main engines.cessna729. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.