AriesFirewind 0 Posted February 21, 2017 Share Posted February 21, 2017 Hello guys. I am new here and up to now all was fine actualy it is most likely still fine but I came here due to problems of engine get on fire due to flying on high altitude. I notices that whatewer I do I cannot 6-300 get above FL150 and I see in spec that top altitude is at FL250. I like to fly in alps a lot and this is big problem for me. Main issue is that my engines get in ITT red area and get on fire. I tried to cool them a bit but I noticed that only power setting have some impact on ITT temperature. prop RPM don't show any change nor blower handle I found out at bottom of cockpit. I am almost sure that i somehow missing big part of handling twin otter engines and I would apreciate any help here on how to maintain propper cooling. One thing to note is that on my last attempt I was at 12000 ft and ITT came dash above mid 6 to 7 and it tend to rise with altitude. As I saw fuel levers only have on/off positions (someone correct me if i am wrong pls). ANyway. I am waiting patiently for tips and general engine management How'to See you all Tommy Link to comment Share on other sites More sharing options...
MarkHurst 173 Posted February 21, 2017 Share Posted February 21, 2017 As you get higher your ITT will rise for the same power lever setting, so you need to back it off. But you can decrease RPM with the prop levers, which increases torque. Link to comment Share on other sites More sharing options...
AriesFirewind 0 Posted February 21, 2017 Author Share Posted February 21, 2017 hehe thanks. I knew that there is some "trick" Link to comment Share on other sites More sharing options...
softreset 9 Posted February 21, 2017 Share Posted February 21, 2017 Novice pilot here but here's what I've had good luck with: - Set take off power (typically about 45 psi) - Initial climb out is usually about 1800 - 2000 FPM until about 1200 AGL - Set climb power for about 800-1200 FPM and usually trim for between 110 - 90 IAS (based on wind, weather and weight I'll sometimes dial up the IAS but I try to never exceed 1500 FPM) - Usually every 2000 feet I'll "readjust" for what Mark indicated, the ITT will climb. I try to stay a few ticks below yellow on the ITT and just let the torque fall where it may. I've never exceeded torque pressure when maintaining acceptable ITT (at least not yet) - I'll leave the props at full until cruise and then I'll dial back to about 75% and then adjust for fuel flow, usually around 250 PPH (500 PPH total) I've yet to have an engine fire and I've found the speed/fuel efficiency to be acceptable for the type of aircraft. Link to comment Share on other sites More sharing options...
AriesFirewind 0 Posted February 22, 2017 Author Share Posted February 22, 2017 Thanks for tips guys. I did onemore flight later after posting this topic and I basicaly tried to maintain 6,5 on ITT with my power lever since that was only obvious lowering ITT anyway. So my climb was mostly below 700 FPM and I managed to get to 17000 ft nicely. I will try also one more climbout with slightly different aproach and that is I will lower my rpm a bit in climb and try to tweak power to maintain about same climb rate. I will see what that will do but I am generaly ok with what i achived. I guess I will go and test how high I can go without stall in full plane and without engine fire. Just to satisfy my curiosity and to see can i get to max 25000 as it is written in specs. Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted February 24, 2017 Aerosoft Share Posted February 24, 2017 You do know that the aircraft is not pressurized? Link to comment Share on other sites More sharing options...
softreset 9 Posted February 24, 2017 Share Posted February 24, 2017 https://en.wikipedia.org/wiki/Time_of_useful_consciousness You've got 3-6 minutes Aries! Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted February 26, 2017 Aerosoft Share Posted February 26, 2017 Twotters intended to fly high almost always had oxygen systems for the pilots. Please login to display this image. Link to comment Share on other sites More sharing options...
softreset 9 Posted February 26, 2017 Share Posted February 26, 2017 Also if you're looking for regulations (I understand that's important to some people who sim) http://www.risingup.com/fars/info/part91-211-FAR.shtml Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.