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About flycaptjon

  • Birthday August 20

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    Dallas/ Fort Worth, Texas, USA

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  • About Me
    Real World Commercial Pilot ASEL/MEL Instrument Airplane; 1600+ total time; 900+ Cessna Twins C310, C340A (750+), C401, C414, C414, C421, C441 Conquest II; Use X-Plane to backup real world training and practice emergencies we would not want to do in the real airplane. Also, keeps me mentally fresh when there are gaps in flying due to the challenges of real life and my non-flying career.

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  1. If you were to copy your C340 folder and move it, then reinstall the Carenado C340 you should then get the baseline aircraft.cfg. If you are looking for something else, let me know. I have a set of Service Manuals for real life C340s and all the engine specs are available. Cheers, captjon
  2. flycaptjon

    Which C340 II?

    I agree XP and FS or FS9/FSX would help. There are differences in both systems configuration files/ aircraft files and other anomalies, so technical issues /bugs can be very unique to sim platform. My .02 adjusted for inflation.
  3. Cverl, please refer to my post in this C340 forum under 'Cessna C340 Fuel System and Procedures'. I have several hundred hours in a real world Cessna C340A with the RAM IV upgrade to 325hp TSIO-520NB engines. In the post mentioned above I have detailed the fuel management procedures, the power settings data for Cruise Climb 82%, Cruise 75%, 65% and 55%. I had to modify the Carenado config file quite a bit to be realistic. I have also filed bug reports on their support site for the bugs in flap settings and a couple of other issues as Highiron had also pointed out. Overall a great airplane, but I'm not sure the basis of the technical data they used for the design spec. I have a set of operating and service manuals for the C340 and while they miss some key specs. The flap settings on most C310s are 15/45 for the early models A thru H, and 15/35 for I thru the R models. The C340 and most piston 400 family are 15/30/45, except for the 404 and the turbo prop 425, 441. Cheers, Jon
  4. flycaptjon

    Cessna C340A Fuel System and procedures

    Hi Robert, Yes, with the exception of the Aux tank capacity options... the C310 is virtually the same. I have flow C310J, L, N and Q models and you use the same fuel management procedures as with the C340. The fuel selector positions and labeling is the same as the C340 (and for that fact the C400 series piston twins as well). I believe the Milviz C310 is an R model. The R model 310 made the optional three bladed props from the Q model standard equipment and had a lengthen nose, so more baggage area up front like the C340. Happy Flying, captjon
  5. flycaptjon

    Cessna C340A Fuel System and procedures

    Hi Paul, No the unbalanced fuel burn is not normal in the real C340 or in the Carenado 340. There is an anomaly in in FS as I understand it in the fuel selection. In the C340 you should start with full tanks both mains (tip tanks) and Aux tanks. Before starting verify: Left engine, left main Right engine right main starting #1 first then fuel pump on low start #2 then fuel pump on low idle at 1000 rpm to warm the engines Fly for one hour on the mains then increase mixtures full rich switch left engine left Aux Right engine on right Aux ensure you get the lights and fuel flow with no power loss then re-lean for cruise altitude. If you find you are still burning uneven try the following. switch to the C172 and start the engine verifying the fuel selector is on the 'both' position. Then switch to the C340 and it should properly feed from the proper tanks. I have heard this is a bug in the simulator if you shut down with an airplane such as a Bonanza or Mooney with either a right or left tank feed only, and then go to the Carenado airplane either C340 or King Airs. Hope that help you out. Good questions. Always glad to help. captjon BTW, in Cessna Twins NEVER run the mains dry and then switch to the Aux tanks. There is a risk of engine loss and no restart. Instead use, the Cessna procedure I have described. Also, never a good idea to run the Aux tanks dry. Burn down to 5 or 6 gallons per side, then mixture full rich again and switch: Left engine left main Right engine right main monitor as before and then re-lean the mixtures. The engine driven fuel pumps deliver MORE fuel to the injector manifold and then injectors than the engines require. The metering unit sends the unused fuel back via the return lines to the MAIN tanks only on the respective side. So when using the Aux tanks the Main tanks will actually become fuller. That is the reason you must burn the mains for an hour before switching to the Aux tanks. Once the mains are full any extra fuel is vented overboad via the fuel vent lines... Not only are you throwing away precious fuel and BIG $$$ these days, but you are reducing your range and what you may have flight planned... captjon
  6. flycaptjon

    Cessna C340A Fuel System and procedures

    John, I have the POH, service manual and parts manual for the C340/ C340A as well as the Simcom flight training manual for the initial training I took. The 'book' value for the critical altitude with the TSIO-520NB engines is 25,000 ft. That said, when I used that value I did not get actual performance as the 1979 340A with the 325hp RAM IV. I found that neither FSX or XP9/10 do a good job of simulating turbo chargers with automatic waste gates. I changed the value to the absolute ceiling of 30,000 ft. and I was able to get the appropriate speeds with the RAM power settings. 75% power Continuing: 25,000' 75% Power 33.5" MP / 2450 RPM / 1550F EGT 65% Power 30.5" MP / 2400 RPM / 1550F EGT Maximum Range Cruise 55% Power 27" MP / 2300 RPM / 1550F EGT Cruise Climb is at 82% Power 32.5" MP / 2450 RPM / 1450F EGT Now you only want to climb high based upon winds aloft and tail winds. Depending on your direct of flight and the prevailing winds -- especially at the upper altitudes were the jet stream has an impact -- you may face a 50 to 100+ kt. headwind... In that case, you may want to cruise lower even down to ~FL120 or so to reduce the headwinds. Yes, with the heavy and freezing precip, you will encounter induction icing. When that occurs pull the 'Alternate Air' on. It is located on the pedestal below the auto pilot head and the cowl flaps. When that occurs, I pull alt air 'ON' and cowl flaps 'closed' and monitor the CHT keeping it > 300F and < 450F (usually not a problem in freeze levels). Hope that is useful, Cheers, Captjon
  7. flycaptjon

    Cessna C340A Fuel System and procedures

    Thanks for your question Robert. I have flown the FSX version, so I cannot comment about it because I no longer use the MS FS products since they no longer meet my needs (and I started with FS2.0 on an Intel 8088PC in 1986). I understand the FSX and XP version perform the same based on similar platforms and hardware. For the XPlane version both in XP9 and 10, I had to modify the aircraft file to meet real life airspeed, climb, cruise and altitude performance. The limitation was primarily in the parameters controlling the effect of critical altitude. Once I raised it to 30,000' I got similar performance. I cannot remember how to affect that in FS since I have not down that in years, but focus on the engine output and turbocharger compensation for critical altitude. At the upper altitudes you should be able to maintain at least FL250/260. Everything will be pushed to the firewall, but you will be within limits. You may be cruising at 130kts indicated with maybe 21/22" manifold and 2200 RPM with the engines leaned out to about 1550-1600C EGT with the RAM IV (the VI is about the same). With 2 pilots and full fuel (166gal.) we can maintain FL260, but with the factory settings I had serious performance issues starting around 11,000' and could not hold altitude and airspeed at 16,000' in my initial tests. In the actual 340 we customarily cruise FL210 to 240 if the winds are favorable. I have picked up anywhere from 100 to 150kts. additional groundspeed in the Jetstream in the winter months and based on flight paths. Conversely, if the winds are working against you we normally fly down FL120 to FL160 for best fuel burn if the upper winds are not working with us. Once tweaked the fuel burn, handling, and other dynamics are very realistic. So other then tweaking the performance there were a few other minor bugs, which I have reported via bug reports to Carenado. Mostly, the analog OAT gauge issues, and the annoying flap gate which should be optional, and the coding of only two stages of flaps. Real C340s have flaps 0, 15, 30, and 45 degrees, so three stages. Hope this helps. Cheers, Jon
  8. I have seen a number of posts and queries about the C340A and its fuel system, fuel burn. In time I may post some diagrams of the fuel system from the aircraft POH, and Maintenance Manual. For now I contribute the following to help the forum users. I'm a real world commercially rated multi-engine pilot with over 750 hours in C340A's specifically and other Cessna twins including C310s (got my multi-engine rating in a C-310Q model), C340As, C401s, C414, C421B, and C441 Conquest II. To clarify the Carenado C340 is according to their tech support, is a 1974 C340A II (with the I, II, and III designation of different levels of Cessna factory avionics packages: Nav-O-Matic series 400, 800 and 1000 respectively), with the factory Continental TSIO-520-NB 285hp per side; turbo charged, injected, horizontally opposed 520 cubic inches, or 8.15 Liter engines. The C340A I have flown most often is a 1979 C340A II with the 325hp RAM Series IV engine upgrade. The fuel system in it is identical to the one on the Carenado C340A. The main tanks are the wing tanks 102 gal/ 100 gal usable The auxiliary tanks are in the wings outboard of the engine nacelles. 43 gal usable Total fuel 166 gal. Please note the following point for fuel management: All take offs and landings are to be done on the main tanks (tip tanks). It is recommended for longer fuel bladder (rubber bladders) life that the Aux tanks be kept full regardless if you typically fly short flights as the fuel lubricates the bladders and keeps them from drying out and cracking and leaking. In flight you take off on the main tanks noting take off time. You burn the mains for one hour, then regardless of altitude full mixture RICH Switch tanks to Aux and note the Aux fuel light turns on at the panel. With both tanks now on Aux and both lights lit, re-lean the mixtures to the previous EGT settings usually about 1450 to 1650 on the Carenado, we use 1450 with the RAM IV at 82% cruise power. If your flight plan is long enough burn the Aux tanks down to no less than 2 to 5 gal per side (you do not want to run the tanks dry, but it you forget and the engine starts to stumble: the rapid response is mixtures FULL RICH, left tank, left main, right tank, right main and see that it smoothes out then re-lean the mixtures. When the Aux have burned down to ~2 to 5 gal per side, mixtures full RICH, switch to MAINS, and re-lean mixtures. You will find that after burning on the Aux tanks for any appreciable time, that the main tanks will INCREASE in fuel. This is because the fuel system (fuel pumps) send more fuel to the engines than is required by the fuel metering unit which supplies fuel to the fuel manifold (kind of looks like a round disk with spider legs) and then to each of the six cylinders. The unused fuel is then send via a pressurized return line back to the main tank (on the side from where it came from) regardless if it was fed from the main or Aux tanks. So the return fuel will always increases the fuel levels in the main tanks. It is for this reason that you burn the MAINS for at least 1 hour before switching to the Aux tanks. Otherwise, if you took off and immediately switch to the Aux tanks, the return fuel to the Mains, would soon overfill the Mains causing valuable fuel to be pushed overboard via the fuel vent lines and out into the atmosphere... talk about burning $$$ and effective range! So that's all for now, in my first post to this forum. I hope at least some may find this interesting. Clear skys! Captjon