I’ve been flying the Longitude for years now, but always used unlimited fuel. I’m wanting to do it right, so I’m trying to get the fuel consumption steps down. Unfortunately I’m doing something wrong, so I hope you pilots out there can set me straight.
Let’s say I have a flight from Seattle (KSEA) to San Francisco (KSFO). I’ve created my flight plan in MSFS and loaded it, and I’m setting up the flight from cold and dark. I’ve also opened LNM and have already set up the fuel entries, which I got from online and at least appear correct:
That in turn creates the following Fuel Report within LNM:
Now if I’m reading this correctly, I’m going to need 3,653 pounds of fuel to get from Seattle to San Francisco. Block fuel is the total amount of fuel that I’m going to need, right? It shows that to be 25% of my usable fuel.
I go into MSFS to set the values like this, actually using 26% just to give myself a little extra:
…And I’m running out of fuel close to my destination. I don’t want to just move the slider to whatever fuel I can hold, and I don’t want to add more fuel when I get the low fuel indicator. What am I doing wrong?
Thanks for any help you can provide.
I just ran your proposed flight plan through Simbrief and it gives a block fuel load of ~ 5000 lbs, so it appears that the aircraft performance data LNM is using for the Longitude is too optimistic.
Also, I know this may be obvious but, make sure your gear and flaps are up and that you are cruising at an appropriate altitude and speed for the flight, otherwise these fuel estimates are invalid.
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Thanks for the quick reply! Yeah, I have a checklist that ensures the retracting of the gear and flaps, and I try to cruise at the right speed and altitude. Those numbers came from a source that I would have believed would be reliable, but maybe they were created before WT got involved and changed everything.
Thank you, I’ll look at getting my numbers from Simbrief, or tweak the LNM file until it becomes more realistic.
Those LNM numbers look like the DAKFLY mod numbers. It might be very old and out of date. The Longitude has undergone significant updates to systems since release, and the older DAKFLY mod I think has been deprecated.
Best way to test is get into a flight at cruise altitude, and check the fuel synoptic and see how much you’re consuming and update the LNM profile to match.
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