Caldera Posted June 25, 2023 Posted June 25, 2023 Hey All, This alarm comes off main tank level? I may go insane, Miss Betty will not be quiet! I am starting to understand that fuel is transferred from other tanks into the main tank, but in the mean time Miss Betty has a kaniption (goes crazy) and will not stop repeating "WARNING FUEL LOW". BTW her speech annunciation is absolutely perfect. For example, having the crew chief de-fuel from 100% to 60% seems to empty the main fuel tank and trigger the warning Miss Betty so tirelessly delivers. She stops when level in the main fuel tank is sufficient. The bingo fuel pointer is set at zero the whole time so I am not quite understanding the logic of the warning. What am I doing wrong? Caldera
Rainmaker Posted June 25, 2023 Posted June 25, 2023 (edited) Fuel low is based on feed tank quantiles not bingo level. There may be a bug, or DCS limitation, when refueling that it starts removing from the feed tanks first. Edited June 25, 2023 by Rainmaker
Caldera Posted June 25, 2023 Author Posted June 25, 2023 (edited) OK Thanks! Miss Betty going crazy with 10.9 total fuel. But stops when fuel in "INTL TANK" gets above about 2.2 transferring from "CONF TANK". So if I understand you correctly, the Fuel Warning Low warning is set by the bingo pointer and should be activate based upon total fuel quantity? Caldera Edited June 25, 2023 by Caldera
Rainmaker Posted June 25, 2023 Posted June 25, 2023 1 hour ago, Caldera said: OK Thanks! Miss Betty going crazy with 10.9 total fuel. But stops when fuel in "INTL TANK" gets above about 2.2 transferring from "CONF TANK". So if I understand you correctly, the Fuel Warning Low warning is set by the bingo pointer and should be activate based upon total fuel quantity? Caldera Its tied to feed tanks, not internal ’Bingo Fuel’ warning is tied to your setting on the indicator.
Caldera Posted June 25, 2023 Author Posted June 25, 2023 Yes, I just tested it. Moving the bingo pointer to total fuel brings in the warning. For my part, I only need to hear the warning a couple of times, does the actual jet continuously give this warning until the pilot ejects due to insanity? Caldera
Rainmaker Posted June 25, 2023 Posted June 25, 2023 18 minutes ago, Caldera said: Yes, I just tested it. Moving the bingo pointer to total fuel brings in the warning. For my part, I only need to hear the warning a couple of times, does the actual jet continuously give this warning until the pilot ejects due to insanity? Caldera I have not heard it play more than intended, which is twice when the light displays on the panel. It could be related to your defuel thing. I really dont know as never tested personally.
Caldera Posted June 28, 2023 Author Posted June 28, 2023 (edited) Would you try loading 100% fuel from the ME and then de-fueling to about 50% using the crew chief? Just to see if it is the same for you as it is for me. Caldera Edited June 28, 2023 by Caldera 1
Rainmaker Posted June 28, 2023 Posted June 28, 2023 25 minutes ago, Caldera said: Would you try loading 100% fuel from the ME and then de-fueling to about 50% using the crew chief? Just to see if it is the same for you as it is for me. Caldera Did just that. Never saw the feed tanks drop below normal levels so not sure where the glitch might be that I do not see.
Buzzf18e Posted July 18, 2023 Posted July 18, 2023 This happens to me when I forget to switch the conformal tanks back to feed after starting the bird.
EckiSun7 Posted February 2, 2024 Posted February 2, 2024 Am 25.6.2023 um 17:13 schrieb Caldera: Hey All, This alarm comes off main tank level? I may go insane, Miss Betty will not be quiet! I am starting to understand that fuel is transferred from other tanks into the main tank, but in the mean time Miss Betty has a kaniption (goes crazy) and will not stop repeating "WARNING FUEL LOW". BTW her speech annunciation is absolutely perfect. For example, having the crew chief de-fuel from 100% to 60% seems to empty the main fuel tank and trigger the warning Miss Betty so tirelessly delivers. She stops when level in the main fuel tank is sufficient. The bingo fuel pointer is set at zero the whole time so I am not quite understanding the logic of the warning. What am I doing wrong? Caldera Hi, we have the same problem with the F15E. We can’t stop the ladie. Do you have this problem again or do you find a connector where you can stop it. Best Wisches from Germany Eckisun7
leg5840 Posted February 2, 2024 Posted February 2, 2024 Was the Fuel control switch of the CONF TANK in the STOP TRANS position during Defueling?
EckiSun7 Posted February 2, 2024 Posted February 2, 2024 Okay, I will check it next time. Thx EckiSun7
leg5840 Posted February 2, 2024 Posted February 2, 2024 Suspected Symptoms 1. If the CONF TANK switch is set to STOP TRANS and fuel is reduced from 100% to 60%, the INTL TANK will not receive fuel from the CONF TANK, which may activate the FUEL LOW WARNING (TOTAL 1500±200 LBS or L FEED 540 LBS or R FEED 960 LBS). 2. Once the FUEL LOW WARNING is activated by meeting the conditions, all transfer pumps will operate regardless of their switch positions. 3. The transferred fuel entering the FEED tank will increase its level, which will deactivate the FUEL LOW WARNING. 4. When the FUEL LOW WARNING disappears, the fuel control switch will function properly. 5. However, under normal circumstances, due to the fuel consumption of the two operating engines, the level in the FEED tank will decrease, reactivating the FUEL LOW WARNING. 6. Unless the CONF TANK switch is changed to NORM or STOP REFUEL, the process from 2 to 5 will repeat, resulting in a continuous VOICE WARNING. Solution 1. Change the CONF TANK switch to NORM or STOP REFUEL. 2. Check the level in the FEED tank. 3. Press the VM SILENCE button on the FCP SENSOR panel until the voice warning stops. Below is material scrapped from -1. Please read it. Fuel Control Switches Three fuel control switches, labeled WING (external wing tanks), CTR (centerline tank), and CONF TANK are on the fuel control panel. All three switches have the same three positions identified below. NORM Provides normal transfer and refuel of corresponding tanks. STOP TRANS Stops transfer from corresponding tanks, including automatic external transfer, unless FUEL LOW light is on, in which case fuel will transfer regardless of position of this switch. STOP REFUEL Prevents filling of the tank(s) selected. FUEL LOW Caution A FUEL LOW caution, on the MPD/MPCD display, warns the aircrew of a low fuel level in one or both engine feed tanks. The FUEL LOW caution is completely independent of the fuel quantity indicating system and is controlled by a sensor in each feed tank. The sensor in the right feed tank is located at the 960 pound level and the sensor in the left feed tank is located at the 540 pound level. If either sensor is exposed (regardless of the combined indicated fuel quantity) the FUEL LOW caution will come on, The caution normally comes on at 1500 + 200 pounds total internal fuel remaining. The FUEL LOW caution may come on with more than 1500 pounds of fuel remaining if fuel transfer falls behind engine fuel consumption because of transfer system failure or sustained high speed afterburner usage. The FUEL LOW caution activates automatic transfer of fuel from the CFT’s and external tanks regardless of cockpit fuel switch positions. Transfer will stop as soon as feed tanks refill to the sensor levels and will reactivate when the fuel level again drops below the sensors. FUEL, LOW activation will not turn on the tank 1 or CFT transfer pumps if the slipway switch is in OPEN or ORIDE.
jaylw314 Posted February 2, 2024 Posted February 2, 2024 1 hour ago, EckiSun7 said: Okay, I will check it next time. Thx EckiSun7 More importantly, turn off the afterburner Extended use drains the feeder tanks faster than they can be fed by the others. The most common cause of people asking why "fuel low" (although probably not in OP's case)
Q3ark Posted February 3, 2024 Posted February 3, 2024 38 minutes ago, jaylw314 said: More importantly, turn off the afterburner Extended use drains the feeder tanks faster than they can be fed by the others. The most common cause of people asking why "fuel low" (although probably not in OP's case) I can relate, I flamed out the engines after draining my feed tanks during a low level burner run, ever since I keep the feeder tank fuel levels displayed on the gauge. It’s not an issue at higher altitudes as the fuel air ratio is different, the feeder ranks drain slower, the pumps can keep up.
Recommended Posts