I've found that with the maximum number of tanks in the BBJ you can only fuel up to 80% or you get a warning about MTOW exceeded.

I have it configured for 5 aft tanks and 4 forward giving a total of 32505 kg. In the refuel page 80% of fuel gives 26000 kg, GW 77.6, limit 77.8.

Just noticed these figures are for full payload. With just 1 pax, fuel can be set to 100%.

Edited May 11, 20224 yr by JSmith2112
Just noticed..

Quote

https://www.jetcraft.com/jetstream/2014/10/boeing-bbj-1997-present/

Highlights
BBJ executive lounge-JSPerformance
The Boeing BBJ is powered by two CFM56-7B26 engines each offering 27,300 pounds of thrust. The Boeing BBJ uses 682 gallons per hour (GPH). The range of the Boeing BBJ is 6,237 nm operating under NBAA IFR 8 passengers with available fuel.

Interior
The cabin volume for the Boeing BBJ is 5,390 cubic feet. Typical configuration features 19 passenger and 4 crew seats.

Design
The Boeing BBJ Maximum Take-Off Weight (MTOW) is 171,000 pounds (77,564 kg) with a maximum range of 6,306 nm.

Speed
Maximum Cruise Speed:		470 kts		870 km/h				
Long-range Speed:		452 kts		837 km/h				
Airfield Performance
Takeoff distance:		6,085 ft (1,855 m)				(SL, ISA, MTOW)		
Landing distance:		2,360 ft (719 m)				(SL, ISA, MLW)		
Operating Altitude
Maximum operating altitude:		41,000 ft (12,497 m)						
Noise Level (EPNdB)
Takeoff:			85.4	               Approach:		95.8		Lateral:		94.9
Weights
A.		Maximum ramp weight:		171,500 lb (77,791 kg)				
B.		Maximum takeoff weight:		171,000 lb (77,564 kg)				
C.		Maximum landing weight:		134,000 lb (60,781 kg)				
D.		Maximum zero fuel weight:		126,000 lb (57,153 kg)				
E.		Standard basic operating weight:		92,345 lb (41,887 kg)				
Avionics
Rockwell Collins HGS-4000

Resources
Click here to view the online range map. To receive a more detailed custom range report including detailed aircraft comparisons, contact us at +1 919 941 8400 or [email protected].

Click Here to view Boeing BBJ aircraft for sale by Jetcraft.

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39 minutes ago, JSmith2112 said:

I've found that with the maximum number of tanks in the BBJ you can only fuel up to 80% or you get a warning about MTOW exceeded.

I have it configured for 5 aft tanks and 4 forward giving a total of 32505 kg. In the refuel page 80% of fuel gives 26000 kg, GW 77.6, limit 77.8.

Just noticed these figures are for full payload. With just 1 pax, fuel can be set to 100%.

It's very common in business jets with AUX tanks available that full fuel and full payload is not possible. It's a retrofit, and the engines on the BBJ are the same as on the standard 737-700. These aren't really made to carry these kinds of loads. So you'll have to choose between max range and max payload.

Edited May 11, 20224 yr by psychedelic_tortilla

53 minutes ago, psychedelic_tortilla said:

It's very common in business jets with AUX tanks available that full fuel and full payload is not possible. It's a retrofit, and the engines on the BBJ are the same as on the standard 737-700. These aren't really made to carry these kinds of loads. So you'll have to choose between max range and max payload.

I hadn't realised that the aircraft had been configured with max cargo and 30 pax. Reducing to 4 pax and about 700 kg of cargo I was able to load 100% fuel.

So for example FACT to EGLL with 4.7t left in the tanks looks possible. Just under 13 hours flight time according to Simbrief. 

12 hours ago, Dillon said:

Just wondering if there's something on my end or is there something off with the fuel range of their BBJ.   The range of the BBJ with AUX tanks is 6,000nmi.  A flight from Atlanta to EGGW (Luton) is 3,646nmi. The PMDG BBJ tells me 'Not Enough Fuel' with AUX tanks fully loaded with the maximum tank choice option.  Basically, I can only get half the range of the real BBJ.  Is anyone else seeing this?

FWIW   this is what I got with  KATL-EGGW Alt EGCC  ETOPS

SimBrief 737-700 BBJ profile calls for  53192 LBS fuel , 15PAX

I put on 55000, a little extra for mom and the kids 😃

 ZFW 110,9

 GW 166.0

Estimated fuel at landing 11.5

2 hours ago, psychedelic_tortilla said:

It's very common in business jets with AUX tanks available that full fuel and full payload is not possible. It's a retrofit, and the engines on the BBJ are the same as on the standard 737-700. These aren't really made to carry these kinds of loads. So you'll have to choose between max range and max payload.

No, the BBJ1 is not just a retrofitted -700 with an executive interior and some aux tanks.  The BBJ1 has the heavier-duty wings and landing gear of the 737-800 airliner, and a MTOGW of 171,000 lbs versus 154,400 for the 737-700.  Also, BBJs are fitted with more powerful CFM56-7B27 engines (27300 lbs of thrust versus 24000 on the -700) to better accomodate heavyweight ops and provide more performance margin when operating out of the smaller airfields commonly used by private operators.

21 minutes ago, Bob Scott said:

No, the BBJ1 is not just a retrofitted -700 with an executive interior and some aux tanks.  The BBJ1 has the heavier-duty wings and landing gear of the 737-800 airliner, and a MTOGW of 171,000 lbs【77.564 kg】 versus 154,400 for the 737-700.  Also, BBJs are fitted with more powerful CFM56-7B27 engines (27300 lbs【12.383 kg】 of thrust versus 24000 on the -700) to better accomodate heavyweight ops and provide more performance margin when operating out of the smaller airfields commonly used by private operators.

Well, I stand corrected! 

1 hour ago, 454TH said:

FWIW   this is what I got with  KATL-EGGW Alt EGCC  ETOPS

SimBrief 737-700 BBJ profile calls for  53192 LBS fuel , 15PAX

I put on 55000, a little extra for mom and the kids 😃

 ZFW 110,9

 GW 166.0

Estimated fuel at landing 11.5

So it's something I was doing wrong with the load.  That's why I asked.  I'll check later today to see how it works out.👍

If things work out one way, great.  Now the real challenge is can I do a return flight from EGGW to KFFC against the wind and see what's left in the tanks.😳😎

Edited May 11, 20224 yr by Dillon

Got same numbers from Littenavmap where I've been flying FACT to EGLL for a few hours. I grabbed a generic 737 Littlenavmap aircraft performance file and edited the max fuel and then used the merge performance tool:

PMDG 737-BBJ BW PMDG House Blended Winglets (N737BJ | 2021) - B737
Aircraft
Estimated range with reserve:
6 433 nm, 13 h 51 m

Flight Plan
Distance and Time:
5 306 nm, 12 h 25 m
Average Ground Speed:
428 kts
True Airspeed at Cruise:
465 kts
Mach at cruise:
0,81
Average wind (Manual):
No head- or tailwind

Fuel Plan
Fuel Type:
Jetfuel
Usable Fuel:
32 505 kg, 40 488 l
Trip Fuel:
26 382 kg, 32 860 l
Block Fuel:
30 070 kg, 37 454 l
93 % of usable Fuel
Fuel at Destination:
3 677 kg, 4 580 l
Reserve Fuel:
1 451 kg, 1 807 l
Taxi Fuel:
11 kg, 14 l
Extra Fuel:
907 kg, 1 130 l
Contingency Fuel:
5 %, 1 319 kg, 1 643 l
 

The PROG button in the FMC shows 4.1 metric tons fuel remaining at EGLL. Just 4000 miles to go.

Something's not right. I've been doing a few long haul flights in the 700 BBJ, and think it's a great aircraft, but the fuel burn seems too low. For example I just did OIII-EGKK. Simbrief said take about 16000 kg block fuel for the minimum ZFW and expect to arrive with around 3000 kg. I did the flight with just 10 pax and about 200 kg of cargo and arrived with still 10000 kg of fuel left (definitely too much / winds and flight time were more or less as expected). Fuel flow was showing about 0.9 per engine near the end of the flight, so only around 1800 kg per hour total, but it seemed to average even lower than that. 

On 5/11/2022 at 6:54 AM, Dillon said:

I've added the AUX tanks but it makes no difference in the range.  I found with the BBJ you have to add the fuel for all the tanks in the FMC.  There's fuel options that work different than setting fuel through the default menu.  When you set fuel full in the FMC you can see through the AUX gauge the AUX tanks are full.  Even with this the range is half what it should be to get from KFFC to EGGW.  The FMC states not enough fuel even though all tanks are full including the AUX tanks.

In the Manual it clearly states to use the FMC for adding fuel and Load, or it won't work. 

21 minutes ago, Bobsk8 said:

In the Manual it clearly states to use the FMC for adding fuel and Load, or it won't work. 

Thanks, I wrote this awhile back and have since figured it out.  Now I really don't fly the PMDG NG's until the tablet get's released.  Got to used to the Fenix/FBW birds.

On 5/11/2022 at 1:43 AM, Dillon said:

 A flight from Atlanta to EGGW (Luton) is 3,646nmi. The PMDG BBJ tells me 'Not Enough Fuel'

Have you ever been to Luton?

Believe me, that aircraft was doing you a favour.

On 3/2/2023 at 9:25 PM, DD_Arthur said:

Have you ever been to Luton?

Believe me, that aircraft was doing you a favour.

Comment of the century! You are correct!

This topic has been revived from the ashes twice now. Strange, man.