A320 diverting with ldg stuck down.

[Mooneyboy]

Hello all.

If you had to divert with gear stuck down and wanted to consume as little fuel as possible ( let's say FL100) what speed and config would you divert in? I see there is a section in the FCOM for flight with ldg gear down and there is one table at 230kts clean and one holding table suggesting S speed in config 1. The holding table has slightly less fuel burn than the cruise one but obviously your back at S speed so will take a bit longer.

Also in the QRH fuel penalty factors it suggests 180% ( with gear stuck down) extra burn on top of your normal burn. Why is this penalty so much more than say if you compare holding green dot a/c totally clean to holding with flt with gear stuck down e.g totally clean 60t FL100 2118kg per hour for both engines Vs gear stuck down at s speed 3156kg per hour both engines.

Any help or guidance would be great.