Altimeter full real.

[Blackdog_kt]

Originally Posted by mcler002

I really need to get into the details of all this stuff (considering ive just purchased xplane 10 and looking forward to microsoft flight) get myself a few aviation books, better controls etc.

Anyway at the moment im trying to get the hang of bombing (in the Blenheim) and i now assume that the figures above (Height differences) also play a crucial role in bombing?

Atm i have created a simple practice bomb route via multiplayer (see attached mission) with a blenheim & he111 @ 10000ft (roughly) and another blenheim @ 19000ft (roughly). So far using the calculations given to me from BlackDog (Thread title - Work out TAS from meters? For bombing) i still appear to be bombing short from the target. So my question is?

a) Should i create a mission where i take off from an airbase? (where i can set the correct altitude)

b) Since my target is Le Touquet airfield, would i need to add/ subtract the difference in altitude? would this make a big difference?

Other than that. I hope in the future that the full mission builder could have both FT/KM and MPH/KPH for the different armies rather than just the 'German' unit measurements

Ross

I think going above 5000ft with the Blenheim is going to stretch it a bit. It has no autopilot and the higher you are, the harder it is to align the target because the cockpit framing obstructs the view out ahead: by the time you can see the target, the higher you are the less time you have to align it.

It could be possible to bomb from 10000ft or so but you would need other people with you to bomb as a group and saturate the area, as it's not that easy to hit right on the bullseye any more.

As for the altimeter differences, for optimal results yes, they should be taken into account.

What you need to bomb accurately is:

1) Your GS (speed relative to ground): This is indicated (IAS) converted to true (TAS) airspeed at your current altitude and then also corrected for wind. For example, if your TAS is 250mph but you have a 20 mph headwind, you GS is 230mph.

2) Your altitude above the target: This means you need to know your altitude above sea level and the target's altitude above sea level.


So, if i'm flying at 10000ft and bombing a target that is on a hill 1500ft high, i will calculate and use a TAS value for 10000ft (no idea what we can do about wind yet to get GS in the non-automatic sights), but the altitude i will input on the bombsight will be my altitude - target's elevation = 10000 - 1500 = 8500ft.