In article om,
says...

On 2017-06-07 06:20, Jeff Findley wrote:

No, this is not correct. The Dragon "trunk" does not have any
propulsion systems. As many systems as possible are packed *inside* the
Dragon reentry capsule to be reused on subsequent flights, like this one
(CRS-11 is reusing the capsule from CRS-4).

Does this mean fuel tanks are also in the Dragon and not in the trunk?

Absolutely. Again the "trunk" is a big empty metal can intended to hold
external payloads.

I guess my thoughts were tainted by Soyuz and Apollo that had mosts of
their systems in the module.

Yes, SpaceX is doing things differently precisely because they planed to
reuse Dragons from the beginning. Throwing away even half your
spacecraft on every flight is daft.

So when Dragon needs to accelerate forward, wouldn't engines on Dragon
throw hot gases at the solar arrays atached to the trunk ?

No, they're angled away from the arrays and the trunk. It's less
efficient than "straight line" thrusting, but again, the goal is to
reuse Dragon, so some inefficiency in the engine placement is allowed.
This is opposed to the "performance uber alles" philosophy of the
Apollo/Soyuz design days where "steely eyed missile men" designed the
things.

Jeff
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