Anfi,
Then tell the client that requiring the twin is not bright
What's that about being bright?!?
The OEI performance of a single is not as bad as people make out, it just means you have to land imediately, its rare and the outcome is also rarely bad enough to justify the downside of the twin
Ever seen what the outcome of an engine failure in a single over 150ft rainforest looks like??? Well, there are still a number of missing aircrafts around the Amazon from that reason.
You have to understand, that there are some places you just can't ''land immediately''. Some places you crash, and then you fall the 50 odd meters to the ground after going through the canopy.... in those cases I'd rather punch off the load (if externally) and pull back on the power and RTB, rather than trying the above mentioned scenario.
If the client are willing to pay the extra for the twin and get less efficiency, well what's wrong with that??:roll eyes:
As for this
If a twin has to make 2 trips instead of 1 then there is more exposure, 4 engine trips and 2 times the exposure of other critical components to achieve the same thing payload transfer.
The loads very often is in the region of 6-700kg in any case, (heavy equipment which is split into main components) so to save the amount of trips the loads would be 12-1400kg's which would be too heavy in any case even for a B3e due to the temp.