Which is faster EC135 or EC145. Keeping in mind that the EC135 would probably be close to max gross with our configuration, while the EC145 would have the same crew and equipment which should allow more power for speed?

Which variant of each are you looking at? Fresh off the factory floor? So a 5 blade D3 H145 vs the H135P3H. Or are you looking at used airframes so you could be looking at BK117c2 (traditional tail) or BK117d2 (fenestron tail but 4 MRBs) 

negligbile. a lightly loaded helicopter is not appreciably faster

Do you have a budget????

If not>>  D3

I'd opt for a single engine, a twin doesn't pencil out due to re-imbursment rates. otherwise,  I'd be looking at the S76

for the thread to derail with replies that have nothing to do with the question. 

alltogether.  go fixed wing

The 135 is faster and cheaper to operate. Base price 2M cheaper. Less mx items. Lower DOC.

Lean out your crews and carry less crap and 135 will outrun a 145 all day long.

Ask the launch customers of the 145s who have had them 15 years now.

The 135 is the only way to go.

EC-145=137KTAS; H-145D2/D3 =138KTAS; EC-135 & H-135=134KTAS...All close approximate values.

Not much difference and who cares about 2 or 3 KTS.  No helicopter is "Fast."

Useful load is what counts.  If that is the objective and variable and fixed operating costs are not a factor, then the H-145D3 is the choice.  If variable and fixed costs are the main objective, then the H-135 is the way to go.

An above poster had it correct...Lighten the equipment and medical personnel.  Equipment is easy, medical personnel are generally "Robust" and not quite so easy to convince anyone they are not in shape to fill a flight position.  Short of that, we all know fuel is the variable.

Remember, the EC-145 is a legacy aircraft and is becoming more and more expensive to maintain because they are on the back side of the curve.

After 35+ years in the HAA sector, most aircraft choices are based upon some medical manager looking at a picture and saying "We want these because it looks cool or it will do everything we need..."  Then they convince the bean counters it is the best choice and find out once they take delivery, in most cases the aircraft can't get out of it's own way due to the loading expectations.

v/r

137 knots. lol

you've never flown it

variable costs are an objective but fixed costs are not? lol. wuts a legacy aircraft and why must I remeber this. wuts the backside of the curve. wuts a loading expectation. wut ever should I do. wut the hell are you talking about.

the variable. yes we all know that short of something. lol wut

first sentence is complete bullsh*t. lol