The most common mis-conceptions re: constant-speed props have been addressed in this thread, for the most part.. just a couple lingering, that I'll try to explain.Mis-conception: Throttle controls engine RPM, prop-control controls prop RPM.. Engine RPM (or engine output-shaft RPM for a turbine, or gear-reduced engine.. ala most big radials), and prop RPM are one in the same. They are as mechanically linked, as a fixed-pitch prop on a C172. Their RPMs go up/down as one.Mis-conception: Prop-control adjusts blade-pitch.. Blade-pitch can go from finest, to coarsest, over and over, throughout a flight, without ever touching the prop-control.Mis-conception: Prop-control is like a gear-shift.. This is a tricky one. Yes, you want the prop-control full forward for a takeoff roll, but you also want (need) it full forward to achieve top speed. The reason, in both cases, is that you want the highest available RPM. I'm not sure about turbines, but I'll assume, like a piston engine, the highest RPM is where the most HP is generated.

One question I forgot to ask.I have read that FSX out of the box does not model turbo props. Not sure if I got this right. I know that the Duke Turbine was was modeled fairly well, but I am not sure of the details.With the new Carenado JetProp, I am wondering how well this type of power plant has been modeled. Maybe this one will take some time to answer as I am sure it will require the expertise of someone who actually has flown this particular aircraft or similar.Bob

Sorry to hijack this,I have NO experience in realistic turbo-props, and I'm looking for one. I been told the only real options are the J41, Turb. Duke, and (more recently) the Bronco X....anymore contenders?Back on Topic!

My favorite... Twin Otter from Aerosoft:http://www.aerosoft.com/cgi-local/us/iboshop.cgi?showd490!20,5850648270,10709

I just remembered a good comparison...Picture the prop-blade as an airplane wing.. The blade's "airspeed" is its RPMs.For an airplane, you "pitch for airspeed".. like your target airspeed during a climb is Vy. You adjust the wing angle-of-attack to maintain a constant airspeed.The constant speed prop continuously adjusts the blade angle-of-attack to maintain ITS constant speed (RPM)... selected by the prop control.

Edited January 13, 201214 yr by Brett_Henderson

My favorite... Twin Otter from Aerosoft:http://www.aerosoft....850648270,10709

Have the Twotter actually, got it free(contest), do enjoy doing the hops between TNCM-TFFJ!

EDIT: Sorry, didn't realize the OP was specifically asking about turboprops, vice what the subject line was leading. Will leave links up anyway as it's good info.All this talk about understanding constant speed props, and nobody has posted links to John Deakin's articles?These articles are required reading for any pilot seeking a complex endorsement. Yes, lot's of reading, but well worth it:Pelican's Perch #15 - Manifold Pressure Sucks (http://www.avweb.com...n/182081-1.html)Pelican's Perch #16 - Those Marvelous Props (http://www.avweb.com...n/182082-1.html)Pelican's Perch #18 - Mixture Magic (http://www.avweb.com...n/182084-1.html)Pelican's Perch #19 - Putting it all Together (http://www.avweb.com...n/182085-1.html)Enjoy and hope you learn something!

Edited January 13, 201214 yr by RedSpinnaker