Found a very nice surprise this morning...
Mr. Posch upgraded his already excellent freeware Piasecki H-21C "Flying Banana", yesterday.
You can get the upgrade package here:This is an upgrade package that includes:
• Better initial camera view - heli no longer appears too small when loading a flight
• Improved flight dynamics
• Improved lift at high altitudes
• Realistic fuel consumption
• A few minor tweaks
You will need to install the upgrade over the original version which is available here (One marked FSX, in second row):
For those of you that still don't have this wonderful FSX helicopter and are wondering about it, screenshots here: