Question came up on why technology from other industries are not incorporated into use on helicopters. Cost would be the most obvious.
For example cell technologly, weighs the aircraft and gives a weight and CG readout in the cockpit. Nick informed me that this has been used on larger models.
Far fetched: golf balls have dimples on the surface to make them fly straighter, any good use for that concept in helicopters?
Would the shape of the vanes on the GE engines benefit helicopter engine performance?
http://www.geae.com/education/engines101/
Any ideas that are eating at you to get them into future designs?