I read a book by Dave Patrick, in which he asked several people how to Lomcevak. Not one said that models couldn't do one. Advice on the maneuver is given by, Dave Patrick, David Von Linsowe (TOC Pilot), Clint McHenry (full scale aerobatic champ, PAC instructor), Tim Nealy (full scale champ), Jim Stanton (PAC intstructor), John Conrad (adviser to US aerobatic team), Joann Osterud (full scale Ultimate pilot), Wayne Handley (needs no introduction here). These pilots were giving DP input on how to get models to do a Lomcevak. Again, none said that models won't do one. Several did say that the plane ends up in a flat spin or outside spin. None said KE spin.

Clint McHenry(full scale aerobatic champ, PAC instructor), even stated that a KE spin counts as a Lomcevak, only is is on a downline.

The phrase gyroscopic maneuver is used twice, and neither time does it relate this to big planes at all, just that a Lomcevak is a gyroscopic maneuver, and that Wayne Handley is a recognized authority on gyroscopic maneuvers.

Reference "Raido Control Aerobatics For Everyone" by Dave Patrick page 42 through 44.