Here is a good flight test to do. Do a 1-g power off stall (at a safe altitude so you can recover). Approach the stall as gradually as you can. It is more important to do it power-off than to worry about maintaining constant altitude as you approach the stall -- you are trying to simulate a landing flare flight condition. Now, here is the test: If you get to full back stick and it doesn't stall, then you don't have adequate elevator control authority. You should measure your control deflection and compare to the specs, and verify your c.g. is not ahead of the forward limit.
Having said that, my RV-8 with solo c.g. won't give a sharp nose drop either. At back stick it shutters a little and stays nose up, but the sink rate is over 2500 ft/min. The low aspect ratio wing just does not want to fully stall. But the RV-10 wing is higher aspect ratio. I did work hard to design in a gentle stall break, but it should break.
Some glider trainers, the G-103 in particular, are marginal on elevator power and won't do a full stall when approached this way, it will buck and shutter, but won't give a clean nose drop. So that level of control authority is apparently considered acceptable by certifying authorities, but I would prefer to see enough elevator power to get a nose-drop.
Please report back your results!
