On Oct 2, 12:25 am, "B.C. MALLAM" wrote:
I fly a 1/4 scale radio control model F4U and it had the same problem of an
abrupt stall and roll. A vortex generator solved the problem and now it
stalls like a trainer.

Interesting. A vortex generator works by delaying a stall wheras a
stall strip works be inducing a stall.

Can you tell me what direction your propellor rotates (viewed from the
rear) and what side you have the vortex generator (viewed from rear).

Do you know if the wing section is NACA 5 digit to scale or a special
model type.

Due to their small size airflow over small wings tends to be laminar
over much longer part of its length.

(Hence insect wings are thin and due to testing on too small a models
WW1 fighters were too thin as well)