Pure coanda thrust, great job! I'd love to see a demonstration with smoke. What fraction of the air flow do you think is being utilized(staying along the surface to produce downward thrust)?
I might be wrong, but another way to improve lift would be to change the shape from spherical to friz-by or frying-pan. Simply put, a flatter shape will produce more force lifting up. On spherical shape, after 45 degrees air pressure is pulling more and more horizontally. Actually, just buy a good plastic friz-by and put the motor in the same place.
What would happen if a shaped cover was placed over the top fan to direct airflow in a more stable pattern? Would this help or would it de-stabilise the coander effect?
Your research and experiments are fascinating since you're doing it with practical and theoretical modelling.
Ways to improve on this version; one would be a better engine (less weight, more power). Then it would be able to lift its weight and fly! But putting batteries/fuel on board would make it too heavy again. For efficiency, a "vacuum cell" around the top might be key (with a vortex ring inside), but that isn't easy to construct and the control over the velocity of the air jet becomes very critical.
Pure coanda thrust, great job! I'd love to see a demonstration with smoke. What fraction of the air flow do you think is being utilized(staying along the surface to produce downward thrust)?
tpm302 1 month ago
I might be wrong, but another way to improve lift would be to change the shape from spherical to friz-by or frying-pan. Simply put, a flatter shape will produce more force lifting up. On spherical shape, after 45 degrees air pressure is pulling more and more horizontally. Actually, just buy a good plastic friz-by and put the motor in the same place.
COROVICD 4 months ago
Clever prototyping
1BustedMyth 7 months ago
interesting test. I have considered a similar design. I wonder why it is so inefficient. deserves further study
DanFrederiksen 7 months ago
What would happen if a shaped cover was placed over the top fan to direct airflow in a more stable pattern? Would this help or would it de-stabilise the coander effect?
Your research and experiments are fascinating since you're doing it with practical and theoretical modelling.
TK42138 8 months ago
Nice video, well made & very interesting stuff, thank you.
Thom in Scotland.
fuelban 10 months ago
MUY BUENO GRACIAS POR COMPARTIR
wwwGUSTAVOSOLANOcom 10 months ago
MUY BUENO AMIGO
ICALNESCORP 10 months ago
what it this for exactly?
jmantheburninator 11 months ago
Cool!!!
kaltiki2000 1 year ago
thanks
best greets from germany.-ecco
ecco1347 1 year ago
Beautiful design, I was wandering if there is a way to get a light weight energy device to feed the engine without external cables
SEKILIN 1 year ago
@SEKILIN,
Ways to improve on this version; one would be a better engine (less weight, more power). Then it would be able to lift its weight and fly! But putting batteries/fuel on board would make it too heavy again. For efficiency, a "vacuum cell" around the top might be key (with a vortex ring inside), but that isn't easy to construct and the control over the velocity of the air jet becomes very critical.
Trebseig 1 year ago
very good tests on coanda effect! bravo !
gilbondfac 1 year ago
@gilbondfac,
Thank you :-)
Trebseig 1 year ago