Hi Walter Apologies Dirk, I didn't realize the second language thing. My bad. The good news is that I think we have consensus that stiffness is the primary factor. If tension is a factor we can say it is minor. I suppose if we subscribe to the himps being waves then tension would be a requirement. N...

Hi Vice More energy is required to manoeuvre or be manoeuvred by external forces when you are heavy, by reducing mass less energy is required to accelerate, decelerate or turn. Dependant upon how you arrange your C of G, you can also get the desired Angle of Attack to enter the designed flight regim...

Hi Vince

Only if you watch casting videos on rewind

So does the relative velocity direction of the fly leg's mass discharge matter or not?

Cheers,
Dirk

Sorry Dirk, Too many compounded negatives in that statement for me to follow at this time of day. Sorry Walter, that was in anticipation of too many erroneous and compounding possible positives in interpretation. Say the loop is exerting pull on the fly leg on this board and the next thing the loop...

Hi Vince Sorry about the delay in answering your questions but I wanted to come back to the Erm Rocket equation and look at some practical difficulties of analysis No problem, take your time, I have patience. After all I used to fly hang gliders, not sailplanes… The Erm was on the direction of the r...

Hi Vince So we agree that by reducing mass, we are increasing the time of flight. If orientation, size and shape in relation to air drag remain the same, yes. Still don't see how that would "preserve fly leg velocity". Going back to the rocket equation, what is the difference between an ex...

Morning Vince What does a pilot change when he dumps ballast to either obtain longest time of flight or fastest to distance? Dumping ballast lowers wing loading, which does not help speed up anything. Fastest time to distance is helped by adding ballast. Longest time of flight can be helped by dumpi...

Hi Walter So if there is tension how does that create the dolphin nose? Tension pulls things apart, it doesn't squish them together. Does the tension go away when the loop is larger because the dolphin nose doesn't appear in larger loops according the previous couple of posts by Vince and Dirk? Sayi...

Hi Vince Not the same, OK thanks. Can you expand please? What happens when the hydraulic fluid is dumped? how does a glider achieve those flight properties by dumping ballast? Sailplanes take on water ballast stored in tanks (up to 250 litres) in order to raise wing loading, which results in everyth...

Hi Vince What you describe sounds like dumping ballast with sailplanes? There the aimed result of dumping is slower air speed at best glide, best climb and stall and also a better climb rate in thermals. What is the aimed (energy management) result of mass dumping with boost-glide vehicles? Or how d...