Recent content by bestpa

Also, disclaimer, in no way is the number set I chose for acceleration real-world. An aircraft weighing 1000lbs taking 8 minutes to reach 80mph... I don't really think there's enough pavement ! ;)

I wasn't after things like drag, lift, prop effeciency, etc. Only acceleration. I feel confident that I have the answers I was looking for - this time! For the rest, I intend on integrating different polynomials. That's an issue for a different day! Thanks to all who responded.

Perl stores every number as a double, so I'm not worried about truncation. Here is the output using the lower acceleration (starting acceleration) within the speed slice of velocity: Slices : 9 , Time Calculated : 382.788798144722 seconds Slices : 90 , Time Calculated ...

Hey Jeff, how inaccurate do you think my method was? Do you really think we're talking about more than 10 second +/- difference with more advanced calculation techniques? I'm just going to use the method to eventually determine things like range, and runway needed until rotation (take off) for...

Thanks for you help everyone. Well, it looks like I won't be able to get my mathematical shortcut, but by writing a quick program to calculate using a different number of slices of velocity each execution, I should be able to see if using the average thrust will provide a sufficiently accurate...

Thanks for replying everyone, just a couple of things: I am looking to find the time to accelerate an object to a certain speed, where the thrust changes through the different velocities. 1) "Integral" thanks for your formulas, but I'm not trying to find the acceleration for a given velocity...

Thanks for responding but I don't really understand what you are driving at... The polynom describes the curve of available thrust over speed, but how do I integrate it into the equation? Can you write an equation for me? Please tell me that you are not suggesting I "slice" up each velocity...

Hi Everyone; I hope this is the right forum. Here's the issue... with fixed pitch propeller aircraft, thrust is not a constant, and changes (among other variables) with the speed the aircraft is travelling. The thrust available can be calculated using a polynomial. How do I integrate the...