T34zac
Well-Known Member
Would it be possible to make a "cluster addition" tool? To get a thrust curve for a combination of motors for a cluster rocket. Similar to this tool:https://www.rocketreviews.com/combine-motors.html
Yes, it would be possible. What would it do that the one you linked doesn't, though? Plus, RockSim and OpenRock both have the ability to specify clusters and staging already.Would it be possible to make a "cluster addition" tool? To get a thrust curve for a combination of motors for a cluster rocket. Similar to this tool:https://www.rocketreviews.com/combine-motors.html
Well ease of use on that tool leaves something to be desired, finding the right motor is like trying to find a needle in a haystack. Both OpenRocket and RockSim handle staging and clusters nicely, but it would be nice to have a quick and easy tool for getting a thrustcurve and total impulse/thrust for a clustered or staged rocket.Yes, it would be possible. What would it do that the one you linked doesn't, though? Plus, RockSim and OpenRock both have the ability to specify clusters and staging already.
True; a thousand items in a drop-down box isn't easy to use.Well ease of use on that tool leaves something to be desired, finding the right motor is like trying to find a needle in a haystack.
So it's the thrust curve chart and stats that are most valuable?but it would be nice to have a quick and easy tool for getting a thrustcurve and total impulse/thrust for a clustered or staged rocket
OK, that should be fixed now; sorting is smarter about embedded numbers (all numbers actually).One extremely minor thing that I've noticed is that in the motor browser, motor cases seem to be in alphabetical instead of numerical order.
Thanks; I fixed it. Maybe I should add a "report incorrect info" link on the motor pages.I did notice that the Loki G94 is listed as for the 38/240 case, but it is actually a 38/120 motor. Is there a better place to report minor issues like this?
Drag is going to scale roughly with frontal area, which is going to scale with the square of the linear change. So a 4" rocket is 1.333 times wider, which means it will have -1.777 times more surface area and drag.I have a question. I'm looking at the difference in altitude for 3" vs 4" rockets. For example a 3' at 80 ounces on a J425 goes to almost 3700' but a 4" of the same weight and motor only makes 2700'. Is the drag of a 4" that much greater. I find the altitude difference hard to understand. How about a little enlightenment.
thanks. I read it and some others.Plus, drag is proportional to the square of the velocity, so you'll see much bigger effects in motors that push the airframe faster.
I wrote this article on flight physics if you're interested in the details.