the engine is D12 7cm length, total pulse is 20N-sec , maximum lift Wt is 283g, maximum thrust is 32.9N, thrust duration is 1.6s, initial weight is 43.1g.You have not been impolite. However, I still need to know more information about your rocket to help you. For example, what will the diameter of the motor be? Also, what will the diameter of the rocket's airframe be? How powerful are the engines you plan to use?
that's cool, thx, and my E-mail address is [email protected]Hi! Happy you are here for knowledge. If you take time to look around all your questions can be answered. If you speak Mandarin, maybe I can get my son to come over and help translate. Rockets are a fun hobby and there is some learning about the basics. I would send you over to Apogee Components and their excellent website that condenses and puts very simply what maybe hard to find here (but it IS here) There are also lots of video presentations to help by showing you components like engine mounts and how our hobby rockets are made. Come back to The Rocketry Forum if you get confused or we can answer your questions once you've looked over what Apogee offers. Be aware some vendors do not ship overseas and some items are restricted, but mostly what you will need are the basics and you should look in the Vendors thread to see who is advertising what you will need. I recommend a small Estes kit first to get familiar with the basic construction of a safe rocket. All the stability and recovery work has been done for you and the pictures usually need no translation. Hope this isn't too long or hard to translate, but you are on your way! Again. Welcome to the site and I'm sure my esteemed fellow rocketeers will be more than helpful in your future endeavours. Straight smoke and good chutes, my friend! -Dave-
what about centering rings? how to make a handmade one?D12s are 24mm motors. Find a 24mm kit that fits the diameter of the body tube.
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