1. Samsulajojo

    Sold 75MM research snap ring casing set

    I have a complete set of 10 - 75 mm research snap ring casings. The longest casing measures 35” the shortest casing measures 14.5”. It also includes a case of nozzles, closures and snap rings. I never was able to get into research motors. With my time constraints buying motors is better for me...
  2. M

    BP engines specifically for swing testing

    So maybe this a problem no one besides myself needs solved but in all my years of rocketry I didn't think to do this until now. My dad was old school and wouldn't fly a design unless it passed a swing test and with very few exceptions I inherited this part of the hobby from him. (Yeah, I know...
  3. Mr G

    Where is your HPR sweet spot?

    What diameter rockets and motors do you prefer or fly most often? Choose what comes closest from the available choices. Select all that apply. Feel free to explain and add other preferences (e.g., cardboard vs fiberglass, DMS vs RMS, single vs dual deploy, etc) in your post.
  4. GaryT

    Found WANTED! 75/3840 Motor Compete:

    Anyone have an Aerotech, Dr. Rockets, Rouse-tech, Monster Motor Works 75/3840 Motor compete with Forward and Aft Closures and seal disk? let me know if you have one in great shape. Thanks Gary T.
  5. T

    Wrong Size fo M2020

    Hello, me and my team are preparing for a rocket competition. We were given 2 engine options for us to use in our rocket. First choice is M2150 and second choice is M2020. We have to draw rockets in for 2 options. No problem for M2150. But the dimensions of the M2020 are incorrectly given in...
  6. Hitman

    Thrust Vectoring Rocket

    Hi, I am building a thrust vectoring rocket that has a long duration of burn time. Can anyone provide me an alternative for Aerotech G8 or G11 motor since they are no longer on stock anywhere. Thanks!
  7. Co-leader of the LRP

    Motor Tube Length Question

    I have been wondering about the length of motors vs the length of the motor tube,e question being can you fly a motor that it shorter than the tube in it? e.g. Estes 24mm motors have 2 sizes, the D12 being 7cm long and the E12 being 95mm long. If I had a motor mount with 96mm between the engine...
  8. jbgust

    Finocyl, star and end burner grain now available on METEOR

    Hi, First, best wishes for the new year. Today I publish a new version of METEOR. You can now use many different grains configuration (hollow cylinder, finocyl, star and end burner). Let me remind you that: you can also use your own propellant. export the motor result in RASP format (to use...
  9. RocketEnthusiast101

    Whats the altitude achieved by each type of motor?

    Hi. After searching on google regarding this topic, I did find calculations regarding the altitude achieved by rockets but I couldn't find an exact link related to this topic. I do know that there are several factors influencing the altitude gained by the rockets. But, I just want a rough idea...
  10. P

    Motor Test Stand for M Class Motors

    How to design a rocket test stand for M class motors? I have searched a lot but I did not find any resourceful thread on high power rocket test stand. Just to give an example, I want to design a test stand for Cesaroni Pro 75 M 2020 Motor. Thankyou!. Any designs or links to other threads are...
  11. M

    Minimum Diameter Rocket Build - Motor Questions

    I bought a Madcow 54mm FW nosecone and darn it, it didn't fit in the LOC 54mm tubing I have. I don't want to sand fiberglass, so naturally, I decided to buy all the matching Madcow FW tubing and some G10 fins and make it a minimum diameter! I think I have an idea of how I'm going to do the build...
  12. dvdsnyd

    Sold Aerotech / Dr. Rockets 54/1706 Complete motor hardware

    I have a Dr. Rockets 54/1706 Complete Motor hardware set available. - Case - Fwd Closure - Rear Closure - Seal Disk Everything in Fantastic condition, minus a nick on the Fwd Closure. Blemish does not affect assembly of the motor in any way, and does not appear inside the smoke well of the...
  13. M

    Position of Igniter and how to make one?

    Hello Everyone! I am new to model rocketry and completely do everything on my own.So,got struck at a point Problem is "Does the position of Igniter really matter ?" I mean where should we keep the igniter is it at the opening end of motor or else some what deep inside the motor? Please help...
  14. Yukon@K-9 Rocket Tech

    9 Motor Cluster (with gimbaled center motor)

    Hi everyone! I have been developing a open source TVC system for model rocket. I then got a crazy Idea of clustering 9 motors. Of course I highly doubt I would attempt this anytime soon, But I was wondering if anyone ever clustered slow burn motors with normal motors. I made a rough CAD design...
  15. Daniel Maloney

    Best Fuel for Absolute Starter.

    What is a good fuel for a complete beginner rocket? One that can just be easily burned as a test motor. It will not be on a rocket so umm yeah...
  16. Y

    making rocket motors

    hello guys we are a rocket team from turkey and we want make a rocket motor and we dont know any thing about motors can you help us? it be like cesaroni l585 high power motor. what is the chemicals? is there any tutorial or like that? thenk you :)
  17. J

    KNSB Rocket Motor Nozzle

    Hi, I visited the site of Nakka Rocketry and tried to use an excel document to figure out the best shaped nozzle for my rocket, but it didn't work for some reason. Here are my rocket motor specs, maybe you can help me out with how to get the best nozzle design? - Motor case: 3/4 inch PVC...
  18. J

    Long Burning (7+ sec) PVC Solid rocket motor, around 8-12N thrust?

    Hi, I'm working on a project, to make a self landing hobby rocket, but with a solid rocket motor. I would like it to be a slow burnin one preferably with a stable thrust througout the burn time of it. I want to be able to make it at home (obviously I would order ingreedients), so that I can...

    Found WANTED Cesaroni 54mm 4 Grain Motor Case

    I am looking for a new or used Cesaroni Pro54-4 grain motor case, in good condition and clean. Thanks
  20. Gary Mac

    Loki M-1378 for L3 Cert Flight

    Any reasons why I shouldn't be looking at using a Loki M-1378 for my L3 cert flight? I understand it's a relatively new motor with a very high L/D ratio, so I'd enjoy hearing other's feedback on it. I like that's it's a relatively small impulse/high thrust design and also, after the L3 cert is...