From: nospam@127.0.0.1   
      
   On 2/18/2021 12:26 PM, Douglas Eagleson wrote:   
   >   
   > Thanks for all the reply's.   
   >   
   > I will go with the Balls event and get the official approvals.   
      
   I would sign up for NAR, and any chapters that are local to you first.   
   Get to know some people first, esp. the folks who organize BALLS. Make   
   sure you get all the needed certifications first, and have a signed up   
   slot, rather than waste a trip.   
      
   >   
   > If I make a test engine mounted on a bench do I need   
   > approvals?  I would of course reach out to an expert first.   
      
   Depends a lot on the state you reside. Some states no. Some states (like   
   CA, yes). Reach out to the arocket list and ask. Um. Very much recommend   
   for a large rocket you do these tests outside and isolated, far away   
   from people and dwellings, esp. your own if you want to retain your   
   homeowner's insurance policy in effect. Depending upon the materials in   
   use you should be familiar with all the hazmat procedures for safe   
   handling. A basic understanding of the physics of combustion and rapid   
   oxidation wouldn't hurt either, so to speak.   
   >   
   > The experts on the Inet mentioned the choice of fuels.   
   > Why use anything but the safe fuel.  I think this refers   
   > to a sucrose based fuel?   
   >   
      
   Anything that can rapidly oxidize is hazardous. Even CO2 rockets can be   
   injurious, even lethal if they are allowed to build up enough pressure.   
   Know and understand what you are using. If you are unsure, and   
   *especially* if you are sure, seek out the advice of others first.   
      
   Dave   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)