5 reviews for A10-PT Engines

1. 

   Rated 3 out of 5

   Jonathan Charbonneau – January 11, 2022

   My question is this: How can the thrust duration be 0.8 seconds when the total impulse is 2.5 newton-seconds and the average thrust is 10 newtons? The duration in seconds must be one tenth the total impulse in newtons-seconds for the average thrust to be 10 newtons.

   • 

     estesrockets – January 13, 2022

     The thrust duration given by Estes in the A10 engine specifications relates to the duration of the total thrust that includes the peak and sustain parts of the thrust curve. The start and end points of the thrust curve, according to NAR specifications, are at 5% of the measured peak thrust. This system of measurement works for most Estes engines because the sustain part of the thrust curve gives a very significant percentage of the total thrust. The A10 engine, however, is a core burner where the sustain portion of the thrust curve gives a tiny percentage of the total thrust and considerably extends the engine’s measured burn time according to NAR specifications. Thus a more realistic measure of the A10’s performance is to only consider the part of the thrust curve before the sustain period and ignore the rest.

2. 

   Heidi – May 22, 2015

   Good for gliders or cars

   I like how these engines are plugged so you can put them in cars or gliders. I wish they made different sizes though.

3. 

   Jeff – May 26, 2013

   So Much Fun!

   Love putting these things in my estes rocket cars! Its so much fun to watch them zip around.

4. 

   Billy – June 29, 2012

   Great for Rocket Cars

   These engines are a lot of fun. You can have a lot of fun with them in the estes rocket cars

5. 

   Bear – January 1, 2012

   good

   I got some of these for the estes rocket car and it worked great!!