posted on Jun, 9 2019 @ 10:02 PM
I am getting closer to using a clear PVC pipe as a “vacuum” chamber. Until then.....
Estes 1/4A3-3T rocket motor against 5 HP Shopvac.
Picture below for scale.
1/4A3-3T size vs the A8-3 rocket motor used in the first Shopvac experiment.
For this experiment, I used an Estes Mosquito rocket and a 1/4A3-3T rocket motor. The 1/4A3-3T is what I think is Estes smallest engine in current
The 1/4A3-3T specs:
Total impulse: .625 N-sec
Max Thrust: a whopping 4.9 Newtons
Thrust Duration: .25 Sec
The 1/4A3-3T with its 4.9 Newtons out workers a 5 HP Shopvac to launch from a “vacuum” and lack of “back pressure”
The test was done twice. One flight with a blue tape band to hold the tube to ride the wire. The second flight was with a black tape band.
Picture of entire thrust of the blue band rocket flight consumed by the Shopvac
Link to the blue band flight video
1/4A3-3T Rocket Motor VS 5 Hp Shopvac - blue - right - short
Picture of the entire thrust of the black band rocket flight consumed by the Shopvac
Links to the black rocket flights
1/4A3-3T Rocket Motor Vs 5 Hp Shopvac - black - left side
1/4A3-3T Rocket Motor VS 5 Hp Shopvac -Black- right side
The 1/4A3-3T max thrust of 4.9 Newtons without hesitation takes off from the “vacuum” and “no back pressure” created by the 5 Hp Shopvac in
its suction hose.
Links to the A8-3 original flight VS 5HP Shopvac
A8-3 Rocket Motor Vs 5HP ShopVac two
A8-3 Rocket Motor VS 5HP ShopVac
Below is a diagram of the Estes rocket motor construction