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How close to the ground will that F/G pyramid be when the ejection charge goes off on each of those recommended motors?

-Fred Shecter NAR 20117

off on each

The G will get to 300-400 feet at apoggee. The F seemed to get to 200-300 feet (heavy rocket). The ejection charge height less than that ( no altimiter so no exact numbers).

Angelo Castellano Sunward Aerospace Group Limited

email address on web site

I asked because if the rocket only gets to 200 or 300 feet apogee, and with a saucer/pyramid that is basically at motor burnout, then the rocket will descend very close to the ground by the time motor ejection occurs. This can cause fires.

Fires are bad.

Very bad.

if you fly on a dry lakebed, then you may not be concerned about this (unless the rocket is approaching your car when ejection occurs).

That is why on regular Model Rocket sized saucers (like the Centuri or Estes or Quest) they use booster motors or on the newer versions from Flis they use either booster or plugged motors.

Have you considered this hazard?

-Fred Shecter NAR 20117

descend very close

Fred, the good news about these draggy rockets is that they quickly reach a rather low terminal velocity, so they don't fall nearly as fast as a 3FNC model. While a short delay may be three seconds too long, the rocket will still be high enough up to eject safely. Now I wouldn't recommend the use of a long or XL delay in a rocket like this...

Yes, I knew that, but the tremendous delay afterburn lasts for a while after the ejection charge has gone off.

Problems could include:

1) Motors ejecting and hitting the ground while hot or flaming (that should be prevented in the design and flight prep). 2) rocket landing while the delay afterburn is still going like a blowtorch. 3) Ejection low enough that ejection "particles" (flaming bits) hit the ground.

I understand that saucers and their close cousins are a religious fanaticism for some, but NOT setting fire to launch sites is also a religion for others.

-Fred Shecter NAR 20117

descend very close

Yes they are.

During testing, I didn't find any problems with a fire hazard. Both pyramid kits are Level 4. As for dry areas, extra care should always be taken.

To add an extra degree of safety, I will add a small warning to the website for both rockets and will mention the potential in kits as they are produced.

Angelo Castellano Sunward Aerospace Group Limited

email address on web site