Engines (Motors): B6-4 Only
that looks good, does anyone know the motor size, looks like it could be 24mm
According to the NAR data sheets, the B6-4 weighs 17.8g while the C6-3 weighs 24.3g. According to Quest, the rocket alone weighs 5oz, i.e. 142g. That's about 4% difference. If that's enough to make the model unstable, I'd be concerned about any such model built by the sort of consumer who buys it from Wal-Mart and can't figure out where to get a B6-2.It is listed as B6-4. I asked about that motor choice since it is a fat and draggy rocket and HEAVY. I suggested a B6-2 and I asked if the C6-3 was not recommended because of stability. The response was that the C6-3 weight did cause stability problems, so I would *NOT* recommend trying anything heavier than a B in this model - that includes BP C motors and composite D motors. The answer about the B6-4 was that they simply don't sell B6-2 motors to retail stores, so recommending a motor that the consumer cannot get would be a bad idea.
The thrust/weight ratio of a 5oz rocket with a Quest B6-4 is a little under 4. Normally I'd be the one saying that launching a rocket with a thrust/weight ratio of 4 is fine and you'd be the one saying it needs a 6' rod. Mind you, even I wouldn't put a B6-4 in such a rocket. Quest can say what they like; speaking as an RSO, I'd be very wary of letting someone launch this on a B6-4 and at the very least would declare it a heads up flight...Hopefully this model can get off the normal launch pad launch rod at a good speed and reach an altitude where the parachutes can eject and inflate using a B6-4.
Enter your email address to join: