learning lots, good thread guys.
Why not just simulate it with OpenRocket or Rocksim? Assuming the Rocksim file is accurate from Apogee's website...
22.1m/s off rod w 4x C6-7 and 14.5m/s w/ E12-6
422m Apogee w/ the cluster and 326 w/ the 24mm motor
View attachment 538406
Note to the OpenRocket folks -- Apogee had 4 individual motors which I just switched to a 4 engine cluster. For some reason it forecasts a lower speed leaving the launch rod and lower apogee. Should be the same as above, no?
View attachment 538407
My stock HiFlier XL flies really well on a D12-7, I can't imagine what altitude you could get by staging E motors. But then my stock XL might get similar altitude on an E30, but not as much fun.
Good call.I've gotten more paranoid these days with long burn motors. I've seen a lot of rockets take a turn right off the rod and go horizontal for long distances under thrust. I'll probably be overly cautious with mine.
Both Aerotech and LOC sell 1.9" body tubes and couplers for them. Since this is a Quest kit and Aerotech owns Quest, that makes sense. Ask Quest (Aerotech) what the ID of the coupler is, I'm sure they know.That 5 cm (1.96 inch) body tube still has me scratching my head. What the heck is it? And what would the inside diameter of the coupling tube be for that size BT?
Thanks.Both Aerotech and LOC sell 1.9" body tubes and couplers for them. Since this is a Quest kit and Aerotech owns Quest, that makes sense. Ask Quest (Aerotech) what the ID of the coupler is, I'm sure they know.
Unfortunately, on this flight, the chute failed ....
Reread how they “bound” the motors together. I suspect that left enough gaps that the pressure from the ejection charge(s) escaped without ejecting the parachute (possibly even the nosecone).How did the chute fail? Didn't deploy or ? Curious what delays the (3) motors were.
So.. to summarize... You can't fit (4) 18mm motor tubes into this coupler. Using a coupler as a quad motor mount will not work in this case.
How did the chute fail? Didn't deploy or ? Curious what delays the (3) motors were.
Triceratop...Yes, but I could fit a cluster of three 18mm. With room to spare. And that would still give me a swappable motor mount. I just have to sand down my centering rings on the 24mm motor mount to fit the coupler as well. Unfortunately, "Tri-Runner" is the worst of the names I had planned. Need a better word that means three. Maybe I'll call it an "III-Runner" and use Roman Numerals (although I think Apple has trademarked everything that starts with an "I").
Baby Trike!Triceratop...
Clustering is more challenging but not that difficult. The show of a big cluster with all the smoke and fire is always a crowd pleaser!While your math is not accurate I am completely with you on clusters be problematic and not worth the hassle. I have removed cluster mounts from a number of rockets including some early Estes pro-series in favor on a single mount. My own Quad-Runner was built with a single 24mm mount well before they started offering this as an option.
Absolutely build it as a single motor rocket and go enjoy it.
Triceratop...
Clustering is more challenging but not that difficult. The show of a big cluster with all the smoke and fire is always a crowd pleaser!
View attachment 544655
Enter your email address to join: