Activity

I wanted to say thanks to everyone. We had a GREAT Time at the launch!You guys know how to throw a good one!

OK – the window of opportunity is closing – I have to head to Longmont NOW. However, I’m only 25 minutes from Longmont and just 10 minutes up the canyon from Lyons. I’ll be home the rest of the day….   Read more»

I can drop it off today, later this morning. Call me, 303-823-5059. I have to head to Longmont and be back by noon or 1 at the latest.

I may need it Ed, I will let you know once I see Tim on Thursday. I really would like to find a 75mm 6000 case to use. I have one of my new motors in one of the cases…   Read more»

James,I have a 54/1400 case. I’ll look to see what nozzle diameters I have.The soonest I can get it to you is Wednesday.Ed

if it is of any help, I am in Longmont and work in Arvada. If needed, Warren could drop it off here (north side of Longmont, just off of 66) and I could take it to Arvada with me

What happened was the case got dinged on the rear end, so John had it cut down and new snap ring grooves machined. I have all closures and the nozzle. I’ve never flown it, but John said he has and…   Read more»

It is 1/4 shorter overall or the snap ring to snap ring measurement is 1/4 shorter? Do you have a closure as well and how will I get it from you?

I have a 75/6000 case I would gladly donate to the project. It used to belong to John Wilke and was slightly damaged so is 1/4″ shorter than factory new. I believe it only flew once.

Virga rain on the prairie.

Raining Continuously in Longmont. Two hours of moderate rain at 4:00AM (or so) and pretty steady light to moderate from 4:30 PM.Hope it’s hitting the Launch Site. Radar looks iffy…

Wait, wait, WAIT! My cast iron cornbread pan bakes my cornbread in the shape of ears of corn. What am I supposed to do with that? (Besides making it jalapeno cornbread with butter and honey.) And how is that going…   Read more»

Ken,One minor correction;

Remember, pie are square.

Actually, Pie are round, cornbread are square.(somebody had to respond)

When the Century Series jets were being developed, the jet engines were not powerful enough. So the aerodynamics were really important in that the jet could not use bulk thrust to force it’s way thru the sound barrier, the engines…   Read more»

But why is it that we tend to build “minimum diameter” instead of having a more optimized shape?

Supersonic flight is usually a consequence, not a goal in hobby rocketry.

Coke bottle shape? You must be from the Pepsi Generation?

FWIW, I suspect the single most significant aerodynamic factor for these types of rockets to be the frontal area and the associated drag. Consider a 3″ rocket vs a 4″ rocket on the same 75mm motor. All other things being…   Read more»

Bear is referring to what’s known as the “area rule” for high sub-sonic and supersonic aircraft//en.wikipedia.org/wiki/Area_ruleThis principle should apply to rockets as well, especially ones that make a significant part of their flights in the Mach 0.8-1.2 range. However, the…   Read more»

I will be the first to admit that I am not an expert on this topic, but as my father-in-law described it to me, (his credentials are that he worked for Convair (Consolidated Vultee) in the late 50’s and helped…   Read more»

Mike, that sure looks like a winning poker hand, got yourself a full house.