- Joined
- Aug 25, 2019
- Messages
- 6,206
- Reaction score
- 4,397
Just curious:
Would VMax be fast enough to use for an endburner of any size?
Would VMax be fast enough to use for an endburner of any size?
You are correct - Warp 9 never had a delay function. I am not fond of the fact that this decision was based on a drag race (which over the years have been slowly going the way of the Dodo). I was just peeved as (like the switch decision) was sprung on the flying community with no advance warning and did not seemingly have any test data to back it up. TMT/S&T could have easily done some testing here before stranding people. I used mine up in BP clustered rockets depending on the BP motor to handle the deployment (Viper IV with 2 D12 and two E75).
The J1799 is a 3 grain motor while the K2045 is a 4 grain motor. I've flown both. Warp 9 is .5 sec, SuperThunder is .7 sec, both in 54mm.No , the J1799 does not kick harder then the K2050. It has similar peak thrust , but no where near the total thrust or average thrust.
Not just the drag race, but multiple reported delay failures. When 3 out of 11 Vmax delays snuff in a drag race, that’s not enough for you?
It seems you’re more upset they didn’t consult you before making the decision.
https://www.rocketryforum.com/threads/vmax-psa.134332/
No , the J1799 does not kick harder then the K2050. It has similar peak thrust , but no where near the total thrust or average thrust.
Have you flown all of them?
I bet some armchair engineers think the N10000 and O3400 are rougher than the N5800.
So by your "armchair engineering standards"
CTI apparently felt that determining the root cause and correcting it would cost more than the lost revenue from just ending the line.
Yes I have flown them all . I also have data that clearly shows the J1799 does not "kick" harder then a K2050 .
The N10,000 has more average thrust then a O3400 or the N5800 . So by your "armchair engineering standards" , yes the N10000 is "rougher" then the O3400 or N5800 . If you would like , thrustcurve.org is a wonderfull tool to actually see what motor "kicks harder".
I know all about thrustcurve.org, thanks. Care to explain why a K261 comes off the pad so much harder than a K250, when your data source and analysis disagree?
That is not what I was told, but I am not interested in getting into it publically.
Transparency is crucial and I’ve tried to help that by being accessible and by answering questions, but directors, who are elected by the members, and committee chairs, who are approved by the directors, must sometimes make difficult decisions to protect the hobby, the association, and the membership as a whole. When a risk is identified, deferring those decisions exposes the association to additional liability. We can always revisit a decision. And we will make mistakes.
Steve, I give you credit for being as transparent as possible. As I noted, I would have been completely happy had the BOD simply alerted us there was a potential safety issue at hand and was under consideration. The board would have had the benefit of wide scale input from the community to, perhaps, make a better (or at least better informed) decision.
As far as I know, I can’t look somewhere and find supporting data for the VMAX decision and it has been years. What got my goat was a member of S&T telling me that I did not need to know why, the matter was not up for discussion, so just live with it.
The K261 does not come off the pad as hard as a K250 , you are throwing stuff at a wall trying to see what sticks . The K261 has a slightly higher average thrust , but total impulse is far lower , and the peak thrust is lower . Next question ?
I don't. Send me a PM with the info, won't disclose it publicly.A few of us have a very good idea why the V-Max reloads are not being made any more. But the fact is CTI made that call and it's totally up to them.
You got me there. I don't do short stubby rockets... although I'd love to get an 8" Gizmo.Not moot at all. Short stubby draggy little rockets and Vmax motors are like peas and carrots. There is plenty of delay for them. I can't tell you how many F120 and G250's I have pumped through an Onyx. Match made in heaven. Heck, even the H410 delay had to be drilled.
No, I am not throwing stuff at a wall. The subtlety may be lost on someone looking to argue, but I carefully chose the original words to be subjective, specifically to avoid a pissing match. Epic fail there, i guess.
For flyer's education purposes, would you explain your original point regarding the K261 and K250?
Enter your email address to join: