This is going to help a lot of people who can't get these motors anywhere near where they live. Thanks Estes.Their website says these must be delivered via ground (FedEx) shipping, which is a little more than $10 to my house.
Not a bad deal!
Shouldn't that be waiving?
HAZ procedures are DOT regs. HAZ billing cost is what UPS & FedEx charge for complying with those procedures. Maybe Estes negotiated a reduced rate on HAZ shipments with a carrier. I know when I used to work for a company that shipped a lot, the price to ship UPS on their account was about half what I saw when I just went online and looked up the retail rate. It's entirely plausible that Estes worked out a good enough deal to waive it.
oops ... me ...I'd like to know how many shoppers only bought one or two packs of motors and didn't spend the "savings" on a kit or two right then.
I only bought a single pack of the -8 motors for my So Long kit. I bought 3 packs of the -4 motors for other kits, and a pair of E16-0/E16-6 to fly the So Long on windy days.So @ep29030 ... you must me the person who bought all 'my' F15-8 motors
The 8-sec delays are out of stock and unlike AT SU motors, I don't know how to safely remove the ejection charge from an Estes BP motor for my rockets with electronic ejection.
-- kjh( nor do I want to know how to remove the EC from an Estes Motor, thanks for asking ... )
Keep checking. They may add inventory quantities to the website when they get back to work in the morning.
Just a pet peeve of mine, without knowing how many motors have been flown the amount of failures is meaningless. If company A has 10 failures on any given motor and company B has 100, without knowing the total flown it's meaningless. Company A could have 10 failures in 100 motors and company b could have 100 failures in 100,000 motors, which is better? Not to mention MESS data is only useful trend tracking and lot marking as the vast majority of failures go unreported. Meaning it's only usefull if a bunch of one type of motor fail around the same time, then you have a batch production issue. Manufacturers can substitute motors sold for motors flown as those numbers are directly related even though they are not equal, and thus get useful information on failure rates, but is still affected by poor reporting rates.I think I want some !
But, what's the concensus on Estes 29mm BP Motors ?
Are they pretty reliable as far as CATO rates go ?
I've checked the MESS DataBase links from within the ThrustCurve.org > Rocket Motor Data search tool:
E16 - 22 Failures at ThrustCirve.org > Estes E16
F15 - 40 Failures at ThrustCurve.org > Estes F15
The number of failures don't sound scary to me but of course, it is the failure rates that matter, not the number of reported issues.
Thanks !
-- kjh( so ... Do I feel lucky ? Well, do ya, punk ? )
Vent the charge - either out of the rear if you're not flying minimum diameter (in which case you may get a little bonus impulse), or out of the side of the tube.The 8-sec delays are out of stock and unlike AT SU motors, I don't know how to safely remove the ejection charge from an Estes BP motor for my rockets with electronic ejection.
Interesting ideas, Stephen.Vent the charge - either out of the rear if you're not flying minimum diameter (in which case you may get a little bonus impulse), or out of the side of the tube.
Have you ever seen a rocket glider with soot-blackened holes on either side of the motor pod? Those are the ejection-charge vents.
Or fit a very tight removable plug into the front of a motor, preferably a -0. I've tried this without success so far, but I need to take another stab at it.
Stuffing a -0 with wadding and taping it over tightly is another commonly recommended trick. I've not had consistent results with that either. Need to try that again too. Will probably ground test either technique before I try flights with it again, as I had two mishaps in three or four attempts before.Interesting ideas, Stephen.
Definitely worth exploring, especially for when I fly Estes BP motors in my new BT-55 DD Rocket where some of their longest delays are still too short.
-- kjh
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