- Joined
- Jan 18, 2009
- Messages
- 331
- Reaction score
- 137
There’s Apogee’s E6 and F10s. 6 and 7 sec burn times.Thanks, but I was hoping to see some FG model rocket motors.
Maybe Aerotech could consider FG reloadables that are long thrust motors?
There’s Apogee’s E6 and F10s. 6 and 7 sec burn times.Thanks, but I was hoping to see some FG model rocket motors.
Maybe Aerotech could consider FG reloadables that are long thrust motors?
End burning motors don’t work well with standard RMS forward closures. It is possible to engineer something that will work but that would be aways off, given our other priorities right now.Thanks, but I was hoping to see some FG model rocket motors.
Maybe Aerotech could consider FG reloadables that are long thrust motors?
More details and picturesM4500 to L1000. Hell yeah! The boost was awesome, sustainer failed to ignite, mechanical failure in the sustainer.
Next time!!
Wrap some masking tape around the delay so it's snug - not - tight, then assemble. Use the instructions that came with the motor and make it the old way.I have an old J180T-M, that I wanted to convert the delay to long.. I ordered a pack of RDK-30 plus that's specifically lists only the J180T-L on the front.. the main issue is the diameter of the old delay grain is larger than the RDK30 and the RDK30 is very loose inside the phenolic delay liner provided with the kit...do I need another cardboard delay liner to snug it up? This old kit has the 2 inner and outer delay orings and delay backup ring (plus an old copperhead ignitor). No date codes on the paperwork.. thank you
Student project. I don't have pictures or videos yet. The sustainer igniter failed to light the L1000. We found it cracked. We've had a few of those do that on the pad. Electronics were all in working order. The sustainer free fell, but the electronics deployed the main at 700' and suffered no damage. Booster was recovered by shovel. The boost from the M4500 was epic.More details and pictures
You found *What* cracked ? The motor case ? The nozzle? Epoxy joints? What was you initiator?
It sounds like he is referring to the standard AT dipped pyrogen ignitor head. The pyrogen can crack/split/crumble depending on how it is handled.
Though, I would seriously question the OP's use of a wire-wrap ignitor for second stage ignition. When you factor in the expense of a 3 grain 98mm ST reload and an L1000, coupled with the complexity of staging. I would ask, who is the mentor or the one guiding the decision making process on this project? Obviously there are some semi-deep pockets on this team given the aforementioned motors. Generally (actually more than generally), a high current ignitor (wire-wrap being one of them) is rarely if ever chosen for sustainer ignition as its ability to reliably fire and not brownout the avionics is well known to be questionable at best. E-matches or another means of low current, fast acting ignitor is used by experienced users nearly 100% of the time.
100% we had a team fire a sparky motor in the sustainer of a two stage this past season using an augmented ematch. Hands down the way to go.E-matches or another means of low current, fast acting ignitor is used by experienced users nearly 100% of the time.
At NSL West, I saw the new 98/20480 case.....a true beast of hardware.
Somehow, some way, I need to make one of those mine.
-Kevin
100% we had a team fire a sparky motor in the sustainer of a two stage this past season using an augmented ematch. Hands down the way to go.
Ah, sorry about that! This wasn't mine.. it was a student project. I was just there flying with our club! The igniter that came with the motor cracked. It wasn't secured in the motor. That M4500 is no joke, and I can see the acceleration from that motor forcing the igniter down the grains and causing it to crack....You found *What* cracked ? The motor case ? The nozzle? Epoxy joints? What was you initiator?
Yes, AT igniter. The rocket wasn't mine. It was a student team. Apparently they didn't secure the ignitor in the grain and it shifted and broke. I've seen them crack on the pad before. Personally, for an air start, I would have used something different! Their rocket was beautiful and the quality of the build was very nice.It sounds like he is referring to the standard AT dipped pyrogen ignitor head. The pyrogen can crack/split/crumble depending on how it is handled.
Though, I would seriously question the OP's use of a wire-wrap ignitor for second stage ignition. When you factor in the expense of a 3 grain 98mm ST reload and an L1000, coupled with the complexity of staging. I would ask, who is the mentor or the one guiding the decision making process on this project? Obviously there are some semi-deep pockets on this team given the aforementioned motors. Generally (actually more than generally), a high current ignitor (wire-wrap being one of them) is rarely if ever chosen for sustainer ignition as its ability to reliably fire and not brownout the avionics is well known to be questionable at best. E-matches or another means of low current, fast acting ignitor is used by experienced users nearly 100% of the time.
to true, to true…Somehow, some way, I need to make one of those mine.
Have 2. Here's a static fire of a N1000 D grain in one.Rumor has it, someone we know has one......
@jd2cylman any idea who we know that has one of these bigboys??
So, they were trying to air start a first fire igniter? eek...no wonder it didn't work...lolYes, AT igniter. The rocket wasn't mine. It was a student team. Apparently they didn't secure the ignitor in the grain and it shifted and broke. I've seen them crack on the pad before. Personally, for an air start, I would have used something different! Their rocket was beautiful and the quality of the build was very nice.
Rumor has it, someone we know has one......
@jd2cylman any idea who we know that has one of these bigboys??
That's the smallest can of Rust-Oleum I've ever seen! Did they make that in a 'party' size, to put on a cake or something?I love GOLD . Im ready to party.View attachment 647610
Looks like the J180 you have is from the Pre RMS+ Days, so the delay parts are NOT compatible with a RMS+ Delay Pack. Contact Aerotech and they should be able to get you the correct Delay Liner, o-ring, and spacer you need to use that old motor. OH I remember the two o-ring system.I have an old J180T-M, that I wanted to convert the delay to long.. I ordered a pack of RDK-30 plus that's specifically lists only the J180T-L on the front.. the main issue is the diameter of the old delay grain is larger than the RDK30 and the RDK30 is very loose inside the phenolic delay liner provided with the kit...do I need another cardboard delay liner to snug it up? This old kit has the 2 inner and outer delay orings and delay backup ring (plus an old copperhead ignitor). No date codes on the paperwork.. thank you
They are all the same.hey Gary and friends, do all of the 38mm DMS motors use the same printed thrust ring? I don't see the dimensions of the OD and length on the RCS drawings for the H45W. I do have a J425 that I can measure the thrust ring on, if they are all the same.
Thanks!!
Thanks!They are all the same.
They are shipping in starter sets now, I'm not sure when they will be available for individual purchase, and I will have to inquire about the thread size. Just guessing, 0.75mm x 0.25mm.I saw the post on Facebook about the two-part stainless 1/8” launch rods with threaded interconnect. When will those be available? Is the thread a standard size?
Those look great! I look forward to their availability.They are shipping in starter sets now, I'm not sure when they will be available for individual purchase, and I will have to inquire about the thread size. Just guessing, 0.75mm x 0.25mm.
View attachment 648443
Enter your email address to join: