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Min Diameter builds. 38mm and 54mm
#21
I flew it on Saturday but I'm only getting around to posting now.

I decided not to bring my tower for the one flight and instead bought a set of fly away rail guides. They work great and I will likely be giving them a go for future flights in OTHER rockets. Due to the use of the rail guides on a rather heavily used rail, there was a lot of friction that may or may not be the cause of a loss of around 1,000' off the expected altitude.

The flight was a CTI G60 Red Lightning that had an expected altitude of ~5,200'. Actual altitude was 4,151'.

Other than the loss in altitude, the up part was nominal. After leaving the rail an rail guides behind, it did curve a small bit but flew perfectly straight after that. I lost sight of of it quickly after that and only spotted the tracking smoke which helped in determining when apogee was. That and the tracker suddenly got really loud.

The rocket came down quickly and unseen. When the tracker became quiet I knew it was down and headed toward that location. Once I made it to the other side oF AMW's RV, I spotted it on the field and went right there. Upon arriving I noticed the parachute still wrapped in nomex and one fin missing. The homemade cable cutter failed, but that can be attributed to a bad solder joint done at 12:30 the night before when all I wanted to do was sleep. The fin was found dug into the ground right next to the rocket with no damage. All I need to do is strip the epoxy of both the tube and fin, and re glue.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#22
Got a package from rocketry warehouse today. Got some fin material, a nose cone, and av-bay components for the 54mm rocket. Build coming soon

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#23
I spent a good portion of today sanding the nose cone shoulder and a couple of 54-38 centering rings. The centering rings are going to be used for holding the av-bay (38mm raven av-bay) in the nose cone shoulder. The deployment method will be the same as with the 38mm, drogueless at apogee with with cable cutter to release main. Recovery components will all be held inside the nose cone with the airframe break being between the nose cone and coupler used for the shoulder. The nose cone shoulder will be mounted to the airframe using coutersunk screws and pem nuts. I'm still trying to figure out how I'm going to attach the shock cord to the nose cone however.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#24
Yesterday I got to work making sure the nose cone shoulder will stay firmly in the airframe during flight and recovery.

Inside look:
   

And the countersunk screws, flush with the airframe:
   

I also coated the airframe with some west systems epoxy since I'm in belief that I didn't use enough when making the tube (I also recently did that with the 38mm too and was stunned with the results). The result is a nice smooth airframe that just looks nice.

Now unfortunately, my body tube is about the same length as a CTI 6XL casing, therefore there will be no L flights in this (not that there is waiver space around here for one anyway...). I will be limited to motors that fit in the 6 grain casing, a case I don't have. So instead I will likely be limited to 4 grain motors for the time being, but thats ok, my favorite motor is in that case.

I just printed out the fin template and marking guide. Very soon this will stop looking like a tube, and more like something that belongs in the air.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#25
Last night I was able to cut the fins out of some 1/8" G10 (I know, a bit overkill), bevel them, and tack them on with some CA glue. Then a quick assembly picture to get an idea of what it will look like.

Fins cut and beveled:
   

I didn't want to stand it up on the fins yet, so I used the nozzle of the K740 I've had all year to stand it up for the photo:
   

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#26
Spent the last couple of nights putting the fin fillets on. Going to get a shock cord and parachute tomorrow from AMW at the CMASS launch. Also going to fly skypunch tomorrow on an Estes E16, trying to get the parachute deployment to be successful.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#27
I figured an update to this thread is in order.

Last we looked I was getting ready to head to the CMASS launch in Amesbury, MA. That day was very, very windy. What rockets were flown, weather cocked severely. Any that didn't, had a looooong recovery walk, or landed in the trees.

I was on field on time for the club to be in the middle set up, which finished before I could park my car and unload my stuff (if you've ever seen CMASS set up you'd understand how quick they are). I payed my dues, grabbed some flight cards and started getting ready for a flight. About that time AMW showed up with their trailer full of goodies. I went over and helped them set up their storefront, and bought things. I got a shock cord for the 54mm MD (21' of 1/4" Kevlar), nomex for the same rocket, a pack of Estes E16-0s for the 38mm, and a K679 Red Rhino for my recently acquired 54/1750 AMW case (Thanks Dan Patell).

Next up came the flying, or attempts to. Like usual there were a lot of people taking long hard looks at my MD rockets (I brought the 54 too). Lots of questions were asked an answered while I wrapped enough tape around the E16s so they would fit into SkyPunch. Finally I had a couple of motors ready and a flight card, so I was on my way to fly.

The RSOs face was priceless when he assigned me to a high power pad (the usual mid power rail wasn't set up). Well I got the rocket set up and took note of the incredible amount of effort there was to get the rocket onto the rail, long story short, new fly-away guides that aren't deformed are in order. The LCO counted down and the E16 roared (or hissed really) to life. The rocket went nowhere.

The Raven was disarmed and the rocket was taken down. The LCO gave me my flight card back and I re prepped. This time I borrowed a launch lug from Jim Flis and taped it to the side. Went back and got the rocket loaded onto a rod and rearmed the Raven. That's when the wind picked up. The wind suspended flight opations for a few minutes while we waited for it to die down enough. I disarmed my Raven and held onto SkuPunch during this time. One launch operations resumed I reloaded an rearmed.

One the LCO got to SkyPunch, I was getting nervous wondering if I'd ever see it again. The E16 this time got the rocket airborne. About a half second after burnout however, we had an apogee event. The wind caused it to weathercock so much that the Raven thought it had apogee. The main parachute didn't deploy, this time there was no damage on landing.

Next up will be getting SkyPunch and the 54mm (now known as The Overthruster) up in the air in Berwick, ME. Their next launch is on November 14th, so I have a bit of time. SkyPunch will fly on a H120 Red Lightning, The Overthruster will fly on an I165 C-star, I'll fly my punisher on the K740 C-star that I've had since January, and if it's finished by then (which it should be) my Frenzy XL will fly on the K670 Red Rhino.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#28
Friday was a nice and warm day for late November in New England. Got a lot of painting done as a result. The Overthruster got a coat of white paint. It's pretty much done now as I wait for a decal from stickershock.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#29
Got my stickershock order in today, now The Overthruster is mostly complete. Just need to finish a couple av-bay things and this rocket will likely get off the pad sometime next year.

   

   

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply
#30
So I'm having some breakfast in Maryland today. Just mostly completed a 7 hour drive to Red Glare. Going to get my MD38 flown (hopefully) twice. First on a CTI J94 Mellow. Then on a CTI I216 Classic. Anyone at the event can feel free to come over and check this out. I'll likely have all my stuff set up near the AMW trailer.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
Reply


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