What is your unique build for 2020/2021?
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Bruiser
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Hmmn, well I don't know about the "something you don't see everyday" part but I am almost to the paint part of my own design 29mm Black Brant Vb that is based on Estes pro parts, 2.5 inch tubes and 45 inches tall.
I am deciding on my big build for 2021 and I think it maybe a 3 inch Patriot but I am also thinking of a sport scale Peregrine missile or an upscaled Arapahoe. They are all 29mm, 3 inch rockets made with pro series parts.
-Bob
I am deciding on my big build for 2021 and I think it maybe a 3 inch Patriot but I am also thinking of a sport scale Peregrine missile or an upscaled Arapahoe. They are all 29mm, 3 inch rockets made with pro series parts.
-Bob
1/4 Scale Viking 7 sounding rocket
I have decided that I have rockets in the build pile that will go super sonic, and run up close to the 20,000' waiver at the local Tripoli high power rocket launch site in North Branch Minnesota. I also have a 1/2 scale SLS ARCAS that I built and fly, the only thing out of place are the launch...
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I am still working on my 1/4 scale Viking 7 sounding rocket.
I am down to the final construction steps, then finish up work.
Covid19 restrictions at out local launch limited attendance to registered fliers only. So I lost ambition to finish and fly the rocket for 2020. It will be good to use the cold months here to get it finished.
Great question, I’ll have to get creative with internal mass arrangements. I think I’ll model it in OR this weekend and see where things fall to start.
I’m getting back up to speed after being out of rocketry for the past 15 years
I ordered the two smallest Thor kits from SBRocketry’s black Friday sale. I’ve always loved that design and figured a couple small rockets would be good to ease back into it
After those I have a Binder Design California Kid kit that Mike Fisher sent me as a thank you for finding his altimeter in the Oregon sagebrush way back when
Need to rebuild a few small rockets. I have a 4” upscale Super Big Bertha that is missing her little sister. Stripped the fins off at black rock. The parts have been in a box all this time
I ordered the two smallest Thor kits from SBRocketry’s black Friday sale. I’ve always loved that design and figured a couple small rockets would be good to ease back into it
After those I have a Binder Design California Kid kit that Mike Fisher sent me as a thank you for finding his altimeter in the Oregon sagebrush way back when
Need to rebuild a few small rockets. I have a 4” upscale Super Big Bertha that is missing her little sister. Stripped the fins off at black rock. The parts have been in a box all this time
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Actually starting on my 38mm MD Hi-Flier upscale. Lifes been rough since I first came up with the idea and its settling down to the point its feasible.
Here is something you don't see every day. Has flown successfully. It's 66 inches long, 56 ounces. On a 4" body tube and 8" styrofoam head. Has a 29mm x 15" motor mount. I call it The Tarantula.
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If I get to it, my unique build would be a Polaris A3 using engine-driven gas-dynamic (induction) stabilization, aka, finless. Would likely start small (13mm engine size). If that works as it should, then scale up to 18, 24 and/or 29mm motors.
Mugs914
"A crummy commercial..!!??"
I have a few projects to finish up first, but I have built several low power scale models of the Sprint ABM in the past. I'm planning on getting back in the Sprint business again...
Sprint missile...
The ones I did back when (over twenty years ago) ranged from 13mm to 24mm motors and were between 5" and 36" tall. The only one I still have is a boilerplate model about 15" tall for 18mm motors. It's pretty rough these days, but is still a good flyer.
I'm going to start with another 18mm version (I still have the patterns), but I really would like to do a large scale for high power.
Sprint missile...
The ones I did back when (over twenty years ago) ranged from 13mm to 24mm motors and were between 5" and 36" tall. The only one I still have is a boilerplate model about 15" tall for 18mm motors. It's pretty rough these days, but is still a good flyer.
I'm going to start with another 18mm version (I still have the patterns), but I really would like to do a large scale for high power.
If you can get that look and acheive that perfect exhaust plume that will be awesome!
Michael Wilson
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Make a larger version and put it on a J1799 for realistic acceleration too
I'm planning a 54mm to 54mm minimum diameter 2 stage.
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I haven’t built anything in 2020, but I’ve ordered some hot wire foam cutting tools, and I’m looking forward to some unique sci-fi style projects in 2021.
Mugs914
"A crummy commercial..!!??"
Well, that is kind of the plan...Make a larger version and put it on a J1799 for realistic acceleration too
My current OR plan is for a 5" version, about 32" LOA, with a 32mm mount. With an H669 it gets off the pad at133g. If I recall, the real one only went off at 110g.
I suppose I'd lose mission points for that....
Being a high-drag shape, apogee is only 1525 feet, Vmax says Mach .93.
If I could get ahold of an H999 it gets off the pad at 173g., Vmax Mach 1.13, apogee 1722ft.
Hmmm, A teleport launch with a Mach one flight all under 2k feet. That'd be pretty fun...
...if it survived.
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Not truly "Unique" since it is so old but I have the remnants of an Estes Venus Probe.
I think I won it for some contest and initially thought it was stupid so it sat in the box for a long time.
Maybe 8-10 years ago I was bored and built it then flew it.
I was impressed that it actually worked as designed (except for the MMT modification I made).
I think second or third flight I had on of those Estes "E" motors blow through (CATO) the forward bulkhead on boost and torch most of the rocket. Same thing happened to my kit-bashed Mercury Redstone. That fared better but the landing was poor and it broke the escape tower.
I think I still have the Venus Probe lander in the basement.
I might "fix" that over the winter.
I think I won it for some contest and initially thought it was stupid so it sat in the box for a long time.
Maybe 8-10 years ago I was bored and built it then flew it.
I was impressed that it actually worked as designed (except for the MMT modification I made).
I think second or third flight I had on of those Estes "E" motors blow through (CATO) the forward bulkhead on boost and torch most of the rocket. Same thing happened to my kit-bashed Mercury Redstone. That fared better but the landing was poor and it broke the escape tower.
I think I still have the Venus Probe lander in the basement.
I might "fix" that over the winter.
Looking forward to seing that one! It'll be a real challenge to stage without electronics for the airstart
Calling @hcmbanjo Unless I'm mistaken (again) he entered it for Scale competition and is acquainted with the stability challenges of that airframe
A sincere good luck with the scaling. My BT-60 18mm Great Big Inductor (GBI) worked pretty well (except on a D10 composite), but the BT-80 24mm version has not faired as well. I'm thinking the increasing mass and moments of inertia overwhelm the motor induction, and it remains to be seen if composite motors are even suitable for GDS
I'm not much of a scale builder, but I do have an estes Masters Series Mercury Atlas that is getting closer to the front of the build queue, plus the Skylab that jsut arrived got added to the list.
Additionally I've got a relative-scale 2.6" PAC-3 and 3" PAC-3 MSE to match my L1 4" PAC-2. I'll be using BlueTube and Canvas phenolic respectively to try out those materials
Additionally I've got a relative-scale 2.6" PAC-3 and 3" PAC-3 MSE to match my L1 4" PAC-2. I'll be using BlueTube and Canvas phenolic respectively to try out those materials
axonterminal
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I'm cooking up a 1:9'ish scale Iranian Zolfaghar. 2.6" diameter, 44.6" length with a 29mm mount. She will dwarf the 30" Fakour-90 (Iranian Phoenix). Unfortunately, it was on the losing end of a D10-3 cato. Lovely sight however.
CoachSteve
Well-Known Member
I just finished this low/mid power one last week - haven't seen too many builds like this :
Full Balsa rocket
:Full Balsa Rocket
I have not done a build thread in a while so I thought I would try something a little different. Its probably been done before but I am enjoying the project :) 3" 24mm low power rocket made from as little cardboard as possible. Here is goes First is the airframe start with this Use this to...
www.rocketryforum.com
Full Balsa rocket
Funkworks
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I'm not but the little blue folks are making an updated version of theirs:
They're hoping the nose cone to be done by the end of the year. I've been reporting on their progress in the "Scratch Built" sub-forum not too far from here.
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PeterAlway
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Not building things, but drawing them:
PeterAlway
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And another little art project:
I roughed in a OR simulation for it last night at full scale and needed a steel nose cone tip and 20kg of additional nose weight to get it stable with no engines. Total sim weight 110kg.
Need to scale down to something more practical and will likely need to work off the mid body motors only, foregoing the primary motors at aft. That is, unless I can find some alternative solutions.
Mugs914
"A crummy commercial..!!??"
The BP versions had a HUGE exhaust plume (for BP) due to the recessed motor! It wasn't that dense of course, but it was every bit as big as the base of the rocket. Sounded weird too... I think the mid/high power versions would be pretty spectacular on White Lightning propellant!
The operational Sprints were launched vertically from a silo. They were basically blown out of the silo by a gas charge and ignited the first stage as it exited the tube. It would then make an abrupt turn in the direction required and accelerate to Mach ten or so in the low atmosphere.
Awesome beast...(Yes, it has occurred to me to launch one from a tube... One step at a time!)
This vid has some cool footage:
