The_Quacken
Well-Known Member
- Joined
- Apr 16, 2022
- Messages
- 110
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Hey all,
so recentley due to my weakness for buying new kits I picked up a 2.2 inch tomach from wildman rockets at NSL west. starting this build I assumed it would be a relatively simple project but as with everything it creeps up on you. after my experience with the 29 minimum diameter blackhawk I had on motor deploy which I instantly sent to the great flying field in the sky I knew I wanted to be a lot more careful. ofc by the time id ended up on McMaster I was already doomed
(my soon to be new rocket next to my dearly missed old minimum diameter)
54 is a nice size due to price of engines as well as being able to fit tracking gear being well balanced. after plenty of time spent in openrocket making a way more complicated internal design than probably necessary i came up with the internal design.
For the nose bay I made a custom setup using the wildman threaded aluminum nose piece as a nut to hold the all-thread into the nose bay. the tracker and battery location will be figured out once everything is built. i've been told a lot to keep metal away from tracking so to get the absolute best possible results out of the eggfinder I have I was planning on using nylon all-thread as its not too expensive and seems strong enough.
the e bay is pretty standard. im only planning on using a single quantum altimeter for deployment due to space constraints but otherwise nothing special. the motor retention however is where I had the most design trouble. I wanted to be able to switch between any 54 motor and to do so quickly at the field. the solution I came up with is a set of 6 threaded rods of different preset lengths ( unfortunately the 6xl cases don't fit well) and a bulk plate that I could take out to thread the rod into. this bulkhead with the correct length of rod would then be butted up against a glued in retaining ring and Id use thumb press rivets to retain it in place. then the motor could be screwed in. this solution seems to work the best and provides good repair ability and flexibility while at the same time should be plenty of positive retention.
I know I probably explained it badly but basically the green would be removable and pinned in place via push rivets and magenta would be permanently glued to the motor tube. the dotted line item represents the threaded rod that would go into the motor and the grey is the motor in this case showing a full 54/2800 case.
hopefully when I start putting everything together it'll work out as its a very tight fit. as it stands I have about three inches of space for my drogue which is not much (see photo below) but all things considered it should work ok.
this is mostly it for planning anyways. as for altitude open rocket says 21,500 on an L1090 but rasaero says 24,200 so ill say i'm aiming for 23,000. no clue where Ill find the waiver for that with NCR's fire restriction lol but hopefully the rains will let me fly this one day to its full height. ive been a little hesitant to start with all this complicated planning but i have gotten some work done on the E bay.
gluing the sled in
overall a very slow start to the build. that said shout out to Jesse from modelrocketguy.com for helping me feed my rocket building problem and being super helpful. more to come soon hopefully
so recentley due to my weakness for buying new kits I picked up a 2.2 inch tomach from wildman rockets at NSL west. starting this build I assumed it would be a relatively simple project but as with everything it creeps up on you. after my experience with the 29 minimum diameter blackhawk I had on motor deploy which I instantly sent to the great flying field in the sky I knew I wanted to be a lot more careful. ofc by the time id ended up on McMaster I was already doomed
(my soon to be new rocket next to my dearly missed old minimum diameter)
54 is a nice size due to price of engines as well as being able to fit tracking gear being well balanced. after plenty of time spent in openrocket making a way more complicated internal design than probably necessary i came up with the internal design.
For the nose bay I made a custom setup using the wildman threaded aluminum nose piece as a nut to hold the all-thread into the nose bay. the tracker and battery location will be figured out once everything is built. i've been told a lot to keep metal away from tracking so to get the absolute best possible results out of the eggfinder I have I was planning on using nylon all-thread as its not too expensive and seems strong enough.
the e bay is pretty standard. im only planning on using a single quantum altimeter for deployment due to space constraints but otherwise nothing special. the motor retention however is where I had the most design trouble. I wanted to be able to switch between any 54 motor and to do so quickly at the field. the solution I came up with is a set of 6 threaded rods of different preset lengths ( unfortunately the 6xl cases don't fit well) and a bulk plate that I could take out to thread the rod into. this bulkhead with the correct length of rod would then be butted up against a glued in retaining ring and Id use thumb press rivets to retain it in place. then the motor could be screwed in. this solution seems to work the best and provides good repair ability and flexibility while at the same time should be plenty of positive retention.
I know I probably explained it badly but basically the green would be removable and pinned in place via push rivets and magenta would be permanently glued to the motor tube. the dotted line item represents the threaded rod that would go into the motor and the grey is the motor in this case showing a full 54/2800 case.
hopefully when I start putting everything together it'll work out as its a very tight fit. as it stands I have about three inches of space for my drogue which is not much (see photo below) but all things considered it should work ok.
this is mostly it for planning anyways. as for altitude open rocket says 21,500 on an L1090 but rasaero says 24,200 so ill say i'm aiming for 23,000. no clue where Ill find the waiver for that with NCR's fire restriction lol but hopefully the rains will let me fly this one day to its full height. ive been a little hesitant to start with all this complicated planning but i have gotten some work done on the E bay.
gluing the sled in
overall a very slow start to the build. that said shout out to Jesse from modelrocketguy.com for helping me feed my rocket building problem and being super helpful. more to come soon hopefully