My 318 is coming in at 306g without motors, the .ork file from Mach 1 states 281.373g, so I came in sort of close. I'm getting about 620 ft on C6-5's, and just under 1200 ft on a trio of Quest D16-8.Ah, your weight is gonna be a lot more than my Trident kit. That kit is good for about 1000 ft on 3x C6-5, with a total weight of about 275g (including motors).
My 318 is coming in at 306g without motors, the .ork file from Mach 1 states 281.373g, so I came in sort of close. I'm getting about 620 ft on C6-5's, and just under 1200 ft on a trio of Quest D16-8.
Where do you fly? Tumble recovery, which includes nose blow, is a different story on a rocky desert "field" than it is an a soft, grassy one.
Make sure you use some bright braided fishing line instead of clear mono-filament, as it totally is invisible at some distance so you won't know where you shot over the branch.View attachment 426920
I built this ridiculous thing. Will it help me get my rocket out of the tree? Stay tuned.
Wow! You have a fancy eat'n table for your rockets!Worked on organizing the basement.
View attachment 427036
Make sure you use some bright braided fishing line instead of clear mono-filament, as it totally is invisible at some distance so you won't know where you shot over the branch.
The main tubes are 38mm (2.6"), 31 grams is not insignificant mass at this level...Your extra is probably glue and paint. I always update have to update my sims for those. What's the body diameter? That's a pretty big different in altitude (620 vs 1000) for the same engines and approximately same mass.
Too bad..only on reciprocating saw..which I do not have...I have .just a jigsaw..There is an adapter for a drill but $42.00...I just tale my chance with my 30 seconds shake..comes out good ...great..if it does not..so be it.The rattlecan shaker is called a MixKwik.
Ordered mine through Amazon but have seen it available from many other outlets.
Essentially is is a clamping system that holds a rattlecan to a reciprocating saw “blade”.
Haven’t received it yet so I can offer no review of well it works...or not.
The $42 drill shaking mechanism was purchased by a rocketeer here on TRF. He also posted a photo of the unit and he had mounted the drill to the workbench for a semi-permanent installation.Too bad..only on reciprocating saw..which I do not have...I have .just a jigsaw..There is an adapter for a drill but $42.00...I just tale my chance with my 30 seconds shake..comes out good ...great..if it does not..so be it.
The main tubes are 38mm (2.6"), 31 grams is not insignificant mass at this level...
I typed 2.6, then knew it was wrong and thought I fixed that ... at 306g dry, with engines it was 375g I think. Are you using OR or rocksim? I just ran a quick and dirty, the sim hit the ground and I realized the model had no parachute. Added a chute, still used actual weight... I'm using defaults in rocksim 10, still need to tweak to a longer rail etc., but don' think that will change things much.Uh, 38mm is only 1.6", by the way. 2.6" would be 66mm. Anyway, my Trident is a 41.6mm body. I simed adding 31g and my apogee goes down to 800 ft. I wonder if the aerodynamics are significantly different between the two rockets. Is your mass including engines? Dry mass on mine is only 198g.
I typed 2.6, then knew it was wrong and thought I fixed that ... at 306g dry, with engines it was 375g I think. Are you using OR or rocksim? I just ran a quick and dirty, the sim hit the ground and I realized the model had no parachute. Added a chute, still used actual weight... I'm using defaults in rocksim 10, still need to tweak to a longer rail etc., but don' think that will change things much.
My 318 is coming in at 306g without motors, the .ork file from Mach 1 states 281.373g, so I came in sort of close. I'm getting about 620 ft on C6-5's, and just under 1200 ft on a trio of Quest D16-8.
Is it me or are those half moons slightly less than a semicircle? It looks like there will be a sliver of open space in the middle where hot ejection particles could go straight through.The coupler between the engine mount tube and recovery tube has a baffle of two half-circles which I made from a bulkhead. I was originally going to put in a support cross member, but decided against it. The kevlar part of the shock cord should fall into one of those slots fairly nicely. View attachment 427237
I got a couple of the upgrade kits- plywood fins, centering rings... not a full kit, but no issues, great fit.Question: I've been looking for an Estes Leviathan kit, and the OOP ones are pricey when they come up on Ebay. Anyone purchased Vander Burn Rockets before?
https://www.vander-burn.com/product/estes-leviathan-clone/24?cp=true&sa=true&sbp=false&q=false
They are selling a Leviathan and a Partizon clone (not to mention the HFXXL which would be awesome to add the HF collection) and I am wondering if anyone has used these kits and has had positive reviews?
OK, add streamer to what I stated. Still, landing on grass or landing on rocks makes a big difference in what recovery method is adequate.If you check some of the simulated speeds, tumble recovery and streamer recovery aren't terribly different, unless you use a really huge streamer. When I sim an Estes Alpha III, it actually descends *faster* on a streamer, up to a certain size of streamer. I assume this is because the streamer prevents the "tumble" rotation that would otherwise slow down the rocket.
Yeah, I didn't want to be all negative and nit-picky. But since you've started...Is it me or are those half moons slightly less than a semicircle? It looks like there will be a sliver of open space in the middle where hot ejection particles could go straight through.
I got a couple of the upgrade kits- plywood fins, centering rings... not a full kit, but no issues, great fit.
I've got one their Cherokee-H kits. Great kit, parts seem to fit fine. Only wish on my end is that they make one with 38mm motor mounts, as I prefer to use Loki hardware/reloads.Finally back in the shop...helped my son finish up his star orbiter build (he can't let me hold the high flight record in the house) so it will be ready for next club launch. He also built a viking out of our bulk pack, my daughter built her hi-flier (she has a HFXL, and this one is going to be a matching downsize), and I started on my baby bertha. The commanche 3 is built and fitted, just need to get decals installed.
Question: I've been looking for an Estes Leviathan kit, and the OOP ones are pricey when they come up on Ebay. Anyone purchased Vander Burn Rockets before?
https://www.vander-burn.com/product/estes-leviathan-clone/24?cp=true&sa=true&sbp=false&q=false
They are selling a Leviathan and a Partizon clone (not to mention the HFXXL which would be awesome to add the HF collection) and I am wondering if anyone has used these kits and has had positive reviews?
Is it me or are those half moons slightly less than a semicircle? It looks like there will be a sliver of open space in the middle where hot ejection particles could go straight through.
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