DAllen
Well-Known Member
Something I've always thought would be fun for L1/L2 certs would be to get a LOC Warlock and L1 on a I600 then turn around and L2 on a J350. Same rocket, same casing lol.
And, no you don't need to "glass" cardboard for a kit designed to fly L1 motors.
one thing I've noticed with 'new HPR' flyers, ones that want to do their L1, is that they really don't know what the [motor] numbers mean. They have an idea, but really can't work out what they mean, if the chosen motor is enough for the desired rocket.. or too much..
Know what the numbers mean, and how they affect the flight!
I have refused an L1 attempt as they had a small H for a 7lb rocket..
I’ve been guilty of this. For my L1 I was looking at a 38mm rocket that could test-fly as a large mid-power rocket at my Class 1 site and also be suitable for L1 and L2 certs. I quickly discovered that I didn’t truly have a concept of what kind of power I’d be playing with. The factor of difference in total impulse between a G and a K is the same as that between a 1/2A and a D. Five total impulse ranges, a factor of at least 8 but possibly approaching 32. The thrust difference is often pretty crazy too, a Loki K627 delivers more than 9 times the average thrust of an AeroTech G67, but they’re the same diameter and fit in some of the same rockets.one thing I've noticed with 'new HPR' flyers, ones that want to do their L1, is that they really don't know what the [motor] numbers mean. They have an idea, but really can't work out what they mean, if the chosen motor is enough for the desired rocket.. or too much..
Know what the numbers mean, and how they affect the flight!
I have refused an L1 attempt as they had a small H for a 7lb rocket..
Not really. the L2 test has some questions in this regard, but it's mostly about safety & distances & such.It's like they should take a simplified version of the L2 test.
An L1 candidate should be able to tell you what the smallest motor they can use on their particular rocket. They should also tell you the that largest motor available will yield "X" type flight profile, and that they might hit MACH (and is that a good thing?) They should also be able to tell you the burn time and how that affects the total thrust / impulse. And to understand / define that a a lighter 'push' over a longer time can yield higher altitudes & such..
at the very least, that they can point to the thrust graph, and know what it is & how to read it..
I saw your post on this rocket it looks awesome! What motor did you put in it?Both good choices. I built a Zephyr and am very impressed with the design, engineering, quality and instructions. Flies great also! Put a 54mm motor mount in it and a nosecone bay for a tracker.
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I have flown it with a CTI iI20 and CTI J210. Both worked very well.I saw your post on this rocket it looks awesome! What motor did you put in it?
I sure would like to know how many of those kits they have sold so far. That's a popular rocketI was just about to order the zephyr then saw it went out of stock for the millionth time
Guess that means you'll be ordering a Goblin. If you do, you won't be disappointed.I was just about to order the zephyr then saw it went out of stock for the millionth time
SkyFire, can you please provide more details about how you put the nosecone bay together? Thanks!Both good choices. I built a Zephyr and am very impressed with the design, engineering, quality and instructions. Flies great also! Put a 54mm motor mount in it and a nosecone bay for a tracker.
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Mac Performance Rocketry offers great, affordable, easy to install nosecone bay kits;SkyFire, can you please provide more details about how you put the nosecone bay together? Thanks!
The bottom of the sled slides into the square opening of the closure lid. I used a section of foam rubber pipe insulation to secure and cushion the rest. I'm sure there's other ways to do it but this was easy and works well.Thank you!! So how do you attach the tracker's sled into the closure lid?
Thanks!I really think I am set on the zephyr. Based on SkyFires build, it looked awesome!!
HelloWow a ton more great suggestions. With the questions concerning thrust graphs and total impulses of rocket motors and their numbers, I have looked over that material before, just not completely in depth and have a basic understanding. I have a good amount of experience flying f motors so I am fairly sure that this step up would be manageable. As far as rockets, the Goblin is a very nice looking kit and I am deciding between Goblin or Zephyr.
I agree with Bart. Go with the recommended motors in the instructions and you should be good to go.Hello
Zephyr is a great rocket. Watch the videos for the build. The instructions detail proper motors for L1 Cert. I used H 100. KISS
Good Luck,
Bart
Here’s the motor chart. You will need mother retention and I suggest a shock cord cover or go to Kevla. LOC has all in one Kits that have motor retainer include.I agree with Bart. Go with the recommended motors in the instructions and you should be good to go.
The first decision point is should you go with a reloadable motor or a single use motor. Under the KISS principle, single use is probably the way to go just to get your certification. In that case, the H100 or H135 are good choices. For reloadable, the Aerotech H128 or H165 are nice safe baby H motors that will get the job done. If you have a 38mm motor mount tube, you could also use the Cesaroni H motors which are practically single use motors in aluminum cases. You should probably consider all of these factors and what stock your local vendor has on hand before purchasing your hardware.
Did you sign up with Apogee for the notification when they get the Zepher back in stock?Sorry have been busy, the motor highlighted is very helpful! And you got quite the collection of rockets
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