Yes, you absolutely can.
Logistical consideration discussed later.
The more you fly, the more you learn. That would be an argument for spreading cert flights over time.
On the other hand, if the driving distances to cert flights are prohibitive, then doing Level 1 & 2 flights over the same day/weekend is definitely doable. I've heard of folks flying from overseas to do Level 1-2-3 flights over the same weekend.
You will need a couple of things to stage successful Level 1-2 sequence on the same day/weekend:
- Build the rockets (either one or two, per person) for both flights.
- If you only bring one, and it suffers damage on L1 flight, that will scuttle both L1 and L2 attempts.
- Secure cert motors for both flights. You can pre-order motors from online vendor for your cert flight (and pay HazMat shipping fee), or attempt to secure motors from on-site vendors. If do the latter, make sure that the vendor commits to:
- Show up on the day of the flight, and on time.
- Remember to bring the motors that you had ordered.
- I am being super specific about the above because I had, personally, been burned by a flaky on-site vendor, and had to reschedule my cert flight and defaulted to the mail-order approach.
- Secure attendance and willingness to witness your flight from a person authorized to certify your L2 test, and actual flight outcome.
- That means that your L2 flight is depending on attendance of at least one Level-3 or two Level-2 certified NAR or Tripoli members (whichever org you fly with) who had previously committed to witnessing your flight and recovery: https://www.nar.org/high-power-rocketry-info/level-2-hpr-certification/
- Someone also needs to make arrangements to conduct and grade your test before you undertake L2 cert flight.
In practical terms, it means that you need to reach out to the Board of whatever chapter or prefecture you plan to fly with, and make your intensions clear to them well in advance of driving to the launch day. See if there are enough certified flyers planning to attend that particular launch day and to proctor your exam (you never know). Head their feedback, and follow their instructions.
If you are willing to pay extra for HazMat shipping, order your motors 1+ week in advance.
If not, explore local vendor's commitment to attend that particular launch day (never assume that they will come), and their inventory.
Good luck, and have fun!
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P.S.: Feel free to PM me if you have questions.