Latest Launch Report

Pretty nice condition for a launch

The latest launch was really a very fortunate day. The entire week before the day of the launch was rain, wind, and cold weather. Sunday was a very 50/50 chance of good weather. Miraculously the sun came out and we had very little to a mild breeze of less than 20 mph during the active time of the NOTAM. Two club members worked diligently towards their NAR L3 certification flight.

We had less then 25 people in attendance and masks and social distancing was in place.

Small group in attendance. All with the required PPE masks for safety as required

Louis preparing for his L3 certification flight.
David ready to go with his L3 flight

Both rocket launches towards the level 3 certification boosted great. After that point, both encountered some issues. All components of each rocket returned safely and they will both work towards another attempt. Both were not discouraged and I know they will both accomplish the goal. Achieving Level 3 is not given, it is definitely earned and is a good learning curve.

Frank Burke from Dyna Soar Rocketry arrived and launched a few of his really impressive radio-controlled boost gliders:

Anesti launched a well built rocket on an Aerotech J350 and got some great flight results.
Scott Binder was on site to provide support and helped with safety and motor support. He also took some really terrific photos.
This is a nice area for launching 🙂

This has been a really hectic year. Thank you for making it to the small launch due to the current real world events. Hopefully next year once things hopefully get back to some form of a normal life, we can plan for some more launches from his location. In the meantime, please stay safe and we will look forward to have some launches in 2021 from March to June time frame. Maybe have a couple of two day events.

Flightsketch Mini Altimeter Review

The neat little Flightsketch mini altimeter is a very impressive little altimeter and is worth the price of $40.00.

I tried one out on the Quest duel motor cluster kit called Magnum. The little altimeter provides not just the altitude. It also provides wind speed, temperature, and humidity. You can upload it to their web link and review the data as well as download the CVS file from the site for record-keeping: https://flightsketch.com/flights/1158/  

Happy Evoloterra Day

Commemoration
by
Judith L. Freed
August 11, 1996


Seven candles burning bright
Six are red and one is white
We gather here upon this date
Man on the Moon to celebrate
On the 20th of July in '69
A drama as to stretch the mind
Man from Earth his foot did place
Upon the Moon in Outer Space
How did Man come to such a task
To reach this goal that we may ask
Because of Men who dared to dream
This Cosmic plan did Science scheme
A journey such as none had done
The quest of who would be the one
To touch the Moon and place the flag
The race was on no time to lag
To land upon another World
The mind of Science would be hurled
And leave our flag for all to know
That dreaming dreams can make it so
To Armstrong Aldrin Collins too
With courage and hope these precious few
Did take us thereupon that day
The Moon no longer dreams away
So we remember from now on
That Man has been and Man has gone
To dream and seek and hope and search
And bring us back the Universe.

http://www.evoloterra.com/pdf/Evoloterra_2019.10.20.pdf

Picture Perfect Weather on the most recent club launch

The most recent club launch that took place had the best weather that we have not had for some time. We had six people in attendance with a lot of great successful flights. Don, Vernon, Daniel and myself all had great flights. Vernon launched one of his 3D printed rockets up on an Aerotech 24mm F44 motor and it must have achieved an altitude of 800 feet. He also launched a cool Estes kit with landing legs called "Destination Mars" and an electric propellered kit.

Don launched the Estes Helicopter recovery rocket called the "Flip Flyer" which had great rotation recovery on the three flights he had with the kit. I need to get one of those cool kits. He also launched the Estes Conquest model rocket and the Multi Roc kit in the two-stage format.

Daniel brought out an arsenal of rocket kits. He had several different Nike Ajax rocket models that all went up and recovered perfectly. He launched the DynaStar Snarky model rocket that was very impressive to see during liftoff and ascent. An Estes E12-4 was used with one of Daniels Nike Ajax rockets and was picture perfect. He also launched a LaunchPad Nike Ajax on an Aerotech E15-4.

I launched two 18mm J&H Aerospace boost glider kits. One was perfect with the Estes B6-2, the other one was not as successful. I think it was due more to launch rod whip and not the glider. I then launched the Estes Executioner rocket which had two great flights with the Estes E12-4 motors. The second flight I added the Jolly Logic Alt 3 just to see how high it went and the altimeter read 541 feet:

The weather was so great, that I had wished myself that I had brought more rockets 🙂

I do hope that our next launch has picture-perfect weather like this great launch day.

Common Causes for a Rocket to Fail

This table contains information about the most common causes for a rocket to fail.

The intent is that, with proper care and prevention, these failure modes may be avoided.  (Source From NASA Houston Rocket Club NAR Section 365)

TASK/STEP HAZARD CAUSE PREVENTATIVE MEASURE
Any 1. Non-Hazardous Anomaly Premature parachute ejection All flights in this category result in safe landing under parachute.   -
Flight preparations 2. Premature motor ignition   Connecting igniter to live ignition system - Using systems with a switch that returns to “off” when released per NAR safety code.  Ensure continuity checker is igniter/electric match/flash bulb safe.
  3. Premature ejection charge ignition Electronic Altimeter failure / capacitor discharge -use switch or shunt on charge circuits until placed on pad
Rocket boost 4. Erratic boost a. Rocket unstable - Check the stability of the rocket with the selected motor per NAR safety code if not a proven design/motor combination  -Use computer CG/CP program, CP should be 1.0 body diameter aft of CG
    b. Unstable launch pad - insure launch pad is sufficiently strong to withstand wind and launch forces. - use rail system for HPR launches
    c. Too much wind - Launch only in winds of less than 20 mph as required by NAR safety code - In windy conditions low thrust launches should be avoided.
    d. Insufficient thrust - Follow anufacturer¹s recommended maximum lift-off weight per NAR safety code - Use computer simulation program to determine thrust required
  5. Airframe failure a. Improper construction - Follow manufacturer assembly instructions. - On original designs use standard construction methods. - Check for secure fins, launch lugs, and proper nose cone fit. - Check secure motor mount assembly.
    b. Fin flutter - Be sure to align grain with leading edge of fin. (standard construction method) - Avoid high aspect ratio fins
    c. Improper Motor Selection - Use care in selecting motor for flight.  Follow manufacturer recommendations. - Follow manufacturer recommendations for max lift off weight per safety code. - Attempt high-G launches only rockets having appropriate construction.
  6. Catastrophic motor         failure a.Temperature cycling of black powder motors - Store motors at a consistent temperature
    b. Improper construction - Check all parts have been used (O-rings, ejection charge, spacers, etc.) - Check closures are tight, threads are not stripped.  
Rocket recovery 7. Failure to eject     recovery system a. Motor ejects from rocket - Use motor retainer clips or sufficient tape to provide positive friction fit of motor - Be sure that recovery system not packed too tightly - Use heat resistant adhesives in motor retention system
    b. Improper assembly of reloadable motors   - Build motor correctly following manufacturer directions  - Avoid grease on delay element  - Avoid crimping or damaging o-rings  -Verify ejection port is clean and clear  - Insure ejection charges are loaded
    c. Electronics failure   - Verify system integrity before first flight or after major changes - Use motor ejection for redundancy
    d. Failure of electronic        recovery system to fire            ejection charge   - Verify charge integrity with multi-tester or self-testing recovery system - Check mach lock-out settings on altimeter - Insure all hardware and electrical leads are installed properly and secured against flight loads.  
    e. Construction/ Preparation - Too much wadding/packed too tightly - parachute packed too tightly - obstructions within body tube
TASK/STEP HAZARD CAUSE PREVENTATIVE MEASURE
  8. Failure of chute to open a. Recovery device stuck in rocket body 1- Too much wadding 2- Recovery device too large or not packed properly 3- Insufficient ejection charge for size of body tube – see chart
    b. Parachute burned by ejection gasses   - Use flame-resistant recovery wadding or other protection system  
    c. Parachute shroud lines fouled   - Fold  parachute carefully as described by manufacturer
  9. Strip of recovery system at deployment a. Deployment occurred too early or too late - Follow anufacturer¹s recommended maximum lift-off weight and/or computer simulation data. - Use electronic apogee detecting deployment system. - Use rocket flight simulation program to simulate flight determine best delay time. - Select shorter delays when winds are higher.  The rocket will weather vane into the wind and shorter delays are required for proper recovery system activation.
    b. Improper construction - Use proper hardware
  10. Separation of recovery or other  system. a. Recovery system        improperly secured       during preflight prep.   - For initial flight, or subsequent flights after repair, double check that the recovery system is properly attached to the rocket/payload section/nose cone. Inspect quick links, eyebolts, or other hardware to ensure that links are closed/locked and that other hardware is intact and secured. - Insure eye bolt connector will not un-screw during descent
    b. Failure due to wear and     tear of flight operations - Periodically inspect all components of the recovery system.  Replace/repair burned or worn shock cords. Replace/repair parachutes with worn or frayed shroud lines. 
  11. Rocket drifts into buildings / houses / trees a. Parachute too large Refer to parachute sizing guide and drift charts on back of checklist
    b. Too windy Insure winds are within limits. Consider winds aloft information
    c. Main parachute     deploys early -Use shear pins to secure main parachute compartment. -Use extra long shock cord and “metered deployment” of cord in drogue section. -Use proper amount of black powder in drogue ejection charge
  12. Rocket impacts prep area causing personal injury Spectators not paying attention to rocket flight - Use electronic PA system for all high power launches. - Launch Control Officer responsible for calling “Heads Up” -LCO give periodic detailed briefing to spectators on the meaning of ‘heads up’       and the corrective action to be taken -If possible, angle all flights away from spectators
  13. Rocket impacts Buildings/houses in ballistic flight Multiple failures -Follow wind/altitude restrictions - see “failure to eject recovery system”

NOTE: Preventative measure is not all inclusive and additional precautions may be required in order to maximize safe flying condition.    

February 9th 2020 GRC 790 Launch Report

The weather turned out really very nice for a club launch for February 9th 2020 at the WyEast Middle School

A very Impressive kit.

Vernon, Don and John Casey were in attendance along with me for the launch.  It was sunny with little to no wind.  The field was quite marshy, so the pad was set up on the pitcher’s mound since that was the highest and driest spot out in the field.  John Casey launched a very cool model rocket from Estes called the Manta II.

It may be a discontinued kit, however Estes is offering starter kit called the Javelin which looks very similar: https://estesrockets.com/product/001436-javelin-launch-set/

The rocket was launched as least four times on Sunday and each time the little glider stayed up in the air for more than 30 seconds each flight and was really impressive to watch fly.

This kit would be ideal for anyone wanting to try for the NARTEK Silver patch: https://www.nar.org/wp-content/uploads/2014/08/NTSilver.pdf

The NARTREK program is a great skills achievement program. They offer the Bronze, Silver and Gold Achievement and advanced programs: https://www.nar.org/members/nartek-skills-program/

The Sirius Eradicator

Don Buchanan Launched the Estes Multi-Roc Rocket once with the boost glider attached and twice in the two stage configuration without the boost glider.  The booster sections parachute caused the rocket to land up behind the baseball catchers mount fence. Before we knew it, Vernon was climbing up the fence and retrieved the booster section which was used again for two more flights as a two stage rocket. All flights were very impressive and successful. Then he launched the Sirius Rocketry Eradicator rocket: https://www.siriusrocketry.biz/ishop/sirius-rocketry-eradicator-29mm-1332.html

The First launched was on an Estes E motor which was a slow liftoff and achieved an altitude of less than 200 feet.  He made up for it on the second flight with an Aerotech Economax F-67-4 https://www.rocketryworks.com/f67-4/?gclid=Cj0KCQiAm4TyBRDgARIsAOU75sqjFEguDZi7O6XuxNIGOZLM33xtuExu3vWbbVtuKOlWWF6XL58QLKoaAiodEALw_wcB which kicked that rocket up to 600 plus feet.  Don had a Jolly Logic Alt 2 in the rocket so it provided data for speed (max speed was 192 miles per hour with close to a max g force of 10 gs).

That was the highest impulse launch of the morning. J

I launched four very light weight rockets from Discount Rocketry that were called Nexus rockets: https://www.discountrocketry.com/advanced_search_result.php?keywords=nexus&sort=4a they are pretty cool because they require assembly without any glue.  They can easily go up to 1000 feet with an Estes C6-5 motor.

I launched two with Estes motors and then two more with the new Quest Aerospace C and D composite motors:

Motors that did not perfom as expected 🙁

I was not impressed and honestly embarrassed and disappointed as to how the C and D motor under performed.  Both motors sputtered on the pad and then caused the rocket to lift off and do a U-turn into the muddy ground. It was funny to see that happen, however if this had happened to a new rocket hobby enthusiast with a complex model they had spent hours on, hoping that the motor would push the rocket high up in the air like the Estes C and D motors normally do, then that would have been very bad and sad. Fortunately you as a hobby consumer can do something about it.  First, retain the motor and take a photo like the one above that has the motors lot/batch number. Go to this web site: http://www.motorcato.org/ There is a link to report a motor malfunction.  There is also a list to review of the most recent motor issues here:  http://www.motorcato.org/latest

Don Buchanans Multi Roc Two Stage and Flikits Borealis ready for launch

Sometime it may be a good idea to see what others have reported about a certain motor before buying it. Also sometimes you can email to the motor vendor such as Aerotech or Estes and they may try to compensate you with a new kit or new motors if the motor burned through the side of your rocket.

Towards the end of the launch window, I launched a FlisKits model rocket called the Borealis.  It is a very cool looking Sci-Fi kit that I do hope the new owners bring back for further sales.  It looks complicated, however can be built within two days. It was launched up into the sky with an Estes C6-3.  The rocket lifted up perfectly and the rocket rotated while under thrust slowly as if it was going to be placed in orbit. The recovery parachute did not deploy perfectly, however the model is so light weight that the landing was fine and the rocket suffered no damage at all.

Next Sunday February 16th is our launch at Goldendale.  I do hope the weather turns out nice like the launch we just had here at Wy East.  Keep your fingers and toes crossed.  I will see you all there.

“May the winds be light, and the skies be blue, and may all your rockets fly straight and true”

Quoted from Tim Van Milligan at Apogee Rockets