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  #1  
Old 08-04-2021, 08:54 PM
caheaton caheaton is offline
Intermediate Rocketeer
 
Join Date: Oct 2007
Posts: 42
Default Backyard launch

Was itching to get in a little flying, but no time to head to the local park as it was around 8:30PM. So, I decided to just fly the little Estes Fat Jax from the backyard (I'd initially bought it as a backyard flyer, but to date it had only flown from the park).

First two flights were with 1/2A3-2 motors. Estes says to use 4 second delays, but the sim shows an ideal delay of 2.5 seconds. Looked to be a good choice. Rocket was pointing up at ejection but didn't appear to be travelling too fast. Parachute ejected and landed about 15 feet from the pad on the first launch and about 25 feet on the second launch (which was noticeably higher than the first despite using the same motor). The sim on this motor claimed it would be around 100 feet and that looked about right.

My wife wanted to see another launch, but at this point I didn't have any more 1/2A's in the range box, so I chose my last remaining Centuri motor....a 45 year old 1/4A4-2. This motor made for an interesting flight....the rocket climbed to maybe 35 ~ 40 feet with chute ejection after apogee but not too much after. It landed about 8 feet from the pad. Despite the low altitude it was a very satisfying flight :-) . It will be interesting to see how it performs on an Estes 1/4A3 motor....(though I wish those were 2 second delays rather than 3).
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  #2  
Old 08-04-2021, 09:36 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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Join Date: Mar 2005
Location: Ft. Thomas, KY
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Quote:
Originally Posted by caheaton
Was itching to get in a little flying, but no time to head to the local park as it was around 8:30PM. So, I decided to just fly the little Estes Fat Jax from the backyard (I'd initially bought it as a backyard flyer, but to date it had only flown from the park).

First two flights were with 1/2A3-2 motors. Estes says to use 4 second delays, but the sim shows an ideal delay of 2.5 seconds. Looked to be a good choice. Rocket was pointing up at ejection but didn't appear to be travelling too fast. Parachute ejected and landed about 15 feet from the pad on the first launch and about 25 feet on the second launch (which was noticeably higher than the first despite using the same motor). The sim on this motor claimed it would be around 100 feet and that looked about right.

My wife wanted to see another launch, but at this point I didn't have any more 1/2A's in the range box, so I chose my last remaining Centuri motor....a 45 year old 1/4A4-2. This motor made for an interesting flight....the rocket climbed to maybe 35 ~ 40 feet with chute ejection after apogee but not too much after. It landed about 8 feet from the pad. Despite the low altitude it was a very satisfying flight :-) . It will be interesting to see how it performs on an Estes 1/4A3 motor....(though I wish those were 2 second delays rather than 3).

The new Estes Space Corps Lunar Scout at Hobby Lobby is another great one for the backyard. So is the Semroc Jupiter B. The Scout flies on an A3 or A10 and the Jupiter B flies on a C6-0, but would work on a B6-0.
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I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Gee'Hod, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Multi-Roc, Solar Sailer II Semroc - Earmark, Snake Jumper
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  #3  
Old 08-05-2021, 11:02 AM
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ghrocketman ghrocketman is offline
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If one can't find B6-0 or C6-0 motors readily, one can generally use a B6-2, B4-2, C5/C6-3 in saucer type oddrocs. You just have to be more diligent about preventing fires.
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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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  #4  
Old 08-06-2021, 10:37 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
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Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
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I miss my days of backyard launching....through H motors....
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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