Archive for November, 2008

 

Launch Day 11

Launch Day: 11
Date: 16/11/08 Midday
Location: Montview Oval
Rockets: H3,H1a, 1.25L bottle (no fins)

Launch day 11 was really about having a bit of fun, it was really too windy to launch big wrockets but one of my sons schools friends was keen to watch some rockets fly so we headed to our local oval with 2 new wrockets.

H1a was a 1 bottle wrocket with a small RFA and a dummy nosecone, also with some bubble wrap to help protect the nosecone. It had 2 rail buttons.

H1a

H1a

We also took just a 1.25L bottle to watch it tumble without fins, didnt really bother naming this one.

H3 is our new 3 bottle wrocket, its has the new large RFA as well as 4 rail buttons, a dummy nosecone and the main parachute module. We took it just in case the wind died down, but it spent its time watching the small rocket fly from the comfort of the car :)

H3 - 3 bottles + Large RFA + main chute module

H3 - 3 bottles + Large RFA + main chute module

We started off with just the 1.25L + nozzle and had fun launching at between 60 and 80psi with no water, not surprisingly it didnt go very high. We added water and we got it higher but it was still out of control, it went anywhere.

We got rid of that and put H1a on the launcher with water at 80psi and to the delight of everyone it flew straight and probably to about 50m (150ft) which was fun. We had a few flight between 80 and 100psi all to around the same height, the wind was picking up and was blowing the wrockets off vertical.

We got out the launch rail and attached it and started flying H1a off the rail. It came off fine and went straighter .. although the wind did take it once it got high.

Our companions the guys flying the model planes were at the oval as well, we were making sure we didnt launch when they were overhead but it was fun to think of trying to shoot them down … :)

The boys were keen to launch at higher pressures so we did launch H1a at 120psi. I didnt quite see it in the air as the boys did a quick countdown  … 2 1 go .. everyone was looking straight up to see where it was and then we heard it crash down in the car park about 50m away. I dont know how high it went. The simulator puts it about 250ft, so 200+ wouldn’t be out of the question.

It did get a bit of damage with one of the fins still attached but not perfect. We tried another launch but got major fin flutter and only about 20m. It was still way too windy to launch H3 so we decided to pack up and call it a day.

We didnt get any video, but the kids had fun and we got off about 10 launches.

Things we learned

  • The launch rail works well. The wrocket was coming of with no apparent loss in height and very vertical.
  • It was hard to tell with the wind but there wasnt apparent aero issues with the rail buttons on the wrocket
  • We were happy with the new pump. The switch makes it easy to get the wrocket up to pressure quite quickly with minimum physical effort :)

Posted by on November 17th, 2008 Comments Off

H3

Stats:
Name:                       H3 – (Happy V3)
Build Date:                14/11/2008
Capacity:                   3.75L – 3 x 1.25L
Nozzle Size:               9mm
Fill Volume:               ~ 1100ml
Launch Pressure:       not launched yet
Dry Weight:               357 grams
Recovery:                  Main Parachute module with with Tomy timer + 60cm (24″) ripstop nylon parachute
Status:                      NOT ACTIVE

Notes:
This rocket is an extension of the H2 modules. The 3 bottle pressure bottles have been pressure tested to 140pis without leaks. The wrocket also has 4 launch rail buttons. It is fitted with the new large RFA with trapezoid shaped fins.

Flights:
Not launched yet

Highest Altitude:
Not Launched yet, hoping for approx 350ft

Pics:

H3 - 3 bottles + Large RFA + main chute module

H3 - 3 bottles + Large RFA + main chute module

Posted by on November 17th, 2008 Comments Off

H1a

Stats:
Name:                       H1a
Build Date:                16/11/2008
Capacity:                   1.25L
Nozzle Size:               9mm
Fill Volume:               ~ 400ml
Launch Pressure:       120 psi
Dry Weight:               144 grams
Recovery:                  Dummy Nosecone and bubblewrap
Status:                      ACTIVE (8 flights)

Notes:
This rocket is a 1 bottle wrocket with the small RFA and a dummynosecone with bubblewrap. It has 2 launch rail buttons and thats about it. Took all of 5 minutes to put together from the different modules and bottles we had.

Flights:
The wrocket flew well on all flights. Fin damage on hard crashdown in the carpark caused fin flutter on the last launch. Small RFA needs repairing. Highest flight to about 200ft

Pics:

H1a

H1a

Posted by on November 17th, 2008 Comments Off

Website Facelift

You may have noticed the website has changed. I decided to update the interface to make it easier to navigate. All the same content is available as well as the search function (at the bottom of the page).

I have also added a World Map page at the top which shows the location of visitors to the site.

Enjoy the new look site. Comments are welcome

Posted by on November 16th, 2008 Comments Off