I thought that the altimeter needed airflow to detect changes to the barometric changes. I thought I read on the Jolly Roger Altimeter 2 that it recommends to not seal the altimeter. What am I missing?
I apologize for the delayed reply. The week before I was on vacation and then the following week I was trying to get caught up. Only now have I been able to respond on social media channels. Typically, with solid fuel rockets the altimeter is placed inside the tube or a chamber, which has some small holes, but you don’t want a lot of air flowing past the altimeter or it will give a false reading (suction effect). Since water rockets don’t have the luxury of placing the altimeter inside the fuselage other than maybe a nosecone, but these typically create a lot of suction like a spoiler on a car if the nosecone is open and not attached. Jolly Logic actually suggested sealing the altimeter in a small zip lock bag and I did test that theory out and it does work. The bag acts as a bladder if most of the air is removed and allows the sensors to read the barometric pressure change. The zip lock bag barrier is counterintuitive, but it actually works and the curved ascent graph on the AltimeterThree shows it working. Suction effect gives a spike and not a smooth curve in the altitude readout.
We sell parachutes and the Chute Release device on our website: www.stratofins.com You can view several deployment methods in the video links below: Water Rocket Parachute Deployment Techniques ruclips.net/video/DW2lmB0f-Os/видео.html Chute Release Water Rocket Deployment Techniques ruclips.net/video/6GoMgsv2ixs/видео.html
Интересно. Мои ракеты объёмом 0.5 литра летают лучше так как давление 10-12атмосфет на старте. Смотрите мой канал на Ютубе называется "Водо Старт". Удачи.
Cool video Don. The altimeter graph looked a lot like my first approach in my experimental. :)
I thought that the altimeter needed airflow to detect changes to the barometric changes. I thought I read on the Jolly Roger Altimeter 2 that it recommends to not seal the altimeter. What am I missing?
I apologize for the delayed reply. The week before I was on vacation and then the following week I was trying to get caught up. Only now have I been able to respond on social media channels. Typically, with solid fuel rockets the altimeter is placed inside the tube or a chamber, which has some small holes, but you don’t want a lot of air flowing past the altimeter or it will give a false reading (suction effect). Since water rockets don’t have the luxury of placing the altimeter inside the fuselage other than maybe a nosecone, but these typically create a lot of suction like a spoiler on a car if the nosecone is open and not attached. Jolly Logic actually suggested sealing the altimeter in a small zip lock bag and I did test that theory out and it does work. The bag acts as a bladder if most of the air is removed and allows the sensors to read the barometric pressure change. The zip lock bag barrier is counterintuitive, but it actually works and the curved ascent graph on the AltimeterThree shows it working. Suction effect gives a spike and not a smooth curve in the altitude readout.
Dose the altimeter 1 have the app too?
Only the AltimeterThree has the app.
Since only Altimeter3 has the app, how can I know the max height reached with Altimeter1?
The display screen on the altimeter shows the altitude achieved for each flight.
Do you sell parachute deployment systems if yes may I have a link?
We sell parachutes and the Chute Release device on our website: www.stratofins.com You can view several deployment methods in the video links below:
Water Rocket Parachute Deployment Techniques
ruclips.net/video/DW2lmB0f-Os/видео.html
Chute Release Water Rocket Deployment Techniques
ruclips.net/video/6GoMgsv2ixs/видео.html
Интересно. Мои ракеты объёмом 0.5 литра летают лучше так как давление 10-12атмосфет на старте. Смотрите мой канал на Ютубе называется "Водо Старт". Удачи.