AltimeterTwo

For the compactness and features this Altimeter Two has is awesome! Plus it provides a lot of other information such as max thrust, avg thrust, coast time, time of ejection after apogee, descent speed, max speed, and total duration. I love it for redundancy if using a dual deploy onboard computer as it displays numbers and one does not have to count beeps. The USB port is only for charging and not for transferring data. Nonetheless, it is a great addition to make rocketry that much more entertaining and scientifically useful. The button seems challenging to press but once one reads the instructions it is clear just press it like you would normally and it will activate. The display needs to be read at the proper angle as it is not that bright. But it keeps the information as long as it has power so you can read it in better lighting conditions. I was able to use it on two other launches and it worked great even when the nose cone came off but the parachute was stuck inside the rocket. It said the rocket descent speed was 57mph! Alas, it was a 6' long Estes Mean Machine so it is now about a 5'6" Mean Machine and the Altimeter two that was wrapped in 1/2" pipe insulation and a rubber band suspended from the nosecone works great! The only issue I had is I could not get it to charge. After reviewing their website support page I found on tip was to use a USB extension cable and after trying it in 6 different USB ports on two computers I was ready to give up. I even had it fail on a trip to ROCstock due to battery drain. Nonetheless, I the cable works and I now have it fully charged and ready to go next time.

Worked every time. Crashed into a farm pond, and it kept on working. We lost the data for that one flight, but let it dry out and we were able to use it for subsequent flights with no issues.

Much more reliable and accurate than the Estes version, plus a massive amount of data comparatively. Yes, it's more expensive than the "toy" option, but it's worth it if you really want to collect data about your launches. The Estes one is fine if you just want a fun toy to see how high your low-power kits got, but be warned that it doesn't seem to be as accurate overall. One other thing that the instructions cover, but I want to remind you. If you don't vent your rocket with at least two small holes, the pressure inside the model won't match the outside pressure, and you will not get accurate readings. I know some people might not like making holes in their perfect paint jobs, but if you want any altimeter to be accurate, you need to do this. Just find two unobtrusive places and drill small 1/8th inch holes in the body tube.

Tells you apogee, delay time, Mach speed, time of flight, etc....these really are incredible items to have for model Rocketry...rsbhunter

I'm only giving this four stars because I've only used it once and I can't account for it's life span, but the initial flight was flawless and it came back with all data seemingly accurate. Easy to use, easy to read display. Worth the money for any rocket enthusiast who wants to see how high your rocket actually went, and fun to look at max speed and acceleration data.

We purchased the Altimeter Two so that my son could do his science project with homemade rockets. I didn't think we needed this altimeter because it offers a lot of data - more than I thought would be useful. Even though we could have lived with the simpler version, this altimeter is awesome! It records so much and really puts the life of the rocket launch in to workable data. Overall, it is really simple to use and very hardy. We did create a little "booty" for it. We cut up an old sock, stapled it and slipped the altimeter in to give it some extra protection. We had a few failed missions where the parachute didn't open and the altimeter worked well and didn't appear to have a scratch on it. Just be sure to charge it before launch and turn it on before you go. You won't be disappointed.

This is a fantastic product that lets you see data without having to download each time. You should buy the small leather case as well, to avoid too much exhaust gas entering the unit. Jolly Logic's biggest asset is their customer service. Great communicators, never leave you feeling like you're hanging, will repair their products if you ship them to CA. Great company, looking forward to more business in the future with them. Their Chute Release emulates dual deployment and is second to none. We use it in our BT70 tubes with AeroTech's 24/40 and 24/60. Again, buy the case for the chute release. Keep it up Jolly Logic!

Super easy to use, and small enough to fit in BT50 sized (24mm) tubes. We used it in a few different rockets up to 2.0" and ranging from C to F impulse. The rockets we've used the Altimeter 2 with have payload bays and we drilled three 1/16" vent holes in airframe to ensure the unit would work properly.

A remarkable little device that can fly on almost every rocket I own.

軽量丈夫で正確(1mまたは1フィート単位だが)に高度を計測できる。モデルロケットに搭載するフライトコンピューターとして、普通に購入できるものの中では最高級品と思われる。ペットボトルロケットには豪勢すぎるが手軽で良い。高度さえわかれば良いのであれば、同社のAltimeter OneかEstes社のEstes 2246 Altimeterがより安価である。 Apogee(最高点)のみならず、最大加速度やパラシュートを搭載していればパラシュートの展開高度(Ejection Altitude)等々も分かる。気圧で計測しているので密閉して搭載しても動作しない。ハダカでくっつけるか搭載部に空気穴を開ける必要がある。軽くて小さいので、きちんと固縛しておかないとハードランディング時などで紛失する危険性が高い。