Hi. Houston here. Great forum. Anybody try one of these yet? Just checking. http://www.jollylogic.com/

I've got one of these... I used it before I fitted my IOSD Mini to track max altitude. Works really well weighs in at about 12g http://www.modelrockets.co.uk/shop/....html?osCsid=52a58b843c8394fa4eefed1627a2f8ad

The Jolly Logic AltimeterOne works well on a quadcopter. There's even a photo of one being used on a Phantom on Jolly Logic's web site. Jolly Logic also sells an AltimeterTwo, but it's only suitable for use in rockets because of the way it gathers and records data. Jolly Logic recently released updated versions of the AltimeterOne and AltimeterTwo. The Estes Altimeter is about $20 less expensive than the AltimeterOne. But, I think the Jolly Logic is a better choice for helicopters (and rockets). The Jolly Logic AltimeterOne includes a rechargeable battery and generally looks better and works nicer than the Estes Altimeter. -- Roger

Yep, I have a Jolly Logic altimeter. Very lightweight and works great. I to use it to help me to learn better to estimate my altitude (until I get FPV and OSD).