Brendan Posted September 14, 2010 Report Share Posted September 14, 2010 There are plenty of video's on YouTube of people pulling 0G in 172's, is this SAFE to do in a CT? How do you do it? Link to comment Share on other sites More sharing options...
Roger Lee Posted September 14, 2010 Report Share Posted September 14, 2010 Hi Brendan, Tell me what an OG is and I'll let you know. Link to comment Share on other sites More sharing options...
Tony & Rose Posted September 14, 2010 Report Share Posted September 14, 2010 Teaching students stalls. That how you do it.. Link to comment Share on other sites More sharing options...
coppercity Posted September 14, 2010 Report Share Posted September 14, 2010 Hi Brendan, I would caution against any prolonged negative G maneuvers for a couple reasons. 1. the rotax is not certified for prolonged negative g's or aerobatics 2. The engine may quit from fuel starvation 3. you could introduce air into the oil system from floating the oil to the top of the sump, which could be harmful to the engine 4. The CT load limit factor is much less negative than positive. -2 vs 4 The manual prohibits it if the flaps are deployed past 0. Just my 2 cents. Link to comment Share on other sites More sharing options...
gisurvey Posted September 14, 2010 Report Share Posted September 14, 2010 Hello Brendan, - related to plane - indeed, the published safety load limits are +4/-2g. but it's a little difficult to create -2g without some really advanced aerobatic figures. - related to ROTAX - theoretically it's clear: max -0.5g for max 5 sec. I think it is not a problem to keep the plane for a few seconds at 0g, but as coopercity said, only for very limited time. However, it could be useful to keep an airfield in sight when you do this Regards, Alec excerpt from OM Rotax 912. Link to comment Share on other sites More sharing options...
Roger Lee Posted September 14, 2010 Report Share Posted September 14, 2010 Ok, now I see. You mean Zero G's. These guys answered it. Momentary as you do a maneuver, but any thing past a couple of seconds is to long for the engine and the airframe. This is in print for Rotax and FD. If it is only stall practice that isn't a big deal. I practice stalls all the time. Their fun and very straight forward in the CT. You can do them where they are gentle and kind of just mush or a much harder nose up and let the nose break over. Other than stall practice I personally don't see a reason to get into zero or negative G's. Link to comment Share on other sites More sharing options...
FlyRatz Posted September 15, 2010 Report Share Posted September 15, 2010 My experience when flying near 0G is, that fuel is likely to come out of the carburetors. I tried it a few times and at anytime a very strong smell of fuel entered the cockpit. I dont like to catch a fire during flying and therefore I avoid maneuvres which result in low G's. Kind regards Markus Link to comment Share on other sites More sharing options...
Magnet Posted September 15, 2010 Report Share Posted September 15, 2010 NICE DOO MARKUS Link to comment Share on other sites More sharing options...
Brendan Posted September 16, 2010 Author Report Share Posted September 16, 2010 Thanks for all the replies! By the way, just out of curiosity (you guys have scared me away from doing any 0G maneuvers), how would you do it? Link to comment Share on other sites More sharing options...
GlennM Posted November 30, 2010 Report Share Posted November 30, 2010 Wait until your passenger is nearly asleep, then start a gentle climb. Push the stick forward promptly until they fly out of the seat. Watch their hands and feet as they tend to flail around a bit when they wake up so suddenly. Link to comment Share on other sites More sharing options...
chanik Posted November 30, 2010 Report Share Posted November 30, 2010 Rotax allows -0.5G for up to 5 seconds. I doubt they would permit it if the engine tended to catch fire occasionally. I fly 0G pushovers quite a bit. It's a very gentle maneuver but surprisingly unsettling to people who have never done it. Much more so than an accelerated stall or 60deg turns. Link to comment Share on other sites More sharing options...
bruno dias Posted July 6, 2011 Report Share Posted July 6, 2011 i found this in youtube Link to comment Share on other sites More sharing options...
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