Low G CB
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Low G CB
I understand that low G is a no go in an R22 (Or any teetering rotor system for that matter)However, in a 300CB is it safe to demonstrate this condition to students? Would there be any additional maintenance concerns regarding the main rotor if this was demonstrated with some degree of frequency? Many thanks in advance.
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As you rightly state the R22 is a no go but you can safely demonstrate a small ammount of low g in the 300CB. The best results are obtained by a gentle pushover after a climb at about 40 knots.
Excessive pushovers can result in droop stop pounding and will cause considerable damage to the rotor head. Therefore try a little at a time, it won't take much of a push to feel light in the seat and that's all you need to demonstrate the effect, you're not looking for a few seconds NASA weightlessness training.
It is a worthwhile demo especially to a student who also flies R22 so they are familiar with the feeling allowing them to recognise low g and react to it in the correct way.
[This message has been edited by The Governor (edited 24 April 2001).]
[This message has been edited by The Governor (edited 24 April 2001).]
Excessive pushovers can result in droop stop pounding and will cause considerable damage to the rotor head. Therefore try a little at a time, it won't take much of a push to feel light in the seat and that's all you need to demonstrate the effect, you're not looking for a few seconds NASA weightlessness training.
It is a worthwhile demo especially to a student who also flies R22 so they are familiar with the feeling allowing them to recognise low g and react to it in the correct way.
[This message has been edited by The Governor (edited 24 April 2001).]
[This message has been edited by The Governor (edited 24 April 2001).]
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Have to agree with wassa, Stay away from low/neg G in any sort of helo. If i remember correctly the robbie used ot have a just be cautious of low/neg G sticker, consequently several instructors (some with buckets of experience) wrote themselves & students off well showing studes the whole scenario & how to recover.
Robinson then changed the sticker to a definite DO NOT go there sticker.
The problem with showing studes things they shouldn't do (as they may bite) is one may get bitten if stude reacts incorrectly/badly.
Have a real good chat about it, draw pictures, insure stude understands.....nuff said
Fly Safe
Hone
Robinson then changed the sticker to a definite DO NOT go there sticker.
The problem with showing studes things they shouldn't do (as they may bite) is one may get bitten if stude reacts incorrectly/badly.
Have a real good chat about it, draw pictures, insure stude understands.....nuff said
Fly Safe
Hone
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Like I said, definietely not in the R22 as it's prohibited by the POH. Though having said that I know of FAA DPE's who demo low g and recovery from the resultant roll in an R22.
I taught low g in a very structured training environment in a fully articulated rotor system where mast bumping is not the hazard it is in a semi rigid rotor head.
It is a safe excercise when carried out correctly. I'm not advocating people go out and start getting weightless in R22's. There is no need to run a mile at the mere mention of low g.
At the end of the day you have to trust a student. You show them engine off landings, forced landings and hover autos and they aren't supposed to practice them solo. When I was instructing I never heard of a student of mine performing an EOL after practising them with me. By demostrating the effect it demystifies low g and in my experience they are usually so uncomfortable with the feeling they wouldn't want to try it again.
You don't have to treat students like naughty children, they are after all adults. If you suspect you have a student that will go out and try things you have told them they shouldn't then its time for a serious chat and possibly a gentle push towards the door.
Case in point. A student of mine after a boring session of droning round perfecting circuits asked me "When can we go and land in the hills and woods like I used to with my last instructor"....Would you send this one solo for the next flight? He left and never came back.
Gov
[This message has been edited by The Governor (edited 26 April 2001).]
I taught low g in a very structured training environment in a fully articulated rotor system where mast bumping is not the hazard it is in a semi rigid rotor head.
It is a safe excercise when carried out correctly. I'm not advocating people go out and start getting weightless in R22's. There is no need to run a mile at the mere mention of low g.
At the end of the day you have to trust a student. You show them engine off landings, forced landings and hover autos and they aren't supposed to practice them solo. When I was instructing I never heard of a student of mine performing an EOL after practising them with me. By demostrating the effect it demystifies low g and in my experience they are usually so uncomfortable with the feeling they wouldn't want to try it again.
You don't have to treat students like naughty children, they are after all adults. If you suspect you have a student that will go out and try things you have told them they shouldn't then its time for a serious chat and possibly a gentle push towards the door.
Case in point. A student of mine after a boring session of droning round perfecting circuits asked me "When can we go and land in the hills and woods like I used to with my last instructor"....Would you send this one solo for the next flight? He left and never came back.
Gov
[This message has been edited by The Governor (edited 26 April 2001).]
