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jim.kulbeth(at)insightbb.
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 Posted: Wed Feb 13, 2013 4:32 pm Post subject: reverse prop rotation at shut down |
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Hey guys. I do read all of the posts but never respond. Just looking
for info. Now I am curious. Which Rotax are you speaking of. I have
3 912 UL engines on my planes and have never had one to kick back. Is
this the engine you are discussing?
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Wed Feb 13, 2013 5:34 pm Post subject: Re: reverse prop rotation at shut down |
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Hi Jim,
yes, it is the 912 and usually the 912ULS.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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Alan Carter
Joined: 02 Jul 2012
Posts: 378
Location: Kent, England.
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| Posted: Thu Feb 14, 2013 1:09 am Post subject: Re: reverse prop rotation at shut down |
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Hi Jim.
Have a 914 thats the one with the Turbo, and that kicks backs, its a dreadful thing to see,the last time i flew was one the 17th December, got the tail plane off at the moment. Hoping to stop it kicking next job ??
Alan
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jim.kulbeth(at)insightbb.
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| Posted: Thu Feb 14, 2013 3:27 am Post subject: reverse prop rotation at shut down |
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Thank you. I do not follow all the chats so was not sure. My brother and I have planes with the 80 HP and 100 HP natural aspirated engines. When we shut them down they stop as if a clamp grabs the crank shaft. Among other aircraft, we fly a self launching glider called a Lambada. My brother is the US dealer and we know all of the owners in the US. Not one has complained about this problem. My question is "Are you hearing this complaint from pilots in the USA as well as all over?" I know dealer for Sirus aircraft and he has no complaints. I know of no one here in USA that is flying the turbo. I think it is to young an engine for us. Not really sure.
I look at the Rotax blogs and do not know where you guys are located although you are pretty active aviation guys.
Regards
Jimmy
On Feb 14, 2013, at 4:09 AM, "Alan Carter" <alancarteresq(at)onetel.net> wrote:
| Quote: |
Hi Jim.
Have a 914 thats the one with the Turbo, and that kicks backs, its a dreadful thing to see,the last time i flew was one the 17th December, got the tail plane off at the moment. Hoping to stop it kicking next job ??
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=394242#394242
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Thu Feb 14, 2013 5:19 am Post subject: Re: reverse prop rotation at shut down |
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Hi Jim,
This usually happens because carbs are out of sync, poor throttle or choke setup at engine start, or poor friction torque for the slipper clutch in the 912ULS or 914.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
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| Posted: Thu Feb 14, 2013 6:32 am Post subject: reverse prop rotation at shut down |
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Jim:
You have been brainwashed - "natural aspirated" - The term is Normally Aspirated or Carbureted. See what happens when yo watch too much TV and CNN. I know, I know you are not in the states... Just BUSTING!
[img]cid:361(at)goomoji.gmail[/img]
Barry
On Thu, Feb 14, 2013 at 6:27 AM, Jim.kulbeth(at)insightbb.com (Jim.kulbeth(at)insightbb.com) <jim.kulbeth(at)insightbb.com (jim.kulbeth(at)insightbb.com)> wrote:
| Quote: | --> RotaxEngines-List message posted by: "Jim.kulbeth(at)insightbb.com (Jim.kulbeth(at)insightbb.com)" <jim.kulbeth(at)insightbb.com (jim.kulbeth(at)insightbb.com)>
Thank you. I do not follow all the chats so was not sure. My brother and I have planes with the 80 HP and 100 HP natural aspirated engines. When we shut them down they stop as if a clamp grabs the crank shaft. Among other aircraft, we fly a self launching glider called a Lambada. My brother is the US dealer and we know all of the owners in the US. Not one has complained about this problem. My question is "Are you hearing this complaint from pilots in the USA as well as all over?" I know dealer for Sirus aircraft and he has no complaints. I know of no one here in USA that is flying the turbo. I think it is to young an engine for us. Not really sure.
I look at the Rotax blogs and do not know where you guys are located although you are pretty active aviation guys.
Regards
Jimmy
On Feb 14, 2013, at 4:09 AM, "Alan Carter" <alancarteresq(at)onetel.net (alancarteresq(at)onetel.net)> wrote:
> --> RotaxEngines-List message posted by: "Alan Carter" <alancarteresq(at)onetel.net (alancarteresq(at)onetel.net)>
>
> Hi Jim.
> Have a 914 thats the one with the Turbo, and that kicks backs, its a dreadful thing to see,the last time i flew was one the 17th December, got the tail plane off at the moment. Hoping to stop it kicking next job ??
> Alan
>
>
>
>
> Read this topic online here:
>
>
>
>
>
>
>
>
>
>
===========
-List" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
|
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jim.kulbeth(at)insightbb.
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| Posted: Thu Feb 14, 2013 4:25 pm Post subject: reverse prop rotation at shut down |
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Matter of fact I am in USA. Indiana as a matter of fact, and yes if you wish you can say "normally aspirated" but I wrote that at 4am in the morning so I have an excuse. However it is also a naturally normal aspirated engine 'cause ain't no air being forced into the engine. Now on a more serious note, i cannot understand why you have the problem unless it is fuel. I would think Rotax would address this because they should have warranty problems. With our 912 UL engines I have never seen it happen. Do you know if this has happened outside the ULS series?
RegardsJimmy
On Feb 14, 2013, at 9:31 AM, FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)> wrote:
[quote]Jim:
You have been brainwashed - "natural aspirated" - The term is Normally Aspirated or Carbureted. See what happens when yo watch too much TV and CNN. I know, I know you are not in the states... Just BUSTING!
<361.gif>
Barry
On Thu, Feb 14, 2013 at 6:27 AM, Jim.kulbeth(at)insightbb.com (Jim.kulbeth(at)insightbb.com) <jim.kulbeth(at)insightbb.com (jim.kulbeth(at)insightbb.com)> wrote:
| Quote: | --> RotaxEngines-List message posted by: "Jim.kulbeth(at)insightbb.com (Jim.kulbeth(at)insightbb.com)" <jim.kulbeth(at)insightbb.com (jim.kulbeth(at)insightbb.com)>
Thank you. I do not follow all the chats so was not sure. My brother and I have planes with the 80 HP and 100 HP natural aspirated engines. When we shut them down they stop as if a clamp grabs the crank shaft. Among other aircraft, we fly a self launching glider called a Lambada. My brother is the US dealer and we know all of the owners in the US. Not one has complained about this problem. My question is "Are you hearing this complaint from pilots in the USA as well as all over?" I know dealer for Sirus aircraft and he has no complaints. I know of no one here in USA that is flying the turbo. I think it is to young an engine for us. Not really sure.
I look at the Rotax blogs and do not know where you guys are located although you are pretty active aviation guys.
Regards
Jimmy
On Feb 14, 2013, at 4:09 AM, "Alan Carter" <alancarteresq(at)onetel.net (alancarteresq(at)onetel.net)> wrote:
> --> RotaxEngines-List message posted by: "Alan Carter" <alancarteresq(at)onetel.net (alancarteresq(at)onetel.net)>
>
> Hi Jim.
> Have a 914 thats the one with the Turbo, and that kicks backs, its a dreadful thing to see,the last time i flew was one the 17th December, got the tail plane off at the moment. Hoping to stop it kicking next job ??
> Alan
>
>
>
>
> Read this topic online here:
>
>
>
>
>
>
>
>
>
>
===========
-List" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
|
[b]
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Dick Maddux
Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl
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| Posted: Fri Feb 15, 2013 7:00 am Post subject: reverse prop rotation at shut down |
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I believe I was the one who started this thread. The reverse rotation occurs occasionally on my 912UL if the rpm at shutdown is too high. It can go backward for as much as 3 complete turns ! (great for backing into parking spaces)
Of course I don't have a slipper clutch so that isn't the problem. I have had the gearbox re shimmed and that didn't help. I changed to a lighter prop which did help a little.
Anyway, I think I have the problem solved. If I shut the engine down with the engine rpm about 1200 or less,it doesn't happen. Sometimes you can see at prop stoppage that the prop blade wants to flip backward but at that low rpm ,it doesn't have quite enough inertia.
Dick Maddux
912 UL
[quote][b]
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