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JonathanMilbank
Joined: 14 Apr 2012
Posts: 384
Location: Aberdeen area
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 Posted: Sat Nov 04, 2017 5:37 pm Post subject: Turning propeller backwards |
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What if someone's been turning my propeller/Rotax 912ULS backwards through several revolutions? I know in that case oil would be "sucked" out of the hydraulic tappets and damage would/could be caused to the valve train.
Would I hear clattering on engine start and would the noise continue? Or after initial clattering, would the tappets fill within a few minutes and the clattering disappear? The trouble is that someone else did the first start and he didn't report unusual noises.
The engine has subsequently run for two hours including four flights. Should I now undertake investigations for damage and if so, what should I be doing to put this worry behind me? Rocker covers off and look at valve spring caps? Check magnetic plug? Prime the oil system again to purge air out of the tappets?
Your advice would be very welcome, thanks.
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jan_de_jong(at)casema.nl
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| Posted: Sat Nov 04, 2017 11:52 pm Post subject: Turning propeller backwards |
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Maybe put the question to the RotaxEngines list?
On 11/5/2017 2:37 AM, jonathanmilbank wrote:
| Quote: |
What if someone's been turning my propeller/Rotax 912ULS backwards through several revolutions? I know in that case oil will be "sucked" out of the hydraulic tappets and damage would/could be caused to the valve train.
Would I hear clattering on engine start and would the noise continue? Or after initial clattering, would the tappets fill within a few minutes and the clattering disappear? The trouble is that someone else did the first start and he didn't report unusual noises.
The engine has subsequently run for two hours including four flights. Should I now undertake investigations for damage and if so, what should I be doing to put this worry behind me? Rocker covers off and look at valve spring caps? Check magnetic plug? Prime the oil system again to purge air out of the tappets?
Your advice would be very welcome, thanks.
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rlborger(at)mac.com
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| Posted: Sun Nov 05, 2017 8:09 am Post subject: Turning propeller backwards |
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Jan,
Go to Rotax-Owner.com and under support/bulletins you’ll find Engine Manuals. Find the installation, operators and maintenance manuals and download them. In there you’ll find information on how to check your valve train for entrained air and check for any damage.
Blue skies & tailwinds,Bob BorgerEuropa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP3705 Lynchburg Dr.Corinth, TX 76208-5331Cel: 817-992-1117rlborger(at)mac.com (rlborger(at)mac.com)
[quote]On Nov 5, 2017, at 1:51 AM, Jan de Jong <jan_de_jong(at)casema.nl (jan_de_jong(at)casema.nl)> wrote:
--> Europa-List message posted by: Jan de Jong <jan_de_jong(at)casema.nl (jan_de_jong(at)casema.nl)>Maybe put the question to the RotaxEngines list?On 11/5/2017 2:37 AM, jonathanmilbank wrote: | Quote: | --> Europa-List message posted by: "jonathanmilbank" <jdmilbank(at)yahoo.co.uk (jdmilbank(at)yahoo.co.uk)>What if someone's been turning my propeller/Rotax 912ULS backwards through several revolutions? I know in that case oil will be "sucked" out of the hydraulic tappets and damage would/could be caused to the valve train.Would I hear clattering on engine start and would the noise continue? Or after initial clattering, would the tappets fill within a few minutes and the clattering disappear? The trouble is that someone else did the first start and he didn't report unusual noises.The engine has subsequently run for two hours including four flights. Should I now undertake investigations for damage and if so, what should I be doing to put this worry behind me? Rocker covers off and look at valve spring caps? Check magnetic plug? Prime the oil system again to purge air out of the tappets?Your advice would be very welcome, thanks.http://wiki.matronics.com
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