OS .90 C-Spec with pump
05-18-2004 | 10:49 PM
#1
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From: Bangkok, THAILAND
OS .90 C-Spec with pump
Hey Heli guys,
Just a quick question for you perry pump familiar guys. I recently purchased a Raptor .90 with a OS.90 C-spec motor with pump. Ive had about 10 flights on it so far, other than it being quite thirsty it has run absolutely flawless and smooth. My only concern is the perry pump with regard to longevity and reliability. In my book simplicity leads to reliability and am curious if any one out there has any ideas/suggestions as to the expected longevity of the pump and what its potential failure modes are. Is it a diaphram type pump? And if so, will the diaphram deteriorate over time or is it of a durable material. I have heeded the warning in the OS manual to run it completely dry at the end of the day and will continue to do so. In hindsight, was the pump really necessary or is it just another potential weakest link in the chain? Happy flying and any landing you walk away from is a good one!
Just a quick question for you perry pump familiar guys. I recently purchased a Raptor .90 with a OS.90 C-spec motor with pump. Ive had about 10 flights on it so far, other than it being quite thirsty it has run absolutely flawless and smooth. My only concern is the perry pump with regard to longevity and reliability. In my book simplicity leads to reliability and am curious if any one out there has any ideas/suggestions as to the expected longevity of the pump and what its potential failure modes are. Is it a diaphram type pump? And if so, will the diaphram deteriorate over time or is it of a durable material. I have heeded the warning in the OS manual to run it completely dry at the end of the day and will continue to do so. In hindsight, was the pump really necessary or is it just another potential weakest link in the chain? Happy flying and any landing you walk away from is a good one!
05-20-2004 | 05:23 PM
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From: Baker City, OR,
RE: OS .90 C-Spec with pump
Hi,
Since no one has replied yet, I love mine so far. I have half the flights you have but as you noted it is a very smooth running engine. It was turning over at an idle on the first start and I turned off the starter without realizing the engine was already running.
As far as pumped engines go my OS (Ebay) engine with pump (91 surpass) still runs great after many flights and I have not seen a pump problem with it yet. I figure the pump is more of a benefit with consistent fuel flow regardless of tank volume.
So far the OS C-Spec gets an A+
Since no one has replied yet, I love mine so far. I have half the flights you have but as you noted it is a very smooth running engine. It was turning over at an idle on the first start and I turned off the starter without realizing the engine was already running.
As far as pumped engines go my OS (Ebay) engine with pump (91 surpass) still runs great after many flights and I have not seen a pump problem with it yet. I figure the pump is more of a benefit with consistent fuel flow regardless of tank volume.
So far the OS C-Spec gets an A+
05-21-2004 | 02:11 AM
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From: Bangkok, THAILAND
RE: OS .90 C-Spec with pump
Hi,
Thanks for the input. I too have to agree with your A+ rating of this motor. Just hope the pump is as reliable as the rest of OS workmanship. My instructor told me not to worry about the pump. He said its like calling Toyota and asking them how reliable the fuel pumps in their cars are. Guess thats one way to look at it.
Regards, -J-
Thanks for the input. I too have to agree with your A+ rating of this motor. Just hope the pump is as reliable as the rest of OS workmanship. My instructor told me not to worry about the pump. He said its like calling Toyota and asking them how reliable the fuel pumps in their cars are. Guess thats one way to look at it.
Regards, -J-
