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tc1917(at)bellsouth.net
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 Posted: Mon Apr 27, 2009 2:04 am Post subject: harmonics |
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Okay, round two. The prop I installed on my slingshot was a warp three
blade with taper tips, 66 inches. Way shorter than my 70 incher. The
blades were smooth and clean as they should be, not full of cloth marks AND
the blades were even, instead of one tip being skinnier. The second time I
installed them I had the plane tied down and really ran it up. As it were,
the pitch was not correct at 12 and a half degrees, needed more but it was a
lot quieter than mine. Only problem was the harmonics were still there. I
could hear it better with this prop. It is definately coming from the
engine. It is not rolling, just making the harmonics sound. Although I
believe I would be better off with new and better blades from WD, I dont at
this time feel they would send them to me because I dont think they are the
actual culprit, only the device to amplify the sound. The blades are still
crap. I do not know where to go next. I guess I will have to go to Florida
and pay to have it checked out at Lockwood and if it is a warranty issue,
maybe they can fix it. I have plenty of proof it was there from the
beginning. Other than that, I guess I will have to live with it. Sorry, I
thought for a fleeting minute I had the cure. Ted Cowan, Alabama,
Slingshot, 912UL
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Mon Apr 27, 2009 4:53 am Post subject: harmonics |
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Although I
| Quote: | believe I would be better off with new and better blades from WD, I dont
at this time feel they would send them to me because I dont think they are
the actual culprit, only the device to amplify the sound. The blades are
still crap. I do not know where to go next.
|
Ted Cowan
You have been giving Warp Drive a pretty bad rap about your prop.
I believe Warp Drive stands behind their life time guarantee of
satisfaction, but they can do nothing if you do not communicate with them.
If I was as dissatisfied with my prop as you seem to be, instead of whining
on the internet and doing nothing, I think I would pick up the telephone and
get working on a solution.
I have been flying Warp Drive Props for 16 years and over 3,000 hours, on
912's, on Kolb aircraft. Never had a prop problem I did not create myself.
Along the way I haven't heard of defective Warp Drives, and I am sure Daryl
does not want a single one out there to tarnish his company's good
reputation.
It is about 220 miles from your airstrip to Ronnie Smith's airstrip, a three
hour flight. Takes about an hour to pull the gearbox, inspect it, reshim
it, and put it back on the engine. A quick and simple job. A lot closer
than Lockwood in Sebring, FL. If you didn't want to fly, you can pull the
gear box and drive to Ronnie's, or box it up and ship it to him. Gearbox
removal on a 912 is a quick and easy job.
Warp Drive can not fix your problem if you do not talk to them. Daryl said
he had not heard from you in well over a year.
john h
mkIII
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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jbhart(at)onlyinternet.ne
Guest
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| Posted: Mon Apr 27, 2009 5:53 am Post subject: harmonics |
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Ted,
Sounda likw you are making progress. If your original propeller was a three blade, the move from 72 to 66 inches gave you a decrease in propeller interia. It would be interesting to see what would happen if you could borrow a lower inertia propeller, such as, a Powefin.
Jack B. Hart FF004
Wichester, IN
At 05:03 AM 4/27/09 -0500, you wrote:
| Quote: |
Okay, round two. The prop I installed on my slingshot was a warp three
blade with taper tips, 66 inches. Way shorter than my 70 incher. The
blades were smooth and clean as they should be, not full of cloth marks AND
the blades were even, instead of one tip being skinnier. The second time I
installed them I had the plane tied down and really ran it up. As it were,
the pitch was not correct at 12 and a half degrees, needed more but it was a
lot quieter than mine. Only problem was the harmonics were still there. I
could hear it better with this prop. It is definately coming from the
engine. It is not rolling, just making the harmonics sound. Although I
believe I would be better off with new and better blades from WD, I dont at
this time feel they would send them to me because I dont think they are the
actual culprit, only the device to amplify the sound. The blades are still
crap. I do not know where to go next. I guess I will have to go to Florida
and pay to have it checked out at Lockwood and if it is a warranty issue,
maybe they can fix it. I have plenty of proof it was there from the
beginning. Other than that, I guess I will have to live with it. Sorry, I
thought for a fleeting minute I had the cure. Ted Cowan, Alabama,
Slingshot, 912UL
|
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