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Vic Peters
Joined: 30 Oct 2009
Posts: 54
Location: Millinocket, Maine
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 Posted: Sat Mar 27, 2010 5:13 am Post subject: Warp Drive Propellers |
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Robert,
I discovered early on that if you remove the larger prop bolts (Warp Hub)
first, all that torque
is transfered to the smaller bolts. Now I loosen them first.
Vic in Maine
"The only point I might make, and it may be nothing to worry about, is that
once I was torquing the bolts and
one of the little outboard fellas decided to strip. -no, I didn't
overtorque it, maybe someone else did once?
Anyway, since then I use a lower torque value for those. Not sure what the
number is, I wrote it on the hub."
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_________________
Vic
912ul Xtra
Maine
Too old to cut the mustard but not the cheese. |
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slyck(at)frontiernet.net
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| Posted: Sat Mar 27, 2010 5:23 am Post subject: Warp Drive Propellers |
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Good point Vic, I'll keep that in mind.
Hope you thaw out ok this weekend.
BB
do not archive
On 27, Mar 2010, at 9:13 AM, Vic wrote:
| Quote: |
Robert,
I discovered early on that if you remove the larger prop bolts (Warp Hub) first, all that torque
is transfered to the smaller bolts. Now I loosen them first.
Vic in Maine
"The only point I might make, and it may be nothing to worry about, is that once I was torquing the bolts and
one of the little outboard fellas decided to strip. -no, I didn't overtorque it, maybe someone else did once?
Anyway, since then I use a lower torque value for those. Not sure what the number is, I wrote it on the hub."
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jbhart(at)onlyinternet.ne
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| Posted: Sat Mar 27, 2010 12:45 pm Post subject: Warp Drive Propellers |
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At 05:28 AM 3/27/10 -0700, you wrote:
| Quote: |
Don't tell Sensnich or Jabiru that because Sensenich makes a carbon fiber
prop for Jabiru engines that Jabiru recommends, among others. See
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http://www.sensenich.com/products/browse/14/5/291/0
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Don't tell the Titan Tornado dealer in Utah (Motion Aero) that since
they've built and been flying for years both Jab 2200 and Jab 3300 Tornaods
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with Warp Drive props with no problems. They also have a 3300 with an IVO
composite prop. See http://www.motionaero.com/Engines-Tornado.html and read
captions under top two photos.
Thom,
It is worth noting that the Sensenich is a low inertia two blade propeller
with diameters of 60 to 64 inches. The blades are hollow.
Also the Warp Drive blades used on the Titan Tornado Jabiru engines provide
a 62 inch diameter. Much lower inertia that a 70 to 72 inch Warp Drive
propeller.
Jack B. Hart FF004
Winchester, IN
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Sat Mar 27, 2010 1:37 pm Post subject: Re: Warp Drive Propellers |
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Jack,
Yes indeed.
Of course the primary reason for the shorter diameter is the high rpm prop shaft of the direct drive engines, but reducing the diameter reduces inertia too. Unless my Slingshot gets a lot faster due to my planned efforts to decrease drag, the current TN prop will suffice, and it is very low inertia.
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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