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  #1  
Old 12-19-2021, 05:12 AM
Larry DeCamp Larry DeCamp is offline
 
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 1,259
Default HP Aircraft wing tip

FWIW, my home made tips from Steve Smithís generous guidance save weight. Steve coached me after I asked him about flat tip merit, before the HP commercial relationship developed.

In addition to the 3mph speed increase they are six pounds lighter than 415 tips. 2.5 lb each vs 5.5ea for 415ís. Mine are made of 3layer glass and due to the curved surfaces they are very stiff.
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RV3B sold
RV-4 fastback in process w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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  #2  
Old 12-19-2021, 05:36 AM
Skysailor Skysailor is offline
 
Join Date: May 2011
Location: Atlanta, GA
Posts: 311
Default Pics?

Not exactly the internet standard of "Pictures, or it didn't happen." but would like to see them if you could post some shots.
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  #3  
Old 12-19-2021, 10:22 AM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 3,203
Default

The HP Aircraft LLC short tips are now shipping with provision for lights (nav + strobe). The set that Bob made for me are super light, since they are just 2 plies of 12 oz Knytex. I weighed them today and they are 2.5 lb.

I'll post pictures of the tips installed tomorrow after I get them on. Paint drying.
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Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
also
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2021

Last edited by scsmith : 12-19-2021 at 06:56 PM.
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  #4  
Old 12-20-2021, 09:04 AM
andoman andoman is offline
 
Join Date: Jul 2006
Location: Payson, AZ
Posts: 77
Default

I found some pix at the HP Aircraft LLC website here: https://hpaircraftblog.wordpress.com...-through-rv-8/
The pix are of tips without the lighting provision so I’m looking forward to seeing Steve’s installed units.
I have a Rocket I’m finishing up that has 715 bat-wing tips. Those HP stubbies would certainly be a worthwhile mod.

Question: does HP’s provision for the lights mirror the Van’s provision enough for the the Fly LED kits to be used?

PS: I learned a new word: pultruded. Quite the eclectic collection products that HP offers. Wish I had an L-39 that needed to loose its tip tanks…
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"The plane won't build itself..." RV-7A N7.62MM sold
-RV4 purchased. Extensive refurbishment complete. ďTakes off by itís self, flys hands off, lands by itís self...Ē
-HRII project: paint and panel to go!

Last edited by andoman : 12-20-2021 at 09:13 AM.
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  #5  
Old 12-20-2021, 11:40 AM
PhatRV PhatRV is offline
 
Join Date: Mar 2018
Location: Buena Park, California
Posts: 863
Default

Quote:
Originally Posted by scsmith View Post
The HP Aircraft LLC short tips are now shipping with provision for lights (nav + strobe). The set that Bob made for me are super light, since they are just 2 plies of 12 oz Knytex. I weighed them today and they are 2.5 lb.

I'll post pictures of the tips installed tomorrow after I get them on. Paint drying.
This thing needs a picture (Taper wings for RV8)
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RV8 (N38PV): 90% completed (90% to go)
Short List for Hangar !
Days to Final Installation: 999
Days to AWC: 999
Days to First Flight: 999
Painting: 85% completed
Donation paid through 2022
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  #6  
Old 12-20-2021, 02:49 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 3,203
Default

Quote:
Originally Posted by PhatRV View Post
This thing needs a picture (Taper wings for RV8)
We periodically post updates on the tapered composite wing project in a separate thread, but we are probably overdue. We have closed the wings, and chased all but one fuel tank leak. Should have that one fixed next weekend. Bob Mills has match-drilled the aluminum stub spars to fit his Rocket-6.

Next up will be a static load test, end of January. In the mean time, I am starting to work on the ailerons and flaps.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
also
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2021
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  #7  
Old 12-20-2021, 02:53 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 3,203
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Quote:
Originally Posted by andoman View Post
Question: does HP’s provision for the lights mirror the Van’s provision enough for the the Fly LED kits to be used?
The light cavity is sized to accept the AeroLEDs Pulsar modules. The FlyLED's fellow has developed a kit for these tips and I believe the first set is in the mail to Bob K.

Here are a couple of pictures.
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sorry I should have made sure the aileron was positioned right. The match-up is perfect

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Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
also
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2021

Last edited by scsmith : 12-20-2021 at 03:00 PM.
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  #8  
Old 12-20-2021, 05:19 PM
Bob Kuykendall's Avatar
Bob Kuykendall Bob Kuykendall is offline
 
Join Date: Sep 2006
Location: Vallecito, CA
Posts: 600
Default

Quote:
Originally Posted by andoman View Post
Question: does HPís provision for the lights mirror the Vanís provision enough for the the Fly LED kits to be used?
Good question! In fact, Fly LEDs has already developed a nav/strobe kit for these wingtips. I'm getting one on order so I can assemble and install it in a set.
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Low-drag wingtips for RV-4 through RV-8
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  #9  
Old 12-20-2021, 07:53 PM
emsvitil's Avatar
emsvitil emsvitil is offline
 
Join Date: Oct 2019
Location: SoCal
Posts: 661
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How much drag does the clear lens and screws add?

In other words, how flush can you make it................
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  #10  
Old 12-20-2021, 11:35 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 3,203
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Quote:
Originally Posted by emsvitil View Post
How much drag does the clear lens and screws add?

In other words, how flush can you make it................
Not sure you could even measure the drag difference in any case, but the degree of flushness depends somewhat on your workmanship and time investment. The recess is approximately the same depth as the thickness of the lens material, but not exactly. The lens is not perfectly uniform in thickess either.

So, if you want it really perfectly flush, you can build up the mating surface with epoxy/microballoons (or bondo) until the lens is as flush as you like.

The molded shape of the lens is very good - it better be, it was made on a plug that was cast in the tip mold. I found that it helps to make the attachment screw holes a little over size so the lens can settle where it likes best
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
also
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2021
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