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01-20-2015, 05:55 AM
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Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 834
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How Straighten Prop ?
I have an old FP metal prop that I want to strip down and polish to hang on my wall. The tips are bent from a ground-strike.
Any suggestions on the best way to straighten these? I have had problems straightening aluminum in the past. If I heat it I often melt a spot before I get the piece red (and this might leave a discoloration that I can't polish out). If I don't heat sometimes it cracks. Looking for some experienced help.
I am going to cut the very tips off to remove some deep gouges, but I didn't want to cut a lot off each end.
Thanks in advance - the knowledge base here is amazing!
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01-20-2015, 06:01 AM
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Join Date: Jan 2010
Location: Tybee Island, GA
Posts: 664
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Prop
If you do straighten the prop, i would like to ask you to stamp it permanently somewhere in the hub section with the words " Scrap" or "unairworhty" Personally, a bent prop hung to a wall adds more character and the story grows each time with it! Check aC 43-13. Chapter 12 Section 3 talks about standard repair procedures
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Mitch V.
Semi-Retired in Tybee Island GA
2007 MX2 Nigel Lamb EX RBAR MX2 (Current)
2020 MX2 New Kit Position (Sold at OSH to Team RV Member)
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2008 MXS Green Slime"(Sold)
2007 MX2 Patches" (Sold)
1999 Giles 202 "Primal Fear/Perucho" (Sold)
1965 PA32-260 "God Bless America" (Sold)
2003 RV6 "Airhawk One" (Sold)
Last edited by mv031161 : 01-20-2015 at 06:06 AM.
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01-20-2015, 06:26 AM
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Join Date: Oct 2008
Location: Utah
Posts: 8,159
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Leave it bent
I've seen a polished (or chromed) bent prop blade as an art. Looks great!
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01-20-2015, 07:12 AM
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Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 834
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Quote:
Originally Posted by mv031161
If you do straighten the prop, i would like to ask you to stamp it permanently somewhere in the hub section with the words " Scrap" or "unairworhty" Personally, a bent prop hung to a wall adds more character and the story grows each time with it! Check aC 43-13. Chapter 12 Section 3 talks about standard repair procedures
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Good Idea - I'll stamp it |
01-20-2015, 07:13 AM
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Join Date: Jan 2005
Location: Peachtree City, Ga
Posts: 1,041
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Bent prop
I've heard guys say they put a plank over it and drove their truck over the planks to straighten bent props.
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Vern Darley
Awarded FAA "The Wright Brothers 'Master Pilot' Award"- for 50 years safe flying
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Falcon RV Squadron Founder
KFFC Hanger D-30
Peachtree City, Ga
770 310-7169
EAA Technical Counselor #5142
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ATP/CFI/A&P/DAR
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01-20-2015, 07:58 AM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,150
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I would leave it bent - it's an automatic conversation starter.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now. 
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01-20-2015, 08:02 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by pa38112
... If I heat it I often melt a spot before I get the piece red (and this might leave a discoloration that I can't polish out). ...
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Aluminum doesn't turn color when heated, which is a challenge.
You could always cut it down and make both sides even again, assuming it is just the tips that are curled.
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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01-20-2015, 08:33 AM
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Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 834
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I did not bend this prop, and don't know who did - so not much of a conversation to be had there. - Also, it is not a pretty bend like many I have seen, and is asymmetrical from one end to the other.
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01-20-2015, 10:13 AM
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Join Date: Jan 2005
Location: Cartersville, Georgia KVPC
Posts: 945
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Quote:
Originally Posted by pa38112
I did not bend this prop, and don't know who did - so not much of a conversation to be had there.
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Then do what any pilot worth his salt would do.....make one up! 
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Moose
VAF #136
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01-20-2015, 10:17 AM
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Join Date: Mar 2007
Location: 45G, Brighton, MI
Posts: 1,867
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Quote:
Originally Posted by Michael White
Then do what any pilot worth his salt would do.....make one up! |
The standard in EAA Chapter 1000 is 10% truth and you're good to go!
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Miles (VAF# 1238, Paid up as of 2018)
RV-7 TU 904KM (reserved)
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1955 Cessna 170B flying since 1982
'To get something you never had, you have to do something you never did.' -Unk.
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