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scottmschmidt(at)yahoo.co
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 Posted: Fri Aug 08, 2008 9:23 am Post subject: Wheel Pant Support Nuts - Nylock to all metal nut |
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After I returned from Oshkosh I had to change the oil and was checking the whole plane out to make sure everything was in tip top shape. I noticed that I had developed a little bit of play in my main wheel pants and thought I had better pull it all apart and look into it. I could move the back of the wheel pant up and down about 3/8 (right) to 1/2" (left).
There are 3 bolts that hold the bracket in place and they were a little loose. Since they go through some aluminum spacers and had some leverage I thought they might have just deformed the aluminum and needed to be tightened. Unfortunately you have to pull the wheel off to get to the other side of these bolts.
After pulling the wheel I noticed that the nuts had lost most of their locking function. Van's recommends a nylock bolt. I know I have had those brakes hot in the past and most likely overheated the elastic material in the nut. I could almost turn them off by hand. So I am not sure if the bolts backed off or just became looser because of some deformation of the aluminum where the spacer and bracket touch but I thought I had better use something different.
If you are still building or have the wheels off sometime you may want to replace these bolts with an all metal nut stop style nut (picture attached). (Or you could go with cross-drilled rotors with dual caliper Brembo brakes to reduce heating)
By doing this the nuts would help them be less susceptible to the heat and possible loosening.
On a side note, my Goodyear Flight Custom III tires are wearing so much less than the stock tires.
I now have over 125 hours on these tires and can hardly tell they are wearing at all. I'm very impressed.
Scott Schmidtscottmschmidt(at)yahoo.com
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Fri Aug 08, 2008 10:58 am Post subject: Wheel Pant Support Nuts - Nylock to all metal nut |
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Scott your observation is dead on.
The use of the MS nuts without nylon inserts is a prudent choice. I also love larger mass rotors, dual calipers and as William Curtis will tell everyone H-5606 lines other than Nylaflow(which are cheap, easy to install, swell and don't help you in a caliper fire). I even love vented and grooved rotors but that is another tangent. Tim James RV-10 features larger stock "certified" Cessna gear which enhances the already stellar performance of the world's finest 4 passenger cruiser. There is little downside to improved braking and both Brembo or Beringer are great products to consider.
My son who is 25 loves to soup up his car. For those under 30, it always seems to be more horsepower, cold induction, modified exhaust and Nitrous. I always retort - Brakes, then Suspension then speed mods - Getting old is the pits.
Safety is enhanced when the potential for fire is reduced and performance is expanded. Better braking is one of those seven factors that I love and East Coasters seem to take exception to. The first Wright Flyer had skids. We have come a long way on the road to improvements and fire resistant fluids. Those using the stock VAN supplied nyloc nuts get an easy installation, but they will hopefully factor in your "First Person" observation early in their build process. Safety is underrated. Your comments make the RV-10 list unique in the OBAM community for its sharing of ideas worthy of consideration.
John Cox
Do not Archive
PS - Barnaby Wainfan's (Kitplanes Mag) entire three years of articles which have all the engineering data to support my wild recommendations is coming soon to DVD. It is a great Xmas stocking stuffer. I might just subsidize it or pressure Marc Cook to offer it for an annual contribution to Matronics in November. Eecks, that time again.
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Scott Schmidt
Sent: Thursday, August 07, 2008 4:41 PM
To: RV-10 List
Subject: Wheel Pant Support Nuts - Nylock to all metal nut
After I returned from Oshkosh I had to change the oil and was checking the whole plane out to make sure everything was in tip top shape. I noticed that I had developed a little bit of play in my main wheel pants and thought I had better pull it all apart and look into it. I could move the back of the wheel pant up and down about 3/8 (right) to 1/2" (left).
There are 3 bolts that hold the bracket in place and they were a little loose. Since they go through some aluminum spacers and had some leverage I thought they might have just deformed the aluminum and needed to be tightened. Unfortunately you have to pull the wheel off to get to the other side of these bolts.
After pulling the wheel I noticed that the nuts had lost most of their locking function. Van's recommends a nylock bolt. I know I have had those brakes hot in the past and most likely overheated the elastic material in the nut. I could almost turn them off by hand. So I am not sure if the bolts backed off or just became looser because of some deformation of the aluminum where the spacer and bracket touch but I thought I had better use something different.
If you are still building or have the wheels off sometime you may want to replace these bolts with an all metal nut stop style nut (picture attached). (Or you could go with cross-drilled rotors with dual caliper Brembo brakes to reduce heating)
By doing this the nuts would help them be less susceptible to the heat and possible loosening.
On a side note, my Goodyear Flight Custom III tires are wearing so much less than the stock tires.
I now have over 125 hours on these tires and can hardly tell they are wearing at all. I'm very impressed.
Scott Schmidt
scottmschmidt(at)yahoo.com
[quote][b]
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billderou(at)yahoo.com
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| Posted: Fri Aug 08, 2008 12:20 pm Post subject: Wheel Pant Support Nuts - Nylock to all metal nut |
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I think if you look closer you will find the U1008 spacer has galled the large bracket giving you the impression that the nuts have backed off. Real problem is a washer is needed between the U1008 and the bracket and make new spacers out of 1/2" AL rod or add steel sleeves to the existing U1008. Then you will be able to tighten the three bolts.
Bill DeRouchey
N939SB, flying
--- On Thu, 8/7/08, Scott Schmidt <scottmschmidt(at)yahoo.com> wrote:
| Quote: | From: Scott Schmidt <scottmschmidt(at)yahoo.com>
Subject: Wheel Pant Support Nuts - Nylock to all metal nut
To: "RV-10 List" <rv10-list(at)matronics.com>
Date: Thursday, August 7, 2008, 4:41 PM
After I returned from Oshkosh I had to change the oil and was checking the whole plane out to make sure everything was in tip top shape. I noticed that I had developed a little bit of play in my main wheel pants and thought I had better pull it all apart and look into it. I could move the back of the wheel pant up and down about 3/8 (right) to 1/2" (left).
There are 3 bolts that hold the bracket in place and they were a little loose. Since they go through some aluminum spacers and had some leverage I thought they might have just deformed the aluminum and needed to be tightened. Unfortunately you have to pull the wheel off to get to the other side of these bolts.
After pulling the wheel I noticed that the nuts had lost most of their locking function. Van's recommends a nylock bolt. I know I have had those brakes hot in the past and most likely overheated the elastic material in the nut. I could almost turn them off by hand. So I am not sure if the bolts backed off or just became looser because of some deformation of the aluminum where the spacer and bracket touch but I thought I had better use something different.
If you are still building or have the wheels off sometime you may want to replace these bolts with an all metal nut stop style nut (picture attached). (Or you could go with cross-drilled rotors with dual caliper Brembo brakes to reduce heating)
By doing this the nuts would help them be less susceptible to the heat and possible loosening.
On a side note, my Goodyear Flight Custom III tires are wearing so much less than the stock tires.
I now have over 125 hours on these tires and can hardly tell they are wearing at all. I'm very impressed.
Scott Schmidtscottmschmidt(at)yahoo.com
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[quote][b]
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http://www.matronics.com/Navigator?RV10-List |
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