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hans.erstad(at)gmail.com
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 Posted: Wed Aug 07, 2013 10:06 am Post subject: TR-1 Nose gear leg - again |
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I have the original design round tube nose gear leg. As I remember it was said it was heat treated, but I no not really know .
Since all the bad experiences with the nose grear, I have been careful, and only operated from asphalt runways. However, on the weekend I flew to an airfield with grass runway. When arriving home I discovered that the leg have been bent. The straight portion of the leg is still straight, so it must be the bend at the lower end that have been bent further.
The bending is not much, and I could keep on flying, but I should really do something. Have it checked for cracking, and then keep on flying (never from grass again) or have it bent back to its original chape, or have the bent part replaced, or..............
This topic have been covered well in the past, but if anyone have some experience to share with me?
regards
Hans Christian
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Robert Reed
Joined: 22 Oct 2009
Posts: 331
Location: Dallas/Ft.Worth
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| Posted: Wed Aug 07, 2013 10:18 am Post subject: TR-1 Nose gear leg - again |
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Hans,
I am no expert on this but bending it back sounds like a very bad idea to me. Any bending of parts like the landing gear puts stress on the metal and should be followed by inspection and heat treating.
Just my opinion, no scientific facts.
Bob Reed
From: Hans Christian Erstad <hans.erstad(at)gmail.com>
To: kis-list(at)matronics.com
Sent: Wednesday, August 7, 2013 1:06 PM
Subject: KIS-List: TR-1 Nose gear leg - again
I have the original design round tube nose gear leg. As I remember it was said it was heat treated, but I no not really know .
Since all the bad experiences with the nose grear, I have been careful, and only operated from asphalt runways. However, on the weekend I flew to an airfield with grass runway. When arriving home I discovered that the leg have been bent. The straight portion of the leg is still straight, so it must be the bend at the lower end that have been bent further.
The bending is not much, and I could keep on flying, but I should really do something. Have it checked for cracking, and then keep on flying (never from grass again) or have it bent back to its original chape, or have the bent part replaced, or..............
This topic have been covered well in the past, but if anyone have some experience to share with me?
regards
Hans Christian
[quote][b]
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galinhdz(at)gmail.com
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| Posted: Wed Aug 07, 2013 12:17 pm Post subject: TR-1 Nose gear leg - again |
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If this is a TR4, I would recommend replacing it with the newer version. The TR4 has a much heavier nose weight and I find even the newer version is barely strong enough. I don't know about the TR1.
Galin
On Wed, Aug 7, 2013 at 2:06 PM, Hans Christian Erstad <hans.erstad(at)gmail.com (hans.erstad(at)gmail.com)> wrote:
[quote] I have the original design round tube nose gear leg. As I remember it was said it was heat treated, but I no not really know .
Since all the bad experiences with the nose grear, I have been careful, and only operated from asphalt runways. However, on the weekend I flew to an airfield with grass runway. When arriving home I discovered that the leg have been bent. The straight portion of the leg is still straight, so it must be the bend at the lower end that have been bent further.
The bending is not much, and I could keep on flying, but I should really do something. Have it checked for cracking, and then keep on flying (never from grass again) or have it bent back to its original chape, or have the bent part replaced, or..............
This topic have been covered well in the past, but if anyone have some experience to share with me?
regards
Hans Christian
[b]
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fredorosa(at)gmail.com
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| Posted: Wed Aug 07, 2013 1:10 pm Post subject: TR-1 Nose gear leg - again |
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[img]cid:ii_1405a9cd96f78693[/img]Galin,
It appears that you have an early TR4 nose gear with a bent continuous tube. My gear is a later and I believe much stronger TR 4 gear design. I think Lyle Hendricks made these but am not sure of this. If you bend the distortion back it will be considerably weaker and will distort again maybe even on paved landing strips.
My advice is to have the new design made up and replace the original nose gear.
Al
On Wed, Aug 7, 2013 at 2:06 PM, Hans Christian Erstad <hans.erstad(at)gmail.com (hans.erstad(at)gmail.com)> wrote:
| Quote: | I have the original design round tube nose gear leg. As I remember it was said it was heat treated, but I no not really know .
Since all the bad experiences with the nose grear, I have been careful, and only operated from asphalt runways. However, on the weekend I flew to an airfield with grass runway. When arriving home I discovered that the leg have been bent. The straight portion of the leg is still straight, so it must be the bend at the lower end that have been bent further.
The bending is not much, and I could keep on flying, but I should really do something. Have it checked for cracking, and then keep on flying (never from grass again) or have it bent back to its original chape, or have the bent part replaced, or..............
This topic have been covered well in the past, but if anyone have some experience to share with me?
regards
Hans Christian
|
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fredorosa(at)gmail.com
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| Posted: Wed Aug 07, 2013 1:16 pm Post subject: TR-1 Nose gear leg - again |
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Hans,Now I realize that this is a TR1 we are talking about so disregard my first post. Thing to do is to have an identical tube made up of heavier gauge 4130 steel tube. It would be better to have the welded angle rather than the bent one. In any case, don't attempt to bend the gear back to it's original shape. It will only make it weaker.
Al
On Wed, Aug 7, 2013 at 5:10 PM, Alfred Rosa <fredorosa(at)gmail.com (fredorosa(at)gmail.com)> wrote:
| Quote: | [img]cid:ii_1405a9cd96f78693[/img]Galin,
It appears that you have an early TR4 nose gear with a bent continuous tube. My gear is a later and I believe much stronger TR 4 gear design. I think Lyle Hendricks made these but am not sure of this. If you bend the distortion back it will be considerably weaker and will distort again maybe even on paved landing strips.
My advice is to have the new design made up and replace the original nose gear.
Al
On Wed, Aug 7, 2013 at 2:06 PM, Hans Christian Erstad <hans.erstad(at)gmail.com (hans.erstad(at)gmail.com)> wrote:
| Quote: | I have the original design round tube nose gear leg. As I remember it was said it was heat treated, but I no not really know .
Since all the bad experiences with the nose grear, I have been careful, and only operated from asphalt runways. However, on the weekend I flew to an airfield with grass runway. When arriving home I discovered that the leg have been bent. The straight portion of the leg is still straight, so it must be the bend at the lower end that have been bent further.
The bending is not much, and I could keep on flying, but I should really do something. Have it checked for cracking, and then keep on flying (never from grass again) or have it bent back to its original chape, or have the bent part replaced, or..............
This topic have been covered well in the past, but if anyone have some experience to share with me?
regards
Hans Christian
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mantafs(at)earthlink.net
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| Posted: Wed Aug 07, 2013 6:34 pm Post subject: TR-1 Nose gear leg - again |
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The main issue with the nose gear is the main gear location!
On most trigear aircraft the main gear is placed so that about 85% to 92% of the load is carried by the main gear and only 8% to 15% is carried by the nose gear with a loaded aircraft. On the TR-1 with the stock main gear location the nose gear has about 30% of the load! Twice what it should and twice what the nose gear is designed to hold.
So if you have not done so already move your main gear forward. The simplest way is to angle it forward by making a flox wedge shim between the gear and the gear tunnel. Not only will this reduce the load on your nose gear it will make takeoffs and landing much more smooth.
If your nose loads are what they should be and you land on the mains you should have no problem with the original nose gear.
Regards,
Mark Kettering
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