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JohnDeRosa
August 3rd 12, 04:11 AM
I envy the cobra trailers with a jack that is removable. I can find the jack itself but does anyone know of a source for the bracket? This is the part/clamp that allows that jack to be removed. Anyone have a old rusty jack/bracket lying around?

- John

Wheaton
August 3rd 12, 05:25 PM
Look up Knott GmbH trailers out of Germany. I sourced a tongue damper with very positive results. Check the data plate on your trailer tongue for your equipment mfg.

JohnDeRosa
August 5th 12, 02:59 AM
On Friday, August 3, 2012 11:25:41 AM UTC-5, Wheaton wrote:
> Look up Knott GmbH trailers out of Germany. I sourced a tongue damper with very positive results. Check the data plate on your trailer tongue for your equipment mfg.

This is a (very nice) homebuilt trailer so no dataplate. I am trying to replace the standard "American" jack with a removeable "euro" jack. http://aviation.derosaweb.net/dg101/images/Trailer_hitch_IMG_3405_Large.JPG

JohnDeRosa
August 5th 12, 03:42 AM
Thanks for directing me to http://www.knott-trailer-shop.com. They have exactly what I need.

What seems crazy is how inexpensive the parts are (shipping may be another story). The jack is E19.49 ($24.12) and the bracket is E6.00 ($7.43). Williams Soaring has the jack for $254.30 and the bracket for $44.22. 9.5x more expensive??? Am I missing something?

And I'd like to mention that the http://www.knott-trailer-shop.com web site is one of the best I have used.

- John

Eric Greenwell[_4_]
August 5th 12, 05:33 AM
On 8/4/2012 7:42 PM, JohnDeRosa wrote:
> Thanks for directing me to http://www.knott-trailer-shop.com. They
> have exactly what I need.
>
> What seems crazy is how inexpensive the parts are (shipping may be
> another story). The jack is E19.49 ($24.12) and the bracket is E6.00
> ($7.43). Williams Soaring has the jack for $254.30 and the bracket
> for $44.22. 9.5x more expensive??? Am I missing something?
>
> And I'd like to mention that the http://www.knott-trailer-shop.com
> web site is one of the best I have used.

I've used a swivel jack with wheel on my Cobra trailer for 18 years.
Works well, swivels up out of the way for travel, only $30. Go to
westmarine.com and search for "swivel jack".

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)

August 5th 12, 07:04 PM
http://www.williamssoaring.com/catalog/cobra.html

Williams Soaring has these items in stock.

Regards,
Rex

JohnDeRosa
August 6th 12, 05:53 PM
On Aug 4, 11:33*pm, Eric Greenwell > wrote:
>
> I've used a swivel jack with wheel on my Cobra trailer for 18 years.
> Works well, swivels up out of the way for travel, only $30. Go to
> westmarine.com and search for "swivel jack".
>
> Eric Greenwell

Eric - Thanks for the comment. The type you describe is the type that
I have now and it is fine. But for various reasons having to do with
space considerations I want the removable type. It seems that here in
the US no such item is used or available (except from glider trailer
parts sources). However, in Europe and elsewhere, it is the
standard. It took me a while to figure out that a "swivel jack" in US-
speak is a "jockey wheel" in Euro-speak. American doing its own thing
I guess - and don't even get me started on why we are the only country
that doesn't use metric (except for Liberia and Myanmar!).

- John "Metric" DeRosa

Dan Marotta
August 7th 12, 02:53 AM
So... If you're sinking at 1 meter/sec and cruising at 100 km/hr, what's
your glide ratio?

If you're sinking at 2 kts and flying at 60 kts, what's your glide ratio?

How many km per degree of longitude?

How many nm per degree of longitude?

I could go on...


"JohnDeRosa" > wrote in message
...
On Aug 4, 11:33 pm, Eric Greenwell > wrote:
>
> I've used a swivel jack with wheel on my Cobra trailer for 18 years.
> Works well, swivels up out of the way for travel, only $30. Go to
> westmarine.com and search for "swivel jack".
>
> Eric Greenwell

Eric - Thanks for the comment. The type you describe is the type that
I have now and it is fine. But for various reasons having to do with
space considerations I want the removable type. It seems that here in
the US no such item is used or available (except from glider trailer
parts sources). However, in Europe and elsewhere, it is the
standard. It took me a while to figure out that a "swivel jack" in US-
speak is a "jockey wheel" in Euro-speak. American doing its own thing
I guess - and don't even get me started on why we are the only country
that doesn't use metric (except for Liberia and Myanmar!).

- John "Metric" DeRosa

Eric Greenwell[_4_]
August 7th 12, 06:22 AM
On 8/6/2012 6:53 PM, Dan Marotta wrote:
> So... If you're sinking at 1 meter/sec and cruising at 100 km/hr,
> what's your glide ratio?
>
> If you're sinking at 2 kts and flying at 60 kts, what's your glide ratio?
>
> How many km per degree of longitude?
>
> How many nm per degree of longitude?
>
> I could go on...

I don't fly using glide ratios, so being able to determine them easily
isn't an asset. I use McCready numbers for the speed to fly and for the
glide calculation, which is done by my flight computer. As for km, NM,
and degrees of latitude, I also let the flight computer work it's magic.

Doesn't everybody do it that way now? :^)

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl
- "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what
you need to know tinyurl.com/yfs7tnz

Dan Marotta
August 7th 12, 04:22 PM
Frankly, I see no value in switching. I already have two sets of tools, SAE
and metric. If we switch, then my SAE tools will become redundant.

Heck, my Harley-Davidson requires both sets of tools (sheesh)...


"Eric Greenwell" > wrote in message
...
> On 8/6/2012 6:53 PM, Dan Marotta wrote:
>> So... If you're sinking at 1 meter/sec and cruising at 100 km/hr,
>> what's your glide ratio?
>>
>> If you're sinking at 2 kts and flying at 60 kts, what's your glide ratio?
>>
>> How many km per degree of longitude?
>>
>> How many nm per degree of longitude?
>>
>> I could go on...
>
> I don't fly using glide ratios, so being able to determine them easily
> isn't an asset. I use McCready numbers for the speed to fly and for the
> glide calculation, which is done by my flight computer. As for km, NM, and
> degrees of latitude, I also let the flight computer work it's magic.
>
> Doesn't everybody do it that way now? :^)
>
> --
> Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email
> me)
> - "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
> http://tinyurl.com/yb3xywl
> - "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what
> you need to know tinyurl.com/yfs7tnz

JohnDeRosa
August 7th 12, 08:21 PM
Update - After some research, and after finding the right term to
search for (always the hardest part - "What is that thingy called?") I
have found lots of sources for the Jockey wheel (Australia, Europe)
but none in the US. Shipping is the killer, something like $80-$90
for a $30 part. I did find a beat up used item in Indiana. The
search goes on.

Dan Marotta
August 9th 12, 12:43 AM
So... Why not put a locally sourced wheel on your trailer?

$35 for this:
http://www.etrailer.com/Trailer-Jack/Pro-Series/PSEJ10000101.html


"JohnDeRosa" > wrote in message
...
> Update - After some research, and after finding the right term to
> search for (always the hardest part - "What is that thingy called?") I
> have found lots of sources for the Jockey wheel (Australia, Europe)
> but none in the US. Shipping is the killer, something like $80-$90
> for a $30 part. I did find a beat up used item in Indiana. The
> search goes on.
>

Papa3[_2_]
August 9th 12, 03:52 PM
On Wednesday, August 8, 2012 7:43:02 PM UTC-4, Dan Marotta wrote:
> So... Why not put a locally sourced wheel on your trailer?
>
>
>
> $35 for this:
>
> http://www.etrailer.com/Trailer-Jack/Pro-Series/PSEJ10000101.html

I'm pretty sure John is looking for one where the entire screw-jack-and-wheel can be removed from the mounting bracket.

I looked at the one on my newer Komet trailer, and the bracket is definitely something that could be fabricated locally, albeit not without some effort. Two pieces of steel angle and a steel piano hinge with a threaded insert on the backing plate. A fair amount of drilling and grinding in addition to welding, now that I look at it...

Dan Marotta
August 10th 12, 12:25 AM
There are many styles. The jack that I pointed out can be rotated 90
degrees which makes it parallel with the trailer tongue. Why would you need
to remove it?


"Papa3" > wrote in message
...
On Wednesday, August 8, 2012 7:43:02 PM UTC-4, Dan Marotta wrote:
> So... Why not put a locally sourced wheel on your trailer?
>
>
>
> $35 for this:
>
> http://www.etrailer.com/Trailer-Jack/Pro-Series/PSEJ10000101.html

I'm pretty sure John is looking for one where the entire
screw-jack-and-wheel can be removed from the mounting bracket.

I looked at the one on my newer Komet trailer, and the bracket is definitely
something that could be fabricated locally, albeit not without some effort.
Two pieces of steel angle and a steel piano hinge with a threaded insert on
the backing plate. A fair amount of drilling and grinding in addition to
welding, now that I look at it...

JohnDeRosa
August 10th 12, 02:49 AM
Gentlemen,

The point is not that the "US rotate out of the way" jack is better or
worse than the Euro style. In fact I have one of the US types. Works
great.

The reason I want the Euro style is for space considerations. A
couple of reasons. 1) it is totally removable. 2) the crank is on
the top and not on the side 3) too hard to explain without twenty
seven eight-by-ten color glossy pictures with circles and arrows and a
paragraph on the back of each one.

I found a used one here in the US on eBay.

Thanks, John

Papa3[_2_]
August 10th 12, 03:33 AM
Looks like you got what you needed to go with the tongue, chains, chocks and other implements of destruction...


On Thursday, August 9, 2012 9:49:56 PM UTC-4, JohnDeRosa wrote:
> Gentlemen,
>
>
>
> The point is not that the "US rotate out of the way" jack is better or
>
> worse than the Euro style. In fact I have one of the US types. Works
>
> great.
>
>
>
> The reason I want the Euro style is for space considerations. A
>
> couple of reasons. 1) it is totally removable. 2) the crank is on
>
> the top and not on the side 3) too hard to explain without twenty
>
> seven eight-by-ten color glossy pictures with circles and arrows and a
>
> paragraph on the back of each one.
>
>
>
> I found a used one here in the US on eBay.
>
>
>
> Thanks, John

Dan Marotta
August 10th 12, 03:36 PM
That's great! My posts weren't about US vs. EU, they were about the
difference between $35 and $280. As Ferris Bueller once said, "If you have
the means, you should pick one up..." Of course, he was referring to a
Ferrari.


"JohnDeRosa" > wrote in message
...
> Gentlemen,
>
> The point is not that the "US rotate out of the way" jack is better or
> worse than the Euro style. In fact I have one of the US types. Works
> great.
>
> The reason I want the Euro style is for space considerations. A
> couple of reasons. 1) it is totally removable. 2) the crank is on
> the top and not on the side 3) too hard to explain without twenty
> seven eight-by-ten color glossy pictures with circles and arrows and a
> paragraph on the back of each one.
>
> I found a used one here in the US on eBay.
>
> Thanks, John

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