Thorp T18 Plans question

I'm helping an aero engineer friend research details of successful
homebuilt aircraft undercarriages. (for some calcs for a book)

I borrowed my mate's T18 Plans, from which he built a honey of a T18.
my mate used a prebuilt and tempered Brock undercarriage so didnt need
or buy the undercarriage drawings. the very drawing I need is missing
and since he bought a fully assembled component he has no real idea
what the materials were that were used in the gear. btw the Brock gear
has done over a thousand hours so far without a single problem so
Ken's work endures as a memorial to his talent.

I have a partial copy of drawing 516 which gave the bolt sizes used to
attach the gear.

Drawing 515 has the details I need.
if you look at the gear leg it starts at the top attach point, runs
down through a sleeve for about the centre 3/5th of the leg, to which
the centre attach point is welded, then down beyond the sleeve it
terminates in a plate to which a cessna style bolt on axle gets
fitted. (the axle and brakes are actually a cleveland set)

is the centre component of the gear leg a tube or a rod? my builder
friend couldnt say. what are it's dimensions, wall thickness etc.
what are the dimensions of the sleeve, wall thickness etc?
what are the dimensions of the crosstube tube?
what is the thickness of the wraparound plate that the neoprene
components and washers are bolted through?
I'm assuming it was all made from 4130, is that correct?

I know it was heat treated to 180,000 psi ultimate.

appreciate a help from anyone with a full plans set.
Stealth Pilot
Australia.

Pazmany's book on Landing Gear has a detailed sketch of the T-18
landing gear, as well as an in-depth discussion of landing gear
analysis.

http://www.pazmany.com/books/books.html

It's the best book on the subject.

Stealth Pilot wrote:
I'm helping an aero engineer friend research details of successful
homebuilt aircraft undercarriages. (for some calcs for a book)

I borrowed my mate's T18 Plans, from which he built a honey of a T18.
my mate used a prebuilt and tempered Brock undercarriage so didnt
need
or buy the undercarriage drawings. the very drawing I need is missing
and since he bought a fully assembled component he has no real idea
what the materials were that were used in the gear. btw the Brock
gear
has done over a thousand hours so far without a single problem so
Ken's work endures as a memorial to his talent.

I have a partial copy of drawing 516 which gave the bolt sizes used
to
attach the gear.

Drawing 515 has the details I need.
if you look at the gear leg it starts at the top attach point, runs
down through a sleeve for about the centre 3/5th of the leg, to which
the centre attach point is welded, then down beyond the sleeve it
terminates in a plate to which a cessna style bolt on axle gets
fitted. (the axle and brakes are actually a cleveland set)

is the centre component of the gear leg a tube or a rod? my builder
friend couldnt say. what are it's dimensions, wall thickness etc.
what are the dimensions of the sleeve, wall thickness etc?
what are the dimensions of the crosstube tube?
what is the thickness of the wraparound plate that the neoprene
components and washers are bolted through?
I'm assuming it was all made from 4130, is that correct?

I know it was heat treated to 180,000 psi ultimate.

appreciate a help from anyone with a full plans set.
Stealth Pilot
Australia.

On 3 Jan 2005 09:52:54 -0800, "flybynightkarmarepair"
wrote:

Pazmany's book on Landing Gear has a detailed sketch of the T-18
landing gear, as well as an in-depth discussion of landing gear
analysis.

http://www.pazmany.com/books/books.html

It's the best book on the subject.

ok maybe currently the best book on the subject. :-)

I've found that the T18 parts are tubes but still need the wall
thickness callouts.

thanks for the suggestion but I'm after the actual data not someones
published opinions on it.
Stealth Pilot

Page 163 of Paz's book has all the detail you're looking for. But I'm
not going to tell you, neener, neener, neener!!!


Ryan "Only Too Willing to Spout My Own Opinions, But Not Too Cheap To
BUY Good Information" Young

{Say "I'm a bloomin' snide POM, SIR!" and I'll quote you the diameters
and wall thicknesses}
and have you tried the T-18 group?
http://groups.yahoo.com/group/thorplist

On 3 Jan 2005 21:09:52 -0800, "flybynightkarmarepair"
wrote:

Page 163 of Paz's book has all the detail you're looking for. But I'm
not going to tell you, neener, neener, neener!!!


Ryan "Only Too Willing to Spout My Own Opinions, But Not Too Cheap To
BUY Good Information" Young

{Say "I'm a bloomin' snide POM, SIR!" and I'll quote you the diameters
and wall thicknesses}
and have you tried the T-18 group?
http://groups.yahoo.com/group/thorplist

where you go wrong stupid is that I didnt ask for details from
Pazmany's book.
I wanted details from drawing 515 of Thorp's plan set. one of only 3
drawings I dont have sitting in a box beside me just now.

I have no idea whether paz got his details right.
I suspect that you have no idea either.
Stealth Pilot

I have Paz's book sitting in front of me ... and it does not have any
dimensions. Only the tube sizes. It does not contain any details of the
fittings, axels etc.



"Stealth Pilot" wrote in message
...
On 3 Jan 2005 21:09:52 -0800, "flybynightkarmarepair"
wrote:

Page 163 of Paz's book has all the detail you're looking for. But I'm
not going to tell you, neener, neener, neener!!!


Ryan "Only Too Willing to Spout My Own Opinions, But Not Too Cheap To
BUY Good Information" Young

{Say "I'm a bloomin' snide POM, SIR!" and I'll quote you the diameters
and wall thicknesses}
and have you tried the T-18 group?
http://groups.yahoo.com/group/thorplist

where you go wrong stupid is that I didnt ask for details from
Pazmany's book.
I wanted details from drawing 515 of Thorp's plan set. one of only 3
drawings I dont have sitting in a box beside me just now.

I have no idea whether paz got his details right.
I suspect that you have no idea either.
Stealth Pilot