 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
tmclam(at)comcast.net
Guest
|
 Posted: Wed Jun 02, 2010 8:52 am Post subject: TR1 NG2 |
 |
|
Hi OC and others
I threw this firecracker out there because i suddenly realized how much
and how fast KIS lifetime has passed with one of the two problems still
hanging out there.[Some of us will probably go West sooner then later
taking some valuable KIS thoughts with them.]
The Elevator authority problem can be handled with higher approach speed
on a longer runway and/or increasing elevator size [with vortex
generators?]
The Nose Gear weakness is a continuous black cloud overhead because it
can lead to a financial disaster.A collapse and a damaged metal Prop
automatically requires engine removal and Tear Down.The total proper
repair cost cold easily exceed sensible limits and result in scrapping the
airplane.Use a wood prop.
The trigger point for starting this bloody exercise was noting the
Healthy nose gear leg on the new RV12[Light Sport]advertisement pictures.
I have stirred up enough trouble tonight.
Ted
[quote][b]
| | - The Matronics KIS-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?KIS-List |
|
|
|
| Back to top |
|
 |
bakerocb
Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA
|
| Posted: Thu Jun 03, 2010 4:23 am Post subject: TR1 NG2 |
|
|
6/3/2010
Hello Ted, You wrote:
1) "I have stirred up enough trouble tonight."
{Response} No trouble at all -- your inputs have generated some very
valuable thinking about an existing and potential problem.
2) "The Elevator authority problem can be handled with higher approach speed
on a longer runway and/or increasing elevator size [with vortex
generators?]"
{Response} There are really two aspects to the problem of loss of / suddenly
reduced pitch authority in the KIS TR-1 landing flare. One is elevator
authority (as you write) and the other is the airflow burble generated by
intermittent airflow detachment in the pinched in area of the wing to
fuselage fairing.
The elevator authority situation can be approached (as you write) with
either extending the elevator trailing edge or several small vortex
generators installed on the bottom of the trailing edge of the horizontal
stabilizer.
The airflow detachment situation can be approached by either building and
installing larger wing to fuselage fairings as Julian Bone did or installing
a vortex generator on both sides of the fuselage just forward of the wing
leading edge as Cirrus -- and some RV-8 builders -- have done with their
later models. This would create some higher energy air in that pinched in
area.
I am playing around with imitations of the Cirrus approach -- see the
attached picture of a temporarily attached vortex generator. I think that in
order to refine / validate this fuselage installed vortex generator approach
one would have to install video cameras and do some airflow testing with
yarn tufts. That is a bit beyond my motivation.
3) "The trigger point for starting this bloody exercise was noting the
Healthy nose gear leg on the new RV12[Light Sport]advertisement pictures."
{Response} Good eye and good thinking. I think that one would have a better
chance of obtaining a new nose landing gear strut assembly from Van's than
from Diamond, Cirrus, or any of the other manufacturers of that type of nose
gear strut. A salvage yard may also be a source for such a nose gear strut.
The most difficult aspect of replacing the nose landing gear strut may be in
trying to exactly match the firewall attachment arrangement so that one does
not have to do extensive modifications to the firewall in that area.
4) "Use a wood prop."
{Response} A wood prop, rather than a metal prop,would certainly lessen the
impact on an engine when it contacted an object while the engine was
running. But the engine manufactures' instructions on required teardown and
inspection when a prop strike is encountered would not let one off the hook
just because the prop was wood rather than metal.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and
understand knowledge."
======================================================
Time: 09:52:18 AM PST US
From: tmclam(at)comcast.net
Subject: TR1 NG2
Hi OC and others
I threw this firecracker out there because i suddenly realized how much
and how fast KIS lifetime has passed with one of the two problems still
hanging out there.[Some of us will probably go West sooner then later
taking some valuable KIS thoughts with them.]
The Elevator authority problem can be handled with higher approach speed
on a longer runway and/or increasing elevator size [with vortex
generators?]
The Nose Gear weakness is a continuous black cloud overhead because it
can lead to a financial disaster.A collapse and a damaged metal Prop
automatically requires engine removal and Tear Down.The total proper
repair cost cold easily exceed sensible limits and result in scrapping the
airplane.Use a wood prop.
The trigger point for starting this bloody exercise was noting the
Healthy nose gear leg on the new RV12[Light Sport]advertisement pictures.
I have stirred up enough trouble tonight.
Ted
| | - The Matronics KIS-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?KIS-List |
|
| Description: |
|
| Filesize: |
954.26 KB |
| Viewed: |
4169 Time(s) |
|
|
|
| Back to top |
|
|
gbrighton(at)skymesh.com.
Guest
|
| Posted: Thu Jun 03, 2010 4:01 pm Post subject: TR1 NG2 |
|
|
G'Day back Larry,
Re Repairs ...Well have my new leg from Bob
here ok ..its a bit beefier than the original .. in that it is longer in
cord ( funny way to describe a n/leg strut ..but its the airfoil section !)
It doesn't have the doubling that the original one had so i will add
doubling before i go ahead and fit it ...
As to the rear spar wing mounting point repair ... haven't really started
with that but have pretty much thought out that i'll replace the alloy
mounting block is there ...with a longer one that will extend along further
to behind the flap hinge ..so that it acts as a reinforcing doubler .. in
combo with some glassing too ..
Engine wise ...well took the engine back to the Engine Builders ...who
can't find a reason for the inlet valve to have bocken off ...
The Oil Pressure drop was a result of the wire being loose on the seder unit
.the shop was messing with the sender unit earlier !!
What i'm left with is that its an engine head assembly error or just a
freak dodgy valve !?
Was thinking of using a turbo block (subaru) for a base of a new engine way
back ....
but a zero time NA complete engine came up and i went that way (big
mistake ) Read with interest ur article from Maxwell P... and have purchased
a 2.5 sti short block ..in standard turbo trim its 300 HP .... i'll be
running NA with 190-200 hp so it will be somewhat derated so i'm much
happier with that .. ( oh and i'm shopping for a Subaru junker car to use as
a test bed for dyno data recording etc ...)
Decided airframe is no place to be fitting an untried auto conversion hey
.especially with a short runway .. my empty weight 1020 lbs and standard
TR1 wing ... its not going to be a great off-field lander ...!!!!!
Scott's extra span and light weight should see a fantastic ( low) stall
speed ... promises to be a real special a/craft ...
For Now
Graham
| | - The Matronics KIS-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?KIS-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
