Thorp Air Command - T18.net

Supporting Owners, Builders and Pilots of the Thorp T-18 and its variants.
It is currently Tue Sep 18, 2018 7:17 pm

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 221 posts ]  Go to page Previous  1 ... 11, 12, 13, 14, 15
Author Message
fytrplt
PostPosted: Thu Aug 30, 2018 3:00 pm 
Sr. Member
Sr. Member
User avatar

Joined: Tue Oct 20, 2009 8:07 pm
Posts: 808
Images: 2
Location: Lakeland, Florida, USA
If your elevator hinge is built to plans, the bolt is not the hinge pin. The bushing is the hinge bearing. The bolt captures the bushing. Since the bolt and bushing don't move, the AN365 is the correct nut.

_________________
Bob Highley
N711SH
SN 835
KLAL


Top
 Profile Personal album  
 
Ryan Allen
PostPosted: Thu Aug 30, 2018 6:22 pm 
Sr. Member
Sr. Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 741
Images: 0
Location: Louisiana
jtwigg wrote:
Hi Ryan, a couple notes on the above picture.
1. I used an Adel clamp to go around the trim axle. However, I found I had to take the rubber off the clamp otherwise the metal would easily slide inside the rubber. After that, I put some electrical tape under the clamp to cushion the axle from getting scratched or worn from the clamp.
2. Note that the top of the arm is too high and that I marked an arc on it where I wanted to cut it down so it didn't hit the underside of the cover.
3. The Ray Allen position sensor that seemed to work best for me had the .75" slide travel.
4. Ray Allen recommends that a threaded model aircraft rod and clevis be used instead of a thicker, aviation-style. The hole in the position sensor is very small. The picture shows the threaded model aircraft clevis that I installed.


Good info John. I really appreciate it.


Top
 Profile Personal album  
 
jtwigg
PostPosted: Mon Sep 03, 2018 10:24 am 
Full Member
Full Member

Joined: Thu Sep 03, 2015 10:11 pm
Posts: 127
Images: 0
Successful engine start on Saturday after all the new wiring and throttle/mixture cables were hooked up. The engine sounded great and we took it up to 1700 RPM.

This Lycoming O-290G engine has 191 hours on the tach since converted to an aircraft engine. This is the original engine since N12055 was built in 1974. It is a low-time engine and then sat in a dry hanger for 12 years before I bought the aircraft. I started it two years ago and it ran great, then I removed the cylinders/pistons a year ago to change the O-rings and pushrod seals. There is no corrosion on anything we inspected such as the camshaft or wrist pins, pushrods, etc.

Question - I'm assuming that the rings are seated properly from the '70's. So, in your opinion, is it best when I'm flying it to either 1) run it normally because the engine is already broken in or 2) run it harder to ensure everything is still seated. I'm planning to use regular aviation oil and nothing special.


Attachments:
File comment: Oil pressure is 80 at 1100 RPM
IMG_4783.jpg
IMG_4783.jpg [ 1.57 MiB | Viewed 215 times ]
File comment: N12055 after the engine run and back in the hanger. Not my beer can!
IMG_4799.jpg
IMG_4799.jpg [ 1.78 MiB | Viewed 215 times ]
File comment: Just before N12055 was started
IMG_4782.jpg
IMG_4782.jpg [ 1.98 MiB | Viewed 215 times ]

_________________
John Twigg N12055 SN.79 Pittsburgh, PA (KFWQ)
Top
 Profile Personal album  
 
James Grahn
PostPosted: Mon Sep 03, 2018 10:12 pm 
Hero Member
Hero Member

Joined: Sat Oct 24, 2009 7:16 pm
Posts: 1006
Images: 0
Location: USA
Congrats John. I would think the engine should be good to go. But you dont have to guess. Use your instruments. Check the oil temp, CHTs and oil consumption. Check the quality of the oil within a few tenths.
Cubes


Top
 Profile Personal album  
 
Rich Brazell
PostPosted: Mon Sep 03, 2018 10:23 pm 
Hero Member
Hero Member

Joined: Wed Oct 21, 2009 12:33 pm
Posts: 2875
Images: 64
Location: Jamul, CA (San Diego area)
Compression test ? If all #'s are good I would do what Cubes said . :o

RB O0


Top
 Profile Personal album  
 
Jeff J
PostPosted: Tue Sep 04, 2018 5:45 am 
Sr. Member
Sr. Member

Joined: Wed Aug 31, 2016 8:18 am
Posts: 375
Images: 0
Location: eastern OK
A compression test before running doesn’t hurt but is of very limited value. A cold test will normally yield lower than normal results. If the cylinder walls were oiled/greased during reassembly then they will likely test higher than normal. About the only thing a compression test at this point would reveal is a bad valve (which there shouldn’t be any since since it was just reassembled). I usually wait around 10 hours if I am curious about compression after performing top maintenance to give things a chance to settle in.

_________________
Thorp T18
O-320-B3B (160 HP)
68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


Top
 Profile Personal album  
 
jtwigg
PostPosted: Sun Sep 16, 2018 12:11 am 
Full Member
Full Member

Joined: Thu Sep 03, 2015 10:11 pm
Posts: 127
Images: 0
Just got back from vacation in New York today and back out to the airport tomorrow (Sunday) to work on N12055. The brakes are rebuilt with new o-rings and I received the new hoses yesterday. Got my full coverage insurance for her this week. The (hopefully) final inspection is scheduled for Sat, 9/29. Lots to do yet!

_________________
John Twigg N12055 SN.79 Pittsburgh, PA (KFWQ)


Top
 Profile Personal album  
 
jtwigg
PostPosted: Sun Sep 16, 2018 8:23 pm 
Full Member
Full Member

Joined: Thu Sep 03, 2015 10:11 pm
Posts: 127
Images: 0
Hi Cubes,

How does October look for transition training? I'll be vacationing the first week of October, but the rest of the month is good for me. This training is contingent upon N12055 passing her inspection on 9/29, :o

I tried to PM you twice about this, but it’s not sending for me...

John

_________________
John Twigg N12055 SN.79 Pittsburgh, PA (KFWQ)


Top
 Profile Personal album  
 
jtwigg
PostPosted: Sun Sep 16, 2018 8:37 pm 
Full Member
Full Member

Joined: Thu Sep 03, 2015 10:11 pm
Posts: 127
Images: 0
Hi Jeff and Rich,

I’m going to take your advice (and Cubes) and do a warm compression test probably after doing numerous taxi tests.

I ran the engine again today and it started very easily. It has no mechanical or electric fuel pump, so the best practice found so far for cold starting her is to do 1-2 pumps of the throttle, throttle to idle, then pull about 6-8 blades by hand until I smell gas, then climb in and hit the starter with the throttle cracked. It fires up in 1-2 blades. Hot start was just as easy with throttle cracked and hitting the starter.

I’ll tell you she has good compression pulling the prop by hand!

_________________
John Twigg N12055 SN.79 Pittsburgh, PA (KFWQ)


Top
 Profile Personal album  
 
James Grahn
PostPosted: Sun Sep 16, 2018 11:11 pm 
Hero Member
Hero Member

Joined: Sat Oct 24, 2009 7:16 pm
Posts: 1006
Images: 0
Location: USA
Hi John,
I have Thursday starts in October (Thursday, Friday Saturday). In fact, I'll be in PIT 11, 20, and 25 October.
My number is 702 232-4261. My wife and I leave this Tuesday until the 28th to celebrate our 30th anniversary. We will be in BoraBora, so I'm not sure if I'll get any messages until the 28th.
Cubes


Top
 Profile Personal album  
 
jtwigg
PostPosted: Tue Sep 18, 2018 11:22 am 
Full Member
Full Member

Joined: Thu Sep 03, 2015 10:11 pm
Posts: 127
Images: 0
Happy Anniversary, Cubes! I'll see you when you get back and I'll PM you now that its working for me.

_________________
John Twigg N12055 SN.79 Pittsburgh, PA (KFWQ)


Top
 Profile Personal album  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 221 posts ]  Go to page Previous  1 ... 11, 12, 13, 14, 15

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


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 post attachments in this forum

Search for:
Jump to:  

[ Time : 0.109s | 14 Queries | GZIP : On ]