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Search: Posts Made By: lr172
Forum: Traditional Aircraft Engines Today, 10:25 AM
Replies: 5
Views: 363
Posted By lr172
Looks about right. might be helpfull to leave...

Looks about right. might be helpfull to leave the mags on and off for a longer time to get more readable results.

You should see similar behavior with top and bottom plugs. Maybe slight...
Forum: RV-10 Today, 08:05 AM
Replies: 14
Views: 1,009
Posted By lr172
a Point to add here is that new mags will quickly...

a Point to add here is that new mags will quickly lose their egap (internal timing) in the first 100 hours. Egap changes with point and follower wear and a new mag will often "wear in" in the first...
Forum: Traditional Aircraft Engines Today, 08:02 AM
Replies: 3
Views: 161
Posted By lr172
Yes, it is just below the venturi, where you want...

Yes, it is just below the venturi, where you want to measure carb air temp.
Forum: RV-12/RV-12iS Today, 07:56 AM
Replies: 14
Views: 439
Posted By lr172
The red cube DOES have an impeller, though you...

The red cube DOES have an impeller, though you are correct that it uses an optical sensor to count the impeller revolutions. The K factor is used to convert fractional impeller revolutions to GPH. ...
Forum: RV General Discussion/News Today, 07:10 AM
Replies: 12
Views: 920
Posted By lr172
What I read: "I started to notice in the yellow...

What I read:

"I started to notice in the yellow on #1"

"Next swapped Alcor 86255 EGT probes between #1 & 3 and test flew again"

"#3 registered high"

What did I miss that makes you think the...
Forum: RV Ongoing Maintenance Issues Today, 06:34 AM
Replies: 8
Views: 423
Posted By lr172
If a governor change immediately eliminated the...

If a governor change immediately eliminated the problem, even if for a short time, that is further evidence that the governor is the source of the problem and something is preventing it from...
Forum: RV-14 Yesterday, 09:27 AM
Replies: 4
Views: 603
Posted By lr172
VR senses bus voltage and outputs more the...

VR senses bus voltage and outputs more the further below the voltage setpoint the bus gets. Resistance on the sense circuit causes the VR to see a lower voltage and cranks up the output.

From my...
Forum: RV General Discussion/News Yesterday, 07:35 AM
Replies: 12
Views: 920
Posted By lr172
Thermocouples are sensitive to poor wiring...

Thermocouples are sensitive to poor wiring connections, so maybe start there. If problems move with a probe swap, seems logical that the probe or wiring is to blame.
Forum: Traditional Aircraft Engines Yesterday, 07:11 AM
Replies: 3
Views: 183
Posted By lr172
Generally, when one plug stops firing, that...

Generally, when one plug stops firing, that cylinders EGT will go up around 100* over normal at high power levels. Several ignition failure modes can also cause various noises, including clicking. ...
Forum: RV Ongoing Maintenance Issues 05-16-2021, 10:31 AM
Replies: 8
Views: 423
Posted By lr172
If the engine is truly "surging" in RPM, I would...

If the engine is truly "surging" in RPM, I would start with the prop governor as it is the most likely culprit. You can get surging from being too lean, but suspect many other symptoms to appear as...
Forum: RV-10 05-16-2021, 08:14 AM
Replies: 10
Views: 877
Posted By lr172
I do not consider the doors on the 10 to be very...

I do not consider the doors on the 10 to be very strong. I have good confidence that if I can get the door un-lathced, a few solid kicks will allow it to snap apart at the hinges. There is a lot of...
Forum: Traditional Aircraft Engines 05-16-2021, 07:52 AM
Replies: 5
Views: 363
Posted By lr172
When you go from two spark events to one, you...

When you go from two spark events to one, you should expect to see a good EGT rise on each cylinder, along with a small RPM drop. If the EGT rise and RPM drop is not reasonably consistent between...
Forum: RV General Discussion/News 05-15-2021, 11:22 AM
Replies: 7
Views: 274
Posted By lr172
+1 The bushing OD is the same for the 3/8 and...

+1

The bushing OD is the same for the 3/8 and 7/16 versions. The 1/2" version has a larger OD. If the 320 crank trully has 1/2" bushings, that means someone drilled out the holes in the flange and...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-14-2021, 10:35 AM
Replies: 20
Views: 2,534
Posted By lr172
Seems like a reasonable question. Engine is...

Seems like a reasonable question. Engine is portrayed as excellent running and reliable, so many may also wonder why someone would spend $50K to replace such a excellent engine;; I know that I did. ...
Forum: RV-6/6A 05-14-2021, 07:58 AM
Replies: 23
Views: 1,255
Posted By lr172
Some of the UV curing urethanes are quite strong....

Some of the UV curing urethanes are quite strong. This is what your dentist uses to rebuild damaged teeth and they take A LOT of abuse. I used one to attach my targa strip. Also, the Gflex from...
Forum: RV-14 05-13-2021, 07:45 AM
Replies: 8
Views: 660
Posted By lr172
Assuming you are at idle. Afterfires (unlikely...

Assuming you are at idle. Afterfires (unlikely they were back fires) that occur on throttle reduction to idle are often caused by either leaks in the exhaust tube connection at the cylinder or too...
Forum: COMM 05-13-2021, 07:38 AM
Replies: 23
Views: 1,184
Posted By lr172
+1 I have archers on both planes and fly IFR in...

+1

I have archers on both planes and fly IFR in both. I also get VORs out to 80+ miles and have never not received a localizer or GS signal no matter how far out I was vectored onto the approach...
Forum: Traditional Aircraft Engines 05-13-2021, 07:09 AM
Replies: 10
Views: 1,227
Posted By lr172
+1 This is what I would do. If there is damage,...

+1

This is what I would do. If there is damage, it is already done, so no need to worry about it now, as long as everything spins over smoothly. I would wait for 5 hours of run time before...
Forum: Glass Cockpit 05-12-2021, 10:51 AM
Replies: 3
Views: 205
Posted By lr172
Do the calibration again. system should show...

Do the calibration again. system should show about .5 volts or less at one extreme and around 4.5 volts or greater at the other. If you are substantially off from those, you either have a wiring...
Forum: Traditional Aircraft Engines 05-12-2021, 10:37 AM
Replies: 23
Views: 1,347
Posted By lr172
I will add that my 6 has less vibration and flys...

I will add that my 6 has less vibration and flys better with the std plate. However the 20 pounder significantly increase my baggage carrying capacity, so I accept it. All of the vibration issues...
Forum: Traditional Aircraft Engines 05-12-2021, 07:38 AM
Replies: 23
Views: 1,347
Posted By lr172
My vibrations change a bit each time I loosen the...

My vibrations change a bit each time I loosen the prop bolts. Granted, I don't have any significant vibration issues, but Sam at Sabre was clear that it is important to equallize the weight of the...
Forum: RV Building Tips/Techniques 05-11-2021, 12:27 PM
Replies: 17
Views: 562
Posted By lr172
+1 I would use this over #3 for NPT. ...

+1

I would use this over #3 for NPT. Non-hardening is best for NPT. EZ turn is a lubricant and not a sealant. Best to stick with thread sealant.
Forum: Traditional Aircraft Engines 05-11-2021, 07:07 AM
Replies: 23
Views: 1,347
Posted By lr172
I also have a 20# crush plate and much care must...

I also have a 20# crush plate and much care must be taken when tightening prop bolts. You have to manually take the weight off so that the plate centers itself. If you don't the weight causes it to...
Forum: Traditional Aircraft Engines 05-11-2021, 06:54 AM
Replies: 16
Views: 744
Posted By lr172
+1 I put two 250 watt stick on heaters on the...

+1

I put two 250 watt stick on heaters on the oil sump of my 540. I usually block the cowl inlets and put a moving blanket over the cowl. In 2-4 hours, oil is 70* and cylinders are a good delta...
Forum: Glass Cockpit 05-10-2021, 08:19 AM
Replies: 30
Views: 2,032
Posted By lr172
This makes a lot of sense. The same trim motor...

This makes a lot of sense. The same trim motor is used on the two seat models and the 10, yet on the 10 that same motor must move two tabs that are almost twice the size of the one tab on the 2 seat...
Forum: Electronic Ignition Systems 05-10-2021, 08:12 AM
Replies: 39
Views: 2,169
Posted By lr172
Agreed. I would expect ANY experimental EFIS to...

Agreed. I would expect ANY experimental EFIS to have a high likelihood of failure following a lightning strike. That said, if anyone took on effort to minimize it, it would be garmin, as they may...
Forum: Electronic Ignition Systems 05-10-2021, 07:57 AM
Replies: 39
Views: 2,169
Posted By lr172
Not a double EE, but pretty confident that many...

Not a double EE, but pretty confident that many things can be done to the airframe and the electronics to deal with lightning suppression. Decades ago I was in the telecom business and all of the...
Forum: Glass Cockpit 05-10-2021, 07:09 AM
Replies: 30
Views: 2,032
Posted By lr172
Autotrim and trim control in general does not...

Autotrim and trim control in general does not require the GAD 27 in a G3X system. Just relays and switches wired like you would normally in a non-efis plane, Just take the output of them into the 28...
Forum: Safety 05-10-2021, 06:57 AM
Replies: 24
Views: 2,440
Posted By lr172
You're an idiot :D sorry, couldn't resist. Well...

You're an idiot :D

sorry, couldn't resist. Well stated comments that I think help us all to re-think how we approach things in a physically disconnected world. It does seem that a lot gets lost in...
Forum: Autopilots 05-09-2021, 02:46 PM
Replies: 12
Views: 385
Posted By lr172
Check your config. I think the G3x uses a unique...

Check your config. I think the G3x uses a unique setting for talking to an external AP via ARINC. I don't think it is EFIS / AIR DATA. Suspect the G5 is the same.

Larry
Forum: Glass Cockpit 05-09-2021, 12:26 PM
Replies: 7
Views: 406
Posted By lr172
Well, I got it working today. The manual is...

Well, I got it working today. The manual is clear to set ignore SEL CRS for VLOC, but says nothing about the SEL CRS for GPS option. I changed that to allow and all works as expected now. Press...
Forum: Propellers 05-09-2021, 09:50 AM
Replies: 37
Views: 1,734
Posted By lr172
When you pulled the prop off did you see evidence...

When you pulled the prop off did you see evidence that oil was flowing to the prop.

I agree with others that it can take a decent amount of effort to get all the air out of a new hub for the first...
Forum: RV-14 05-09-2021, 09:25 AM
Replies: 35
Views: 2,480
Posted By lr172
I understand that no one was suggesting anything...

I understand that no one was suggesting anything but full power in an emergency. I was just adding that there are many factors in play and in some circumstances it may be possible that a pilot will...
Forum: Glass Cockpit 05-09-2021, 09:10 AM
Replies: 7
Views: 406
Posted By lr172
Thanks Bob. Will try that today. Larry

Thanks Bob. Will try that today.

Larry
Forum: RV-14 05-09-2021, 08:50 AM
Replies: 35
Views: 2,480
Posted By lr172
+1 for a good counter opinion. I once landed on...

+1 for a good counter opinion.

I once landed on a nasty, windy day and as I started to level off I got a strong 10' rapid sink/down draft and almost pancacked, even with full throttle application. ...
Forum: Glass Cockpit 05-09-2021, 08:27 AM
Replies: 30
Views: 2,032
Posted By lr172
You designed a system for which you clearly don't...

You designed a system for which you clearly don't understand fully how it operates under ALL conditions. That is your right and no one is suggesting it is not. However, it would seem that those...
Forum: RV General Discussion/News 05-09-2021, 08:21 AM
Replies: 19
Views: 2,223
Posted By lr172
I am in Chicago (30 min flight) and willing to...

I am in Chicago (30 min flight) and willing to provide some guidance. PM if interested.

Larry
Forum: RV General Discussion/News 05-09-2021, 08:12 AM
Replies: 4
Views: 389
Posted By lr172
I have sat in the line at OSH for 40 minutes with...

I have sat in the line at OSH for 40 minutes with NO CHT issues. At idle levels, the engine simply is not being fed enough fuel to generate the heat required to produce objectionable CHT levels. ...
Forum: Electronic Ignition Systems 05-09-2021, 07:59 AM
Replies: 39
Views: 2,169
Posted By lr172
In context of this discussion, YES. WHile the...

In context of this discussion, YES. WHile the Pmag has it's own power source to insulate itself from loss of electrical source issues on the airframe, it is still a microprocessor based piece of...
Forum: Glass Cockpit 05-08-2021, 12:43 PM
Replies: 7
Views: 406
Posted By lr172
Yes and I have seen this: Enabling/disabling OBS...

Yes and I have seen this:

Enabling/disabling OBS Mode (with external GPS navigator
configured):
1) Press the OBS Key on the external navigator. The ‘Set OBS and Hold’ Active Flight Plan Page menu...
Forum: Glass Cockpit 05-08-2021, 12:34 PM
Replies: 7
Views: 406
Posted By lr172
That would make sense. On the other plane with...

That would make sense. On the other plane with GRT, the 430 doesn't ask for course. It just goes into OBS mode and the OBS can be adjusted via the heading knob. I have gone round and round with...
Forum: RV-14 05-08-2021, 10:14 AM
Replies: 35
Views: 2,480
Posted By lr172
Agreed, but the 10 and assuming the 14 to a...

Agreed, but the 10 and assuming the 14 to a lesser degree, requires WAY more stick force to control in this case than the 6. Own both of them. That said, I have a 160HP and FP prop, so expect other...
Forum: Fuel Injection Systems 05-08-2021, 10:11 AM
Replies: 11
Views: 557
Posted By lr172
Also, the old injectors were single components...

Also, the old injectors were single components without a separate restrictor.
Forum: Fuel Injection Systems 05-08-2021, 08:37 AM
Replies: 11
Views: 557
Posted By lr172
Your instinct/recollection was correct. From...

Your instinct/recollection was correct. From the AFP site:

INSTALLING THE NOZZLE LINE
Torque the nozzle line B-nut to 20-25 inch pounds or seat the B-nut finger tight then
tighten the B-nut an...
Forum: Fuel Injection Systems 05-08-2021, 08:34 AM
Replies: 11
Views: 557
Posted By lr172
I just go by feel. However, that may not be a...

I just go by feel. However, that may not be a good recommendation for someone without a lot of years of wrenching to develop that feel.

You need to go beyond snug, but remember that you are not...
Forum: Fuel Injection Systems 05-08-2021, 08:28 AM
Replies: 11
Views: 557
Posted By lr172
I don't use a torque wrench for those. However,...

I don't use a torque wrench for those. However, those nuts aren't supposed to be that tight like a nut on a bolt, as you can damage the brass ball / socket fittings inside.

Pretty sure that AFP...
Forum: RV Ongoing Maintenance Issues 05-08-2021, 07:51 AM
Replies: 2
Views: 239
Posted By lr172
Do you have the old ones? O-rings often have...

Do you have the old ones? O-rings often have standardized numbers, but always follow an ID, OD, Thickness spec. If you can determine those measurements, you can get them at Mcmaster Carr or...
Forum: Glass Cockpit 05-08-2021, 07:40 AM
Replies: 7
Views: 406
Posted By lr172
OBS mode with G3X

Hoping someone can help me sort this out. I am trying to figure out how to use the OBS mode in my G3X - 430W setup. Lets say ATC asked me to go to a waypoint (I am using GPS for guidance) on a...
Forum: RV-14 05-08-2021, 07:07 AM
Replies: 17
Views: 1,938
Posted By lr172
The crack in the attach bracket would seem to...

The crack in the attach bracket would seem to indicate that the mid to upper left side of the fairing hit a stationary object. No issues with the screws would caused the attach bracket to crack...
Forum: RV-14 05-08-2021, 06:56 AM
Replies: 35
Views: 2,480
Posted By lr172
I do not have a 14, but the 10 seems very similar...

I do not have a 14, but the 10 seems very similar in it's wing and Horiz stab design.

In the 10, this is an area where a good amount of practice is required; probably more so in the 10 with it...
Forum: RV Building Tips/Techniques 05-07-2021, 03:16 PM
Replies: 15
Views: 875
Posted By lr172
most of the fleet uses AN bolts for this...

most of the fleet uses AN bolts for this application and they have a tensile of 125K and shear of 75K.

There are numerous SS bolts the meet or exceed this strength, though some are less. Mcmaster...
Forum: Traditional Aircraft Engines 05-07-2021, 03:05 PM
Replies: 4
Views: 391
Posted By lr172
NO That provides an overflow path for the fuel...

NO

That provides an overflow path for the fuel if the internal diaphragm ruptures.
Forum: Glass Cockpit 05-07-2021, 07:24 AM
Replies: 15
Views: 637
Posted By lr172
You should stop looking at that raw data, as you...

You should stop looking at that raw data, as you have no idea what it is used for or what it is supposed to show on the ground. I doubt anyone but GRT knows what that data is and what it is used...
Forum: Traditional Aircraft Engines 05-07-2021, 07:12 AM
Replies: 6
Views: 462
Posted By lr172
The cap just sits on top of the end of the valve...

The cap just sits on top of the end of the valve stem. If you can see the the two valve retainer clips, the cap is not installed. When the cap is installed, it almost completely fills the OD of the...
Forum: Glass Cockpit 05-07-2021, 07:03 AM
Replies: 28
Views: 1,020
Posted By lr172
Mine is in the same spot with no issues. I...

Mine is in the same spot with no issues. I picked that area, as the that small piece of material is very rigid, with three supporting connections very close.

Larry
Forum: RV-10 05-07-2021, 06:52 AM
Replies: 8
Views: 368
Posted By lr172
be cautious here. the starting and ending...

be cautious here. the starting and ending calibration values are going to be different for every plane as the builder does their own bending of the sending arm. This will create unique high and low...
Forum: Glass Cockpit 05-06-2021, 11:11 AM
Replies: 15
Views: 637
Posted By lr172
How did you confirm that the IAS is accurate? I...

How did you confirm that the IAS is accurate? I thought you had to convert to TAS nad compare to GS.

GRT has an offset for adding or subtracting from the TAS before presentation to the pilot. You...
Forum: RV Ongoing Maintenance Issues 05-06-2021, 11:03 AM
Replies: 18
Views: 1,019
Posted By lr172
+1 We called it varnish and is very common in...

+1

We called it varnish and is very common in lawnmower and other engines that are not used much. It usually is a darker yellow to tan color. I assume it is not the gas, but one of the additives....
Forum: RV-10 05-06-2021, 07:54 AM
Replies: 20
Views: 2,369
Posted By lr172
The numbers that I posted are pretty much the...

The numbers that I posted are pretty much the same when solo or full gross. I have done several trips at gross and it is very repeatable, though the GPH may be .1 or .2 higher but in the range.

I...
Forum: Reviews 05-06-2021, 06:44 AM
Replies: 2
Views: 490
Posted By lr172
I had a similar issue (found a broken ring) and...

I had a similar issue (found a broken ring) and received similar service. Sent me a whole new cyl assy. It took two weeks, as they had no stock and even sent the replacement overnight Sat delivery...
Forum: Traditional Aircraft Engines 05-06-2021, 06:37 AM
Replies: 14
Views: 1,027
Posted By lr172
You can remove the dam to bring down the #2 temps...

You can remove the dam to bring down the #2 temps in climb and accept a lower CHT in cruise, which may not really be much lower without it. You could also build a little box under the #2 inlet ramp...
Forum: RV-6/6A 05-05-2021, 11:03 AM
Replies: 23
Views: 1,255
Posted By lr172
All are on the Tipper skin and many are outside...

All are on the Tipper skin and many are outside of the windshield area, if I remember correctly. Some will also be under the fibergless transition work, though you can probably still get a lot of...
Forum: Glass Cockpit 05-04-2021, 11:03 AM
Replies: 10
Views: 563
Posted By lr172
I have two portrait screens. One PFD and the...

I have two portrait screens. One PFD and the other Map/engine. Similar to a side by side large screen. I also use a large Ipad with foreflight just right of the avionics stack. I really like...
Forum: RV Building Tips/Techniques 05-04-2021, 09:24 AM
Replies: 7
Views: 725
Posted By lr172
I thought most single part sealants need either...

I thought most single part sealants need either oxygen or moisture to cure. How would that happen in an air tight environment under a cap? I vaguely remember polysulphides requiring moisture to...
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