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Search: Posts Made By: lr172
Forum: RV Building Tips/Techniques Today, 12:27 PM
Replies: 13
Views: 145
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 Today, 07:07 AM
Replies: 12
Views: 394
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 Today, 06:54 AM
Replies: 14
Views: 471
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 Yesterday, 08:19 AM
Replies: 28
Views: 1,617
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 Yesterday, 08:12 AM
Replies: 39
Views: 1,994
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 Yesterday, 07:57 AM
Replies: 39
Views: 1,994
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 Yesterday, 07:09 AM
Replies: 28
Views: 1,617
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 Yesterday, 06:57 AM
Replies: 23
Views: 1,701
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: 282
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: 360
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: 13
Views: 559
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: 30
Views: 1,796
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: 360
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: 30
Views: 1,796
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: 28
Views: 1,617
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: 1,966
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: 288
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: 1,994
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: 360
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: 360
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: 30
Views: 1,796
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: 415
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: 415
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: 415
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: 415
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: 189
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: 360
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: 16
Views: 1,508
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: 30
Views: 1,796
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: 701
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: 315
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: Temp / Test / Misc. (posts deleted after 2 weeks) 05-07-2021, 02:33 PM
Replies: 27
Views: 1,395
Posted By lr172
+1 Exercise caution here. Side effects are...

+1 Exercise caution here. Side effects are highly variable. None with my 1st injection, but 2nd was bad. Next morning I was so weak I couldn't get my socks on without assistance.
Forum: Glass Cockpit 05-07-2021, 07:24 AM
Replies: 15
Views: 605
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: 5
Views: 312
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: 27
Views: 850
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: 288
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: 605
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: 936
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: 2,071
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: 432
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: 951
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: 19
Views: 985
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: 506
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: 682
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...
Forum: RV General Discussion/News 05-04-2021, 08:20 AM
Replies: 36
Views: 4,300
Posted By lr172
The clearances are small enough that simple...

The clearances are small enough that simple gravity with the right viscosity oil will not allow the pump to empty and require a prime. However, 80 PSI is a lot of force and while I obviously have...
Forum: RV General Discussion/News 05-04-2021, 08:11 AM
Replies: 36
Views: 4,300
Posted By lr172
They lyc has an over pressure releif...

They lyc has an over pressure releif valve/flapper that will open and allow that air into the system. And yes, 80 PSI, even through an .085 orifice will be enough to evacuate the oil from the...
Forum: RV General Discussion/News 05-04-2021, 07:49 AM
Replies: 36
Views: 4,300
Posted By lr172
Absolutely NO engine is assembled dry. Most use...

Absolutely NO engine is assembled dry. Most use a light assembly grease that is designed to last longer than traditional oil in order to deal with the harsh environment of running the engine for...
Forum: RV Ongoing Maintenance Issues 05-04-2021, 07:39 AM
Replies: 18
Views: 1,266
Posted By lr172
I have heard a few reports from folks that when a...

I have heard a few reports from folks that when a new AFP boost pump was first run after sitting for years that it would run high until they hit it or did something proactive to loosen the stuck...
Forum: Fuel Injection Systems 05-04-2021, 07:04 AM
Replies: 8
Views: 700
Posted By lr172
On the high CHT / low EGT on #1, assuming that...

On the high CHT / low EGT on #1, assuming that only low RPM operations are like this and high power is consistent with other cyl's, I would open the spider and check for debris in the four V shaped...
Forum: Safety 05-04-2021, 06:49 AM
Replies: 27
Views: 2,322
Posted By lr172
Sadly I remember the first time I bought a 2400...

Sadly I remember the first time I bought a 2400 baud modem and doubled the throughput. I often think that my kids should experience that type of device to realize how good they have it today.
Forum: RV-10 05-03-2021, 09:47 AM
Replies: 20
Views: 2,071
Posted By lr172
What are the pink cross hairs for? I have never...

What are the pink cross hairs for? I have never seen those on a G3X. I really miss the CDI cross hairs that the GRT has on my 6 and wonder if that is their role. Much easier to use than the std...
Forum: Electrical Systems 05-02-2021, 07:32 AM
Replies: 2
Views: 535
Posted By lr172
a very interesting study in organizational...

a very interesting study in organizational management. I suspect that the original design team was quite large and designed the two step drilling process for just this reason. Years later, a small...
Forum: Glass Cockpit 05-02-2021, 07:19 AM
Replies: 10
Views: 598
Posted By lr172
answers in line. Much of what you need is in the...

answers in line. Much of what you need is in the installation manual not the pilots guide.
Forum: RV-10 05-02-2021, 07:01 AM
Replies: 20
Views: 2,071
Posted By lr172
at 8000', I cruise at 165 KTAS on 10.5-10.8. ...

at 8000', I cruise at 165 KTAS on 10.5-10.8. Same speed at 14,000 is low 9's GPH.

Adjustable advance EI and tuned injectors.

Larry
Forum: RV-9/9A 05-02-2021, 06:57 AM
Replies: 5
Views: 352
Posted By lr172
can't really rule out carb ice, as prime...

can't really rule out carb ice, as prime conditions for it, but seems a bit unlikely that you would have enough ice to keep your throttle from moving, yet have no noticeable symptoms such as RPM drop...
Forum: Alternative Engines 05-01-2021, 10:58 AM
Replies: 28
Views: 4,149
Posted By lr172
The same reason that you would want a pmag that...

The same reason that you would want a pmag that generates it's own power. If you have to shut off the master due to a fire or your earthx decides to shut itself down as they sometimes do, you want...
Forum: RV-14 05-01-2021, 08:33 AM
Replies: 18
Views: 1,669
Posted By lr172
I do it for better starting performance. When...

I do it for better starting performance. When you hit the starter, bus voltage drops to 10 or lower. This causes the alternator to go to max output. First, it will draw close to 5 amps on the...
Forum: Engine Monitors 05-01-2021, 07:51 AM
Replies: 8
Views: 422
Posted By lr172
The VDO is a resistive sensor and the Kavlico is...

The VDO is a resistive sensor and the Kavlico is a transducer. Swapping will require some wiring work as well, as the transducer requires a 5V power source.
Forum: RV General Discussion/News 05-01-2021, 07:46 AM
Replies: 2
Views: 288
Posted By lr172
If you have FI, there is a pressure take off port...

If you have FI, there is a pressure take off port on the servo that some use. That is where I take it off. In the certified world many use a tee at the carb, so wouldn't be surprised to see it...
Forum: Glass Cockpit 05-01-2021, 07:24 AM
Replies: 10
Views: 500
Posted By lr172
You are taking pressure readings at a point VERY...

You are taking pressure readings at a point VERY close to an intake valve, not in a plenum like on you car. This can introduce reverse flow coditions and cause oscillations. For many, a restrictor...
Forum: Electrical Systems 04-30-2021, 11:05 AM
Replies: 55
Views: 6,646
Posted By lr172
If I had 2 pmags, I would consider some form of...

If I had 2 pmags, I would consider some form of b/u power. A scenario to consider: Elec issue causes the need to disconnect master, battery dies, etc. Pilot on final pulls power back to idle and...
Forum: RV General Discussion/News 04-30-2021, 07:33 AM
Replies: 36
Views: 4,300
Posted By lr172
Most good mechanics take extra measures to...

Most good mechanics take extra measures to pre-oil a new engine before it's first start, as they have learned that significant wear can happen when you start an engine that has been purged of oil. ...
Forum: Electrical Systems 04-29-2021, 01:48 PM
Replies: 42
Views: 1,679
Posted By lr172
Traditional ground straps often have steel...

Traditional ground straps often have steel terminals instead of copper to allow this type of connection.
Forum: Electrical Systems 04-29-2021, 10:54 AM
Replies: 42
Views: 1,679
Posted By lr172
Starters don't have a provision for connecting a...

Starters don't have a provision for connecting a ground cable, as the industry standard (auto AND aircraft) is to ground on the engine block and the starter's contact with the block is the ground...
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