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Search: Posts Made By: lr172
Forum: Primers Yesterday, 09:08 AM
Replies: 11
Views: 417
Posted By lr172
We need to find what the OP means by primer. ...

We need to find what the OP means by primer. High build 2K primer is very different than epoxy primer, etc. A 1.7 or 1.8 tip is great for high build or other surfacing products, but will create...
Forum: Electronic Ignition Systems Yesterday, 08:56 AM
Replies: 21
Views: 963
Posted By lr172
Another reason to be very careful about where you...

Another reason to be very careful about where you get your advice and guidance. I run 35* of advance at idle on my 320 to improve idle performance. At 1000 it is back to 23, but find that it helps...
Forum: RV General Discussion/News Yesterday, 08:49 AM
Replies: 37
Views: 2,937
Posted By lr172
There are ground sink connections for both master...

There are ground sink connections for both master warning and master caution. Run 12V to an led (12V style, not stock LEDs) or incandescent lamp and then to these pins and you will have annunciation...
Forum: RV-3 11-27-2022, 12:26 PM
Replies: 57
Views: 2,691
Posted By lr172
glad it is going in the right direction. ...

glad it is going in the right direction. However, I am struggling to see how you picked up 30 knots by REMOVING the fairings. Not an Aero engineer, but wonder how that is possible without those...
Forum: Primers 11-27-2022, 12:11 PM
Replies: 14
Views: 702
Posted By lr172
No stress in hardened / tempered aluminum or...

No stress in hardened / tempered aluminum or un-hardened 6061-O for that matter; Not dealing with cast iron or welded steel here. I would NOT use bead blasting. Simple maroon pad (320-400 grit). ...
Forum: Traditional Aircraft Engines 11-27-2022, 10:04 AM
Replies: 21
Views: 965
Posted By lr172
I use the -4 ORB tap on the RSA to feed a block...

I use the -4 ORB tap on the RSA to feed a block that has both a transducer and a -4 return line to the tank. The return line has a valve to open and close the circuit. I use this to purge hot fuel...
Forum: RV Ongoing Maintenance Issues 11-27-2022, 09:46 AM
Replies: 4
Views: 211
Posted By lr172
Sounds right. Full rich is not full flow. The...

Sounds right. Full rich is not full flow. The servo uses airflow as the primary means to meter fuel. With the boost pump on, I would NOT expect pressures below 25 when full rich without the engine...
Forum: RV-14 11-21-2022, 11:20 AM
Replies: 7
Views: 449
Posted By lr172
thats what i did. I also used flox to insure a...

thats what i did. I also used flox to insure a snug fit.
Forum: RV Ongoing Maintenance Issues 11-21-2022, 11:01 AM
Replies: 8
Views: 678
Posted By lr172
There is a larger copper bar in that starter to...

There is a larger copper bar in that starter to feed the windings and mine cracked with very similar symptoms. Cranked but very sluggish. Never checked voltage drop.
Forum: Traditional Aircraft Engines 11-21-2022, 09:15 AM
Replies: 16
Views: 2,529
Posted By lr172
Possibly you don't live in a cold climate. Your...

Possibly you don't live in a cold climate. Your point about cranking is very valid and needs to be heeded by all without exception. However, there is simply no way you are going to get a lycoming...
Forum: Traditional Aircraft Engines 11-21-2022, 09:09 AM
Replies: 18
Views: 1,246
Posted By lr172
Given my thoughts and what I just read above, I...

Given my thoughts and what I just read above, I don't think you want me to tell you that. Send it to ASI and see what they can do for you.
Forum: RV-10 11-21-2022, 09:01 AM
Replies: 31
Views: 2,601
Posted By lr172
Pretty sure vans thinks that if you get shimmy,...

Pretty sure vans thinks that if you get shimmy, you should make and install wooden leg dampers. They went so far as to include the drawings and instructions for making and installing them in my 6A...
Forum: Traditional Aircraft Engines 11-20-2022, 02:16 PM
Replies: 18
Views: 1,246
Posted By lr172
Pretty sure that don't make helicoils that fat. ...

Pretty sure that don't make helicoils that fat. They are made to drill out just past the thread major diameter then re-tap, netting the same thread as original. You can probably find or make an...
Forum: RV-10 11-20-2022, 01:23 PM
Replies: 31
Views: 2,601
Posted By lr172
Not an aerospace engineer, but from what I have...

Not an aerospace engineer, but from what I have read, round is the very worst shape for drag.

Larry
Forum: Traditional Aircraft Engines 11-20-2022, 01:03 PM
Replies: 16
Views: 2,529
Posted By lr172
FYI, for a plate to act as a true choke, it must...

FYI, for a plate to act as a true choke, it must be upstream of the jets. Closing the throttle plate only reduces airflow. It does not increase the amount of fuel flowing relative to that air. ...
Forum: Traditional Aircraft Engines 11-20-2022, 12:56 PM
Replies: 16
Views: 2,529
Posted By lr172
Glad it helped someone. About 30* today and a...

Glad it helped someone. About 30* today and a guy on the ramp was just about to burn up his starter. 30 seconds of tips/education and it fired right up. Most don't realize the inverse, exponential...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-20-2022, 10:31 AM
Replies: 28
Views: 2,760
Posted By lr172
+1 I use ATF in my brakes and there should be no...

+1

I use ATF in my brakes and there should be no issue adding ATF to 5606 in order to get home. I would recommend getting rid of it later and properly refilling with one or the other once home.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-20-2022, 10:29 AM
Replies: 28
Views: 2,760
Posted By lr172
Yes, that can't be discounted. Hopefully he has...

Yes, that can't be discounted. Hopefully he has the clear lines and has confirmed that the right side lines are either clear or pink. That will be definitive. Was there a puddle of fluid under the...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-20-2022, 10:17 AM
Replies: 28
Views: 2,760
Posted By lr172
can't help in getting you fluid. However, it...

can't help in getting you fluid. However, it seems very unlikely to me that simply cold weather alone caused fluid loss and suggest you get him an oring for the calipar as well, assuming he actually...
Forum: Electrical Systems 11-20-2022, 10:02 AM
Replies: 10
Views: 738
Posted By lr172
In my case it was simply having an alt field...

In my case it was simply having an alt field breaker that couldn't satisfy the current required by the voltage regulator at full output. I fully understood at the time why it was tripping. My point...
Forum: Painting your RV 11-20-2022, 09:56 AM
Replies: 5
Views: 436
Posted By lr172
most metallic flake in paint is Mica, not metal. ...

most metallic flake in paint is Mica, not metal. However, there are countless different types used, so cannot say that ALL of it is non-metallic.
Forum: RV-10 11-20-2022, 09:32 AM
Replies: 31
Views: 2,601
Posted By lr172
I can't help but wonder if what makes this so...

I can't help but wonder if what makes this so variable (I have none on my 10) is the Toe. Last winter I restored a jeep for my son. We lifted it and did a bunch of front suspension work. WIth big...
Forum: RV-10 11-20-2022, 09:24 AM
Replies: 31
Views: 2,601
Posted By lr172
From my reading here, it would seem that from...

From my reading here, it would seem that from your list, the leg dampers are most likely to reduce it.
Forum: Traditional Aircraft Engines 11-20-2022, 09:05 AM
Replies: 20
Views: 1,509
Posted By lr172
I use EI and also have variable advance via a...

I use EI and also have variable advance via a pot, thought not this brand. Generally speaking rich mixtures like less advance and lean mixtures like more. Much above 25", I am at 25 degrees and...
Forum: Traditional Aircraft Engines 11-19-2022, 12:07 PM
Replies: 9
Views: 727
Posted By lr172
Yes, adding washers to see if the pressures come...

Yes, adding washers to see if the pressures come up is a great idea and certainly not discouraging it. However, I speculate that it won't help that much in the mid RPM ranges, maybe at 2700. The...
Forum: RV-10 11-19-2022, 08:47 AM
Replies: 31
Views: 2,601
Posted By lr172
+1 I have no issues with this on my 10 and...

+1

I have no issues with this on my 10 and haven't seem many others post about it either. I do believe that tire pressure can calm or excite this issue on the smaller models. I run 45 PSI on the...
Forum: Electrical Systems 11-19-2022, 08:17 AM
Replies: 10
Views: 738
Posted By lr172
Why do we need a compromise? I would argue that...

Why do we need a compromise? I would argue that one of the benefits of CB's on the panel is knowing if one has Popped and having the ability to easily reset it. Not sure how having this under the...
Forum: Electrical Systems 11-19-2022, 08:16 AM
Replies: 10
Views: 738
Posted By lr172
Why do we need a compromise. I would argue that...

Why do we need a compromise. I would argue that one of the benefits of CB's on the panel is knowing if one has Popped and having the ability to easily reset it. Not sure how having this under the...
Forum: Traditional Aircraft Engines 11-18-2022, 11:56 AM
Replies: 4
Views: 472
Posted By lr172
I'd focus on the pressure issues first. I...

I'd focus on the pressure issues first. I responded to that post. Shutter in front of cooler works better than behind. I only get 155-160 in the winter (no shutter). Engine hasn't rusted or blown...
Forum: Traditional Aircraft Engines 11-18-2022, 11:31 AM
Replies: 9
Views: 727
Posted By lr172
The pump is designed to deliver quite a bit more...

The pump is designed to deliver quite a bit more volume than that oil system can take and the regulator just bleeds excess volume to keep pressure below a maximum and that max is viscosity dependant....
Forum: Glass Cockpit 11-18-2022, 09:50 AM
Replies: 6
Views: 1,330
Posted By lr172
This was my understanding and fairly certain that...

This was my understanding and fairly certain that the tail number does not have to be programmed into the unit, though it may be possible that it can be.
Forum: RV-7/7A 11-18-2022, 09:33 AM
Replies: 11
Views: 2,736
Posted By lr172
Probably a failed sender. It is just a pot with...

Probably a failed sender. It is just a pot with a wiper going over a carbon trace and can intermittently fail open, which would explain some of your symptoms Best to put an ohmmeter on the sender...
Forum: RV Building Tips/Techniques 11-18-2022, 09:26 AM
Replies: 12
Views: 1,296
Posted By lr172
I would check the data sheet to see if vertical...

I would check the data sheet to see if vertical orientation is allowed. Pretty sure it states which end should be mounted up and suspect it is not recommended. Diodes do not protect the coil. They...
Forum: Electrical Systems 11-18-2022, 08:24 AM
Replies: 33
Views: 2,100
Posted By lr172
While I would agree that Volts are the best...

While I would agree that Volts are the best primary indication of charging health, I would argue that the are benefits to indicating current draw as well and makes a good secondary indication. Less...
Forum: RV Building Tips/Techniques 11-17-2022, 02:31 PM
Replies: 6
Views: 495
Posted By lr172
If it is like a shaking jar of nails, there is a...

If it is like a shaking jar of nails, there is a good chance that a prop balance job will make you happy. I don't get that feeling in my 6A and don't believe it is typical.
Forum: Glass Cockpit 11-17-2022, 02:24 PM
Replies: 1
Views: 239
Posted By lr172
No dynon, but Garmin and GRT. I still use an...

No dynon, but Garmin and GRT. I still use an ipad with FF. I think it is easier to use for weather, airport info, ifr plates and big picture mapping. I leave the EFIS in track up and FF in north...
Forum: RV-7/7A 11-17-2022, 12:14 PM
Replies: 6
Views: 290
Posted By lr172
Holes in the top skin are the guide, not the...

Holes in the top skin are the guide, not the firewall tabs. Use the top skin to drill the first two holes in the hinge, as the sets up the alignment. Do this while the skin is held firmly in place...
Forum: RV Building Tips/Techniques 11-17-2022, 09:15 AM
Replies: 6
Views: 495
Posted By lr172
Money better spent on having someone balance your...

Money better spent on having someone balance your prop.

Larry
Forum: GPS 11-17-2022, 08:57 AM
Replies: 6
Views: 423
Posted By lr172
This wouldn't be the first time that a phone...

This wouldn't be the first time that a phone representative at a company didn't fully understand their own products.

Suggest you keep calling until a knowledgeable person answers or maybe try email....
Forum: RV-10 11-16-2022, 09:46 AM
Replies: 7
Views: 595
Posted By lr172
Depends how you fly in cruise. If you are WOT...

Depends how you fly in cruise. If you are WOT and Rich, then yes a power boost and speed increase. If, like most of us, you run lean of peak EGT, the CAI will not produce any more power than a...
Forum: Traditional Aircraft Engines 11-16-2022, 09:08 AM
Replies: 11
Views: 1,246
Posted By lr172
I would speculate that without specialized tools,...

I would speculate that without specialized tools, the only real way to determine gear tooth wear in the field is to measure backlash in the gear train. Be advised that tooth wear is often not evenly...
Forum: RV-3 11-16-2022, 08:33 AM
Replies: 57
Views: 2,691
Posted By lr172
Great comparison data. Same plane, same prop. ...

Great comparison data. Same plane, same prop. With this comparison data, engine issues are somewhat irrelevant as similar RPM's should net similar TAS's. This guy is getting 165 Knots at 2550 and...
Forum: Electrical Systems 11-15-2022, 12:56 PM
Replies: 42
Views: 2,521
Posted By lr172
Ok, fair point. I get it. Is this an issue with...

Ok, fair point. I get it. Is this an issue with Lycomings? I have never heard about it before. On two overhauls, they seemed to self prime and produce decent pressure in about 10 seconds at...
Forum: Electrical Systems 11-15-2022, 12:47 PM
Replies: 42
Views: 2,521
Posted By lr172
Please see Galin's post on the previous page and...

Please see Galin's post on the previous page and please re-assess your opinion. That was from a brown out, which is far more likely than a voltage spike during start up. Not sure why an avionics...
Forum: Electrical Systems 11-15-2022, 12:40 PM
Replies: 42
Views: 2,521
Posted By lr172
Ok, so what would be done differently if you had...

Ok, so what would be done differently if you had an OP gauge indicating 0 just after start up in this case? I am guessing you just sit there and wait for the pressure to come back. Struggling to...
Forum: RV-3 11-15-2022, 12:35 PM
Replies: 57
Views: 2,691
Posted By lr172
i added via edits, so please read again.

i added via edits, so please read again.
Forum: RV-3 11-15-2022, 12:08 PM
Replies: 57
Views: 2,691
Posted By lr172
Assuming this wing is like the 4/6/8 wings, which...

Assuming this wing is like the 4/6/8 wings, which I believe it is, pull the wing tip. You will find two 3/16 or 1/4" tooling holes in the center area of the outer wing rib. Align a straight edge...
Forum: RV-3 11-15-2022, 10:28 AM
Replies: 57
Views: 2,691
Posted By lr172
Thanks, I didn't understand what the Speed demon...

Thanks, I didn't understand what the Speed demon data was. So, speeds truly are low, so not an indication issue though he didn't share what RPM produced that data. That leaves drag. He has pretty...
Forum: RV General Discussion/News 11-15-2022, 10:03 AM
Replies: 4
Views: 547
Posted By lr172
Inside surfaces? Gas comes from oil and over a...

Inside surfaces? Gas comes from oil and over a long period of time an oil type residue remains from the constant exposure to the gas. Will need something quite a bit stronger than mineral spirits. ...
Forum: Traditional Aircraft Engines 11-15-2022, 09:26 AM
Replies: 5
Views: 733
Posted By lr172
Just to help others, there are two styles of Lyc...

Just to help others, there are two styles of Lyc case through bolts. The older ones (mostly narrow deck) and the type Mconner is discussing have the through STUDS threaded into the left side of the...
Forum: Electrical Systems 11-15-2022, 08:52 AM
Replies: 42
Views: 2,521
Posted By lr172
While there is a lot of that in aviation, forcing...

While there is a lot of that in aviation, forcing us to hang on to stuff we shouldn't, but a lot of it is acquired knowledge that shouldn't be forgotten. I forget who said it: "If you forgot...
Forum: Electrical Systems 11-15-2022, 08:50 AM
Replies: 42
Views: 2,521
Posted By lr172
And there you go, point made.

And there you go, point made.
Forum: Electrical Systems 11-15-2022, 08:38 AM
Replies: 42
Views: 2,521
Posted By lr172
I would argue that as long as the engine was...

I would argue that as long as the engine was making good oil pressure at shut down, there is about a 0% chance it won't make pressure at the next start up. Nothing in that system can really fail...
Forum: RV-3 11-15-2022, 08:25 AM
Replies: 57
Views: 2,691
Posted By lr172
IMHO, external rust has no bearing on engine...

IMHO, external rust has no bearing on engine performance or even a clue to how it was maintained. My 6 sits on the ramp and has visible corrosion in areas around the cylinder. Borescope shows...
Forum: RV-3 11-15-2022, 08:14 AM
Replies: 57
Views: 2,691
Posted By lr172
Most phones have GPS. Download a little GPS...

Most phones have GPS. Download a little GPS speed display app for you phone. The go up and fly four cardinal points at a constant IAS and altitude. Then record TAS and GPS speed after stabilized...
Forum: RV-3 11-15-2022, 08:00 AM
Replies: 57
Views: 2,691
Posted By lr172
I was up yesterday in the 6 and slowed down to...

I was up yesterday in the 6 and slowed down to get some #s for you. At 3000' I was doing 132 KTAS at 2250 RPM. You have a coarser prop and less front plate drag, so in theory should be getting...
Forum: Alternative Engines 11-14-2022, 12:09 PM
Replies: 48
Views: 5,281
Posted By lr172
I hate to step into something I know nothing...

I hate to step into something I know nothing about. However, when I look at that frame structure with the leverage afforded by those long rods, all located on just one side, and compare it to all...
Forum: RV-3 11-14-2022, 11:30 AM
Replies: 57
Views: 2,691
Posted By lr172
Something is way out of whack. At 3000', my 6A...

Something is way out of whack. At 3000', my 6A (should be at least 5 kts slower) will get 160 kts at around 8.7 GPH or so. 160 kts @ 8 GPH at 8000' Your 150 vs my 160 should still net an advantage...
Forum: RV Ongoing Maintenance Issues 11-14-2022, 10:51 AM
Replies: 4
Views: 792
Posted By lr172
inspection at the wheels and fairings doesn't...

inspection at the wheels and fairings doesn't make any sense to me. I would be looking at the main gear weldments and what they attach to, as well as the nose gear assembly, engine mount and the...
Forum: RV-3 11-14-2022, 10:24 AM
Replies: 57
Views: 2,691
Posted By lr172
Do you have a fuel flow gauge? Checking fuel...

Do you have a fuel flow gauge? Checking fuel flow will be a method of ensuring that carb is not somehow restricting fuel or air to the engine.

Larry
Forum: RV-14 11-14-2022, 10:07 AM
Replies: 50
Views: 15,584
Posted By lr172
I would argue it is not really about need. Find...

I would argue it is not really about need. Find me a maker of reciprocating gas engines today that recommends anything other than multi-vis oil. Lawn mower engines excluded. Many benefits to be...
Forum: Propellers 11-14-2022, 09:49 AM
Replies: 11
Views: 364
Posted By lr172
Yes, those prop spacers are fine and the 2.25"...

Yes, those prop spacers are fine and the 2.25" version has reasonably sized bolts, however, I would not want to use a 10" long bolt in that application. Not an ME, so no data to back that up. Just...
Forum: RV-14 11-14-2022, 09:26 AM
Replies: 69
Views: 9,619
Posted By lr172
Generally a valve will stick open. If it sticks...

Generally a valve will stick open. If it sticks closed, the pushrod bends and it never fully opens again. If an exhaust valve sticks fully or partially open, CHTs and EGTs will drop. Magnitude of...
Forum: RV Ongoing Maintenance Issues 11-14-2022, 09:21 AM
Replies: 2
Views: 434
Posted By lr172
Can't help with those numbers, but I doubt that...

Can't help with those numbers, but I doubt that Vans ever shipped teflon hoses. I thought they only supply rubber. Not sure, so don't trust that.

Do a bit of searching on hose size. A teflon hose...
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