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Search: Posts Made By: lr172
Forum: RV-10 Today, 12:17 PM
Replies: 23
Views: 1,407
Posted By lr172
+1 Direct sales, distributorships or marketing -...

+1

Direct sales, distributorships or marketing - Pick at least one. Word of mouth and a website may work for the minority and very niche markets, like RV's, but is a MAJOR risk factor for a small...
Forum: Traditional Aircraft Engines Today, 07:26 AM
Replies: 4
Views: 136
Posted By lr172
Your first chart shows erratic OT readings long...

Your first chart shows erratic OT readings long before you pulled the power back. Up and down oil temps is likely a sensor issue NOT a VT issue. It is a simple thermistor that changes resistance...
Forum: Traditional Aircraft Engines Today, 07:09 AM
Replies: 4
Views: 136
Posted By lr172
Yes. oil temp can't rise 35* in 30 seconds and...

Yes. oil temp can't rise 35* in 30 seconds and vernatherms don't really fail like this. Likely a bad crimp at terminal on OT sensor. vibration patterns are changing as you pull the power back and...
Forum: Glass Cockpit Yesterday, 07:30 AM
Replies: 12
Views: 351
Posted By lr172
Do you get any of the other alerts from the G3X,...

Do you get any of the other alerts from the G3X, such as AOA tones, EMS warnings, etc.? If not and the wiring wasn't touched, I would be asking Garmin about a potential problem with the PFD. The...
Forum: Traditional Aircraft Engines 07-01-2022, 12:58 PM
Replies: 23
Views: 2,482
Posted By lr172
I see gouging marks all the way around. Granted,...

I see gouging marks all the way around. Granted, they are MUCH smaller on one side, but definately there. You can even see pock marks in the flat areas. Pretty easy to put a machinist square in...
Forum: RV Ongoing Maintenance Issues 07-01-2022, 10:57 AM
Replies: 8
Views: 334
Posted By lr172
Unless you can confirm where it is leaking from,...

Unless you can confirm where it is leaking from, you could have a crack somewhere creating a compromised tube/flare. If that is the case, masking with a sealing device potentially sets you up for a...
Forum: Fuel Injection Systems 07-01-2022, 06:57 AM
Replies: 16
Views: 1,389
Posted By lr172
Try Rock Auto. Cheaper than amazon, but the same...

Try Rock Auto. Cheaper than amazon, but the same when shipping is added.
Forum: Traditional Aircraft Engines 06-30-2022, 12:53 PM
Replies: 23
Views: 2,482
Posted By lr172
And what is interesting is it does not look like...

And what is interesting is it does not look like misalignment that is causing the damage, though it does appear to be misaligned. If that were the case. the wear surfaces would be relatively flat...
Forum: Traditional Aircraft Engines 06-30-2022, 07:26 AM
Replies: 23
Views: 2,482
Posted By lr172
Ouch! What does the crank surface look like that...

Ouch! What does the crank surface look like that is touching those thrust surfaces on the case? Have you figured out what is causing that gouging? Odd that you are getting damage on both the fore...
Forum: RV-4 06-30-2022, 07:09 AM
Replies: 3
Views: 303
Posted By lr172
IMHO, a dipstick with actual qty markings should...

IMHO, a dipstick with actual qty markings should show sump volume, not system volume. What is in the rest of the system is not relevant when checking a sump, as it's purpose is to know the reserve...
Forum: RV-12/RV-12iS 06-30-2022, 06:49 AM
Replies: 11
Views: 972
Posted By lr172
If both you and the tower are picking up static...

If both you and the tower are picking up static when you are not transmitting, that eliminates most of the classic stuff as it is not your system picking up errant noise (ground, LED, etc) and just...
Forum: RV Building Tips/Techniques 06-30-2022, 06:34 AM
Replies: 16
Views: 1,046
Posted By lr172
I used a hose clamp for the lower portion of the...

I used a hose clamp for the lower portion of the NG leg fairing and it works very well. I put wood dampers on the MG legs and did not use any clamps, they just ride free. No issues here, BUT the...
Forum: RV General Discussion/News 06-29-2022, 02:09 PM
Replies: 17
Views: 690
Posted By lr172
It was also downstream of the pumps when it was a...

It was also downstream of the pumps when it was a carb'ed as well and was also rock solid. The recommendation is that the cubes are downstream from the pumps. No recommendation that it is...
Forum: Traditional Aircraft Engines 06-29-2022, 08:21 AM
Replies: 23
Views: 2,482
Posted By lr172
If the shavings are curled, that means large...

If the shavings are curled, that means large pieces. Split the case and look at the thrust surface. If it is making curled shavings any wear should be visible to the naked eye. You also need to...
Forum: Traditional Aircraft Engines 06-29-2022, 08:14 AM
Replies: 23
Views: 2,482
Posted By lr172
Yes, the fwd end of the crank is rubbing against...

Yes, the fwd end of the crank is rubbing against the case. This is normal and the engineered behavior. The question then is it just rubbing or making metal. Without a microscope, they can look the...
Forum: Traditional Aircraft Engines 06-29-2022, 07:56 AM
Replies: 1
Views: 165
Posted By lr172
The difference is $1.72. Seriously, it is a lock...

The difference is $1.72. Seriously, it is a lock washer. Not a lot special going on there. I just use hardware store star washers. I would trust the ACS stuff if you feel the need for aviation...
Forum: Traditional Aircraft Engines 06-29-2022, 07:34 AM
Replies: 23
Views: 2,482
Posted By lr172
The crank is supposed to rub against the case in...

The crank is supposed to rub against the case in that area. It is what prevents the crankshaft from pulling out of the case. Every engine has thrust surfaces to deal with axial movement of the...
Forum: Traditional Aircraft Engines 06-29-2022, 07:18 AM
Replies: 23
Views: 2,482
Posted By lr172
I would not immediately jump to that area as the...

I would not immediately jump to that area as the source of metal. The fwd face of the #1 journal rides against the case and acts as a thrust surface in tractor configurations. It would be really...
Forum: RV-6/6A 06-29-2022, 06:55 AM
Replies: 3
Views: 271
Posted By lr172
+1 The lyc design is a bit poor as the oil goes...

+1

The lyc design is a bit poor as the oil goes to the cooler before the filter/screen. The passages in the cooler are very small and can get blocked with debris. Flushing it with a pro like...
Forum: Traditional Aircraft Engines 06-29-2022, 06:44 AM
Replies: 4
Views: 256
Posted By lr172
Peak EGT must be done by observing manually and...

Peak EGT must be done by observing manually and slowly at that. You can't count on the EMS to accurately observe a true peak, especially if moving too quickly and using .2 GPH increments. When you...
Forum: Propellers 06-29-2022, 06:29 AM
Replies: 5
Views: 344
Posted By lr172
Are you sure about that? When I was shapping the...

Are you sure about that? When I was shapping the spinner backplate block off plates, I used two 1x2 boards clamped on to the blade and pulled them into the coarse position. It is just a spring...
Forum: Traditional Aircraft Engines 06-28-2022, 12:45 PM
Replies: 11
Views: 727
Posted By lr172
You sound far more knowledgeable than I, so will...

You sound far more knowledgeable than I, so will defer to your expertise. I was always instructed that oil and water DO NOT mix and have seen it proven several times. However, that is not a lab or...
Forum: Traditional Aircraft Engines 06-28-2022, 10:38 AM
Replies: 11
Views: 727
Posted By lr172
Oil is NOT hygroscopic, like glycol. It will not...

Oil is NOT hygroscopic, like glycol. It will not absorb water, though it can hold very small water particles in suspension for moderate periods of time due to it's strong surface tension. ...
Forum: Traditional Aircraft Engines 06-28-2022, 10:25 AM
Replies: 18
Views: 4,020
Posted By lr172
This is what I would do. Should be able to...

This is what I would do. Should be able to compare both readings on the ground. With intermittent problems, you need a direct comparison to determine health of elec sender. Turning it off then on...
Forum: Traditional Aircraft Engines 06-28-2022, 10:22 AM
Replies: 18
Views: 4,020
Posted By lr172
1/8" NPT in the accy case. The std Vans sensor...

1/8" NPT in the accy case. The std Vans sensor mounting block the same.
Forum: RV General Discussion/News 06-28-2022, 08:30 AM
Replies: 17
Views: 690
Posted By lr172
From my research, the mechanical fuel pumps do...

From my research, the mechanical fuel pumps do not produce pulsing on the pressure side, BUT DO produce pulsing on the suction side. Input check valve is open on the pump upstroke and closed on the...
Forum: Traditional Aircraft Engines 06-28-2022, 08:18 AM
Replies: 13
Views: 1,146
Posted By lr172
Excess ignition advance will cause CHTs to rise...

Excess ignition advance will cause CHTs to rise and EGTs to fall. If #1 CHTs are similar and EGT is climbing 150-200* above normal, I would be looking at retarded timing, not advanced. When one...
Forum: RV General Discussion/News 06-28-2022, 07:41 AM
Replies: 17
Views: 690
Posted By lr172
The float doesn't work that way. It does not...

The float doesn't work that way. It does not really start and stop flow and will definitely NOT cause fuel flow to wander, especially at higher flow rates. Having the sensor upstream of the pump...
Forum: Traditional Aircraft Engines 06-27-2022, 07:18 AM
Replies: 17
Views: 1,851
Posted By lr172
Intermittent, very short duration (sub-second)...

Intermittent, very short duration (sub-second) misses are often ignition related, though can be very small fuel disruptions with fuel injection, but not carbs. Classic symptoms for sticking valves...
Forum: Traditional Aircraft Engines 06-27-2022, 07:07 AM
Replies: 6
Views: 459
Posted By lr172
You want the Ashless Dispersent additives to keep...

You want the Ashless Dispersent additives to keep the debris in suspension and that is not included in "straight mineral oil," nor either the Lyc additive nor the camgaurd. If you use this oil, any...
Forum: Traditional Aircraft Engines 06-27-2022, 06:42 AM
Replies: 13
Views: 1,146
Posted By lr172
low compression should reduce CHTs, not increase...

low compression should reduce CHTs, not increase them relative to cyl's with higher compression.

While #3 can be a challenge to cool without some mod's, it is not typical to see 100+ spreads between...
Forum: Fuel Injection Systems 06-27-2022, 05:53 AM
Replies: 2
Views: 182
Posted By lr172
I would bet that airflow performance sells them. ...

I would bet that airflow performance sells them. Good people.
Forum: RV-10 06-26-2022, 11:32 AM
Replies: 10
Views: 814
Posted By lr172
That is almost a 20% increase in size over the...

That is almost a 20% increase in size over the .028 that Don recommends for the 540. I think you meant .0005"

OP listed climb temps and we can probably assume he is 200-250 ROP in that regime. ...
Forum: RV-10 06-25-2022, 12:31 PM
Replies: 10
Views: 814
Posted By lr172
I would experiment. The whole purpose of the...

I would experiment. The whole purpose of the **** is to move cooling air from the front cylinder to the middle / rear cylinder. #4 is pretty cool, so could **** up that area a bit as well. My 3/4...
Forum: RV-6/6A 06-25-2022, 07:29 AM
Replies: 7
Views: 399
Posted By lr172
That gear leg is over an inch in diameter. No...

That gear leg is over an inch in diameter. No mater what you do, the larger drill bit will go straight through the hole in the leg, which is what they are designed to do. It will NOT drill at a new...
Forum: Traditional Aircraft Engines 06-25-2022, 07:10 AM
Replies: 8
Views: 403
Posted By lr172
That is the casted boss for CHT sensor. In the...

That is the casted boss for CHT sensor. In the old days, they made different cylinders for different engines and if that engine didn't specify the sensor they either didn't cast in the boss or drill...
Forum: RV General Discussion/News 06-25-2022, 07:02 AM
Replies: 18
Views: 2,068
Posted By lr172
I have lifted the plane many times via both the...

I have lifted the plane many times via both the engine and the engine mount without the engine attached. Lift via the mount and put a saw horse under the rear fuse area. Only a few pounds back...
Forum: RV General Discussion/News 06-25-2022, 06:53 AM
Replies: 18
Views: 2,068
Posted By lr172
You are in for a big project, as there about 80...

You are in for a big project, as there about 80 bolts that need to come out and possibly a good bit of wiring that will need to be tagged and cut. You need to support the fuse, but not via the gear...
Forum: RV-7/7A 06-25-2022, 06:45 AM
Replies: 19
Views: 1,074
Posted By lr172
when I do wheel maintenance I put a 2x4 under the...

when I do wheel maintenance I put a 2x4 under the fuse skin directly under the spar, then one of those long HF jacks under that. Two jacks should lift the whole fuse, but you'll need to support the...
Forum: Painting your RV 06-24-2022, 06:45 AM
Replies: 13
Views: 597
Posted By lr172
It must have been some mental transfer when I...

It must have been some mental transfer when I drove through Estes Park a couple years ago. My son got married at the YMCA in the park there. He lives in Denver.

Larry
Forum: Interiors 06-24-2022, 06:24 AM
Replies: 7
Views: 549
Posted By lr172
If you don't find either the letter C inside a...

If you don't find either the letter C inside a circle or the words "copyright" it is NOT protected work. US trademark law requires markings on all copyrighted work. Just because someone created...
Forum: Traditional Aircraft Engines 06-24-2022, 06:19 AM
Replies: 2
Views: 278
Posted By lr172
They have been using two clamps per line for...

They have been using two clamps per line for quite some time, so the SB is just to insure two are there. Only double if your engine only has 1 per line, as was the standard some time ago.

Larry
Forum: Electrical Systems 06-24-2022, 06:00 AM
Replies: 2
Views: 434
Posted By lr172
On the 10, I used connectors for everything on...

On the 10, I used connectors for everything on the removeable panel so it could come out easy. However, I only used lengthy loops on the MFD's and G5. Once those are out, you can get your hands in...
Forum: Painting your RV 06-23-2022, 10:52 AM
Replies: 13
Views: 597
Posted By lr172
ALWAYS clean before scuffing, else you just push...

ALWAYS clean before scuffing, else you just push the debris deeper into the paint. Cleaning will be a bit tougher than normal, as the rattle can enamel will come off with the stronger solvents. I...
Forum: Alternative Engines 06-23-2022, 06:31 AM
Replies: 66
Views: 8,217
Posted By lr172
With the big bore Lyc's, we are getting good fuel...

With the big bore Lyc's, we are getting good fuel economy by running lean. These engines are turning low RPMs, so easy to get very lean. In the 10, I am cruising mostly at 50-75* LOP, which is...
Forum: Autopilots 06-22-2022, 07:50 AM
Replies: 3
Views: 324
Posted By lr172
Greg designed the AP around his 6 and all of the...

Greg designed the AP around his 6 and all of the PID settings at 100 (his version of neutral) are considered baseline for that model. I would start there. The GRT does take some work to dial in and...
Forum: RV Photo/Video URLs 06-21-2022, 10:56 AM
Replies: 9
Views: 734
Posted By lr172
My hanger neighbor does A LOT of air photography....

My hanger neighbor does A LOT of air photography. He just opens the window on the 172:D If you are serious about it, it might make sense to build a small opening in the canopy that can be open and...
Forum: RV General Discussion/News 06-21-2022, 10:47 AM
Replies: 1
Views: 242
Posted By lr172
You can make one. Most of the thermocouples just...

You can make one. Most of the thermocouples just solder the two J or K wires together and to the metal probe. Different approaches for the grounded and non-grounded varieties, I believe. I suspect...
Forum: RV Building Tips/Techniques 06-21-2022, 10:42 AM
Replies: 2
Views: 427
Posted By lr172
I would make or buy a 1" split tube/flange in SS....

I would make or buy a 1" split tube/flange in SS. I cover the tube opening with firesleeve and a SS clamp at the wire exit, which I think is good enough, but some prefer to fill the tube with 2000*...
Forum: Alternative Engines 06-21-2022, 10:36 AM
Replies: 66
Views: 8,217
Posted By lr172
I wouldn't expect you could beat the lyc BSFC...

I wouldn't expect you could beat the lyc BSFC numbers, but in the end, the lower acquisition, parts and overhaul costs will more than offset a few BSFC points.
Forum: Alternative Engines 06-21-2022, 09:22 AM
Replies: 66
Views: 8,217
Posted By lr172
I have never really tracked percentage power at...

I have never really tracked percentage power at cruise. I cruise at 165 KTAS in the 10 (IO-540) at around 10.5 GPH at 8-9K. I believe the power is in the 60% range, maybe less. That would be...
Forum: Alternative Engines 06-21-2022, 06:55 AM
Replies: 66
Views: 8,217
Posted By lr172
200HP out of a 60CI engine is impressive! Do you...

200HP out of a 60CI engine is impressive! Do you know BSFC at 150HP?
Forum: RV General Discussion/News 06-21-2022, 06:37 AM
Replies: 33
Views: 3,040
Posted By lr172
On a nice weekend day, there is usually A LOT of...

On a nice weekend day, there is usually A LOT of traffic under the 3K and 4K rings due west of ORD. Much more traffic than the lake shore route. The problem with the latter is that most everyone is...
Forum: RV General Discussion/News 06-21-2022, 06:23 AM
Replies: 33
Views: 3,040
Posted By lr172
We had a sailboat on the lake so paid attention...

We had a sailboat on the lake so paid attention to the stuff. water temps did not get above 40 untill well into May. Time to loss of consciousness at 40 is around 10 minutes. Don't recall when...
Forum: VAF Classifieds (posts in here deleted after 30 days) 06-21-2022, 06:19 AM
Replies: 7
Views: 570
Posted By lr172
I also have a new in the box AOA pro, so reach...

I also have a new in the box AOA pro, so reach out if you cannot buy the one posted here.

Larry
Forum: Alternative Engines 06-20-2022, 01:08 PM
Replies: 66
Views: 8,217
Posted By lr172
Yes, I inadvertantly combined the concepts. ...

Yes, I inadvertantly combined the concepts. Still relative though. Vno is just the speed at which the 50 FPS vertical gust can create structural damage by exceeding the wings G load rating. Va is...
Forum: Alternative Engines 06-20-2022, 11:26 AM
Replies: 66
Views: 8,217
Posted By lr172
Vno IS related to structural integrity. The...

Vno IS related to structural integrity. The concept is that a vertical gust can create G loading beyond the capacity of the plane. Vno is a limit whereby below it, a 50 FPS vertical gust (FAA...
Forum: Alternative Engines 06-20-2022, 07:46 AM
Replies: 66
Views: 8,217
Posted By lr172
Let's limit the fear mongering and get the facts...

Let's limit the fear mongering and get the facts straight. What is it that you are calling max cruise speed, as that is not a std aviation term? If you are referring to Vno, which is NOT a max...
Forum: RV General Discussion/News 06-20-2022, 06:48 AM
Replies: 33
Views: 3,040
Posted By lr172
I am Chicago based and WILL NOT fly over the...

I am Chicago based and WILL NOT fly over the lake, at least beyond glide range. First, from my reading most low wing fixed gear planes will flip when landing in water. I speculate that they fill...
Forum: RV General Discussion/News 06-18-2022, 10:41 AM
Replies: 15
Views: 1,425
Posted By lr172
I used the left over trailing edge wedge on the...

I used the left over trailing edge wedge on the 10. Just fill the holes with filler, paint and adhere with RTV. It is very small and un noticeable. Need a longer piece, but cant even tell t is...
Forum: Alternative Engines 06-17-2022, 11:36 AM
Replies: 42
Views: 3,846
Posted By lr172
You may be right. I was afraid that the covid...

You may be right. I was afraid that the covid situation just pulled future demand into today, creating the current bulge and fear demand will fall off a cliff once the recession takes hold. Time...
Forum: Alternative Engines 06-17-2022, 10:28 AM
Replies: 42
Views: 3,846
Posted By lr172
I don't think anyone has really analyzed whether...

I don't think anyone has really analyzed whether or not the current exploding experimental market is an anomaly or a trend. If I were lycoming or any other manufacturer, I would think long and hard...
Forum: RV-10 06-17-2022, 07:04 AM
Replies: 4
Views: 590
Posted By lr172
It wouldn't. The 320 has one EI and one mag with...

It wouldn't.

The 320 has one EI and one mag with the EI plugs on top. It doesn't really matter. However, if you run rich a lot and have plug fouling issues, I would put the auto plugs on the...
Forum: RV-10 06-15-2022, 12:20 PM
Replies: 2
Views: 647
Posted By lr172
Sorry, but street sign material in 1" flat stock...

Sorry, but street sign material in 1" flat stock is NOT going to hold the rudder pedals in any real wind. The rudder pedals get a LOT of force in a serious blow as the 10 has a LARGE rudder. I made...
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