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Search: Posts Made By: lr172
Forum: VAF Classifieds (posts in here deleted after 30 days) Yesterday, 08:50 AM
Replies: 2
Views: 142
Posted By lr172
I have a brand new MB antenna that I never...

I have a brand new MB antenna that I never installed. PM me to discuss. Will sell cheap.

Larry
Forum: RV Ongoing Maintenance Issues Yesterday, 08:33 AM
Replies: 24
Views: 2,122
Posted By lr172
It is not a flange interface. It is a socket. ...

It is not a flange interface. It is a socket. Pretty much all of the load is carried by the socket structure. The bolt just keeps the rod from falling out of the socket. This is no different from...
Forum: RV Ongoing Maintenance Issues Yesterday, 08:28 AM
Replies: 24
Views: 2,122
Posted By lr172
Yes, at least in my build manual. I assumed it...

Yes, at least in my build manual. I assumed it was for corrosion reasons, but see how the grease can help to minimize wear in cases where the fit was too loose. Not sure what the tolerances are on...
Forum: Traditional Aircraft Engines Yesterday, 07:53 AM
Replies: 318
Views: 78,156
Posted By lr172
Have done no research, but it is highly likely...

Have done no research, but it is highly likely that superior is still a US corporation, wholly owned by the Chinese parent. That means any lawsuit would be dealt with in a US court. Not saying you...
Forum: Electronic Ignition Systems 12-03-2021, 08:23 AM
Replies: 37
Views: 3,964
Posted By lr172
Once you start shooting fuel in the intake plenum...

Once you start shooting fuel in the intake plenum (i.e. the common area before the runners), you now experience the issues the carb guys do - way too small of a plenum and poor air flow distribution,...
Forum: Electrical Systems 12-03-2021, 08:00 AM
Replies: 12
Views: 365
Posted By lr172
I use voltage reduction on the 6 and it has...

I use voltage reduction on the 6 and it has plenty of power at reduced voltage. Not surprised to hear it doesn't work on the 10 (3-4 times the tab surface area). I just made a little board (1" x...
Forum: Engine Monitors 12-03-2021, 07:49 AM
Replies: 10
Views: 190
Posted By lr172
You can get the restrictors in various sizes at...

You can get the restrictors in various sizes at Mcmaster carr. .020 to .040 seems to be a good range, though I have .004 on my 10 without a meaninfull lag in response time. I have a home made...
Forum: Electrical Systems 12-03-2021, 07:43 AM
Replies: 3
Views: 165
Posted By lr172
Even worse, what if the VPS dies? If you have...

Even worse, what if the VPS dies? If you have something mission critical, might be wise to consider the most reliable path. I have to believe that fuses have the highest MTBF, but suspect breakers...
Forum: RV-4 12-02-2021, 09:41 AM
Replies: 7
Views: 462
Posted By lr172
With the straight edge in place and the aileron...

With the straight edge in place and the aileron skin parallel to the straight edge, you are measuring the gap between the full, top skin and the straight edge. NOt looking at trailing edge, but the...
Forum: Glass Cockpit 12-02-2021, 09:31 AM
Replies: 9
Views: 645
Posted By lr172
I imagine it's too late for this comment, but if...

I imagine it's too late for this comment, but if you plan this as a backup for IFR flight you may find it to be too low to use effectively. I would not want to be shooting an approach with low...
Forum: RV-10 12-02-2021, 09:11 AM
Replies: 9
Views: 336
Posted By lr172
I did not have access hole for these. Just left...

I did not have access hole for these. Just left an extra foot or two of cable. The cable comes out with the antenna from the belly and you can crimp on new ends or can easilly use the old to fish...
Forum: RV-4 12-01-2021, 12:16 PM
Replies: 7
Views: 462
Posted By lr172
I keep adjusting them until they reach the point...

I keep adjusting them until they reach the point that I want them while in flight. Not sure there is a standard that can be applied on the ground.
Forum: RV-4 12-01-2021, 12:09 PM
Replies: 7
Views: 462
Posted By lr172
There can be variation in where the edge of the...

There can be variation in where the edge of the top skin ends. Best to lay a straight edge from the main spar all the way back and press down to force it against the rear spar if the skin is curling...
Forum: Electrical Systems 12-01-2021, 11:55 AM
Replies: 17
Views: 749
Posted By lr172
I had good luck with the anchor brand cigar...

I had good luck with the anchor brand cigar lighter style. Also good luck with the blue sea direct wired port.
Forum: Traditional Aircraft Engines 12-01-2021, 11:51 AM
Replies: 36
Views: 3,015
Posted By lr172
Can't address that; not enough info. It is...

Can't address that; not enough info. It is opposite of what is expected. I only identified that it was a timing mismatch. EI's are usually more advanced than mags and will show a larger drop when...
Forum: Traditional Aircraft Engines 12-01-2021, 11:40 AM
Replies: 36
Views: 3,015
Posted By lr172
No. If you have a plug not firing, That cylinder...

No. If you have a plug not firing, That cylinder will simply not have combustion on one of the ignition sides; Pretty tough to not notice a 4 cyl engine running on 3 cylinders; They get pretty...
Forum: Traditional Aircraft Engines 12-01-2021, 08:57 AM
Replies: 36
Views: 3,015
Posted By lr172
First, the 125 limit is based upon two mags with...

First, the 125 limit is based upon two mags with fixed timing. RPM drop on mag testing is all about advance, not spark strength. With two plugs firing at 25* BTDC will provide more power and RPM...
Forum: Electronic Ignition Systems 12-01-2021, 08:10 AM
Replies: 37
Views: 3,964
Posted By lr172
The divider has a V shaped slot cut into a...

The divider has a V shaped slot cut into a cylinder for each injector line. There is a disc that rides up and down the inside bore (movement actuated by fuel pressure which is somewhat linear with...
Forum: Electronic Ignition Systems 11-30-2021, 12:14 PM
Replies: 10
Views: 484
Posted By lr172
While many do, I don't believe it is required. ...

While many do, I don't believe it is required. An auto plug will go 30K miles (~1000 hours) in a car easy. Fancy alloys will go 100K. I have run them for over 400 hours in my 320 and they still...
Forum: RV-10 11-30-2021, 11:58 AM
Replies: 26
Views: 1,483
Posted By lr172
If you ever plan to let someone else fly your...

If you ever plan to let someone else fly your plane, I strongly suggest a traditional throttle cable. If I need power in the flare, I need it now. Not a good time to be reminded that you must push...
Forum: Electronic Ignition Systems 11-30-2021, 08:57 AM
Replies: 10
Views: 484
Posted By lr172
Plug gap dictates spark energy. Aviation plugs...

Plug gap dictates spark energy. Aviation plugs are made for mags and the gap is small to accomodate the weak coil in the mag. I assume (don't know for sure) that the surefly has a bigger coil and...
Forum: RV-10 11-29-2021, 12:02 PM
Replies: 26
Views: 1,483
Posted By lr172
Not really relevant. Ever seen a fighter or...

Not really relevant. Ever seen a fighter or airliner with a piston engine and constant speed prop? Assuming you mean more modern stuff from the last 60 years, of course.
Forum: RV-8/8A 11-29-2021, 11:56 AM
Replies: 14
Views: 669
Posted By lr172
Not sure this is universal. The cables on my 6...

Not sure this is universal. The cables on my 6 have 800+ hours and perform as well as new. I needed to clean up the plastic friction lock piece on the throttle, but otherwise good as new.

Larry
Forum: RV-10 11-29-2021, 10:01 AM
Replies: 26
Views: 1,483
Posted By lr172
I have flown a bit with quadrants, but much...

I have flown a bit with quadrants, but much prefer the push pull. I am always tinkering with mixture to achieve efficiency and suspect that it is much easier to make precise adjustments with a...
Forum: Safety 11-29-2021, 09:29 AM
Replies: 26
Views: 3,435
Posted By lr172
I have done a fair amount of research on this...

I have done a fair amount of research on this subject and the general wisdom in the welding community is that when TIG or gas welding of 4130 at thicknesses less than 1/8", normalizing is not...
Forum: Traditional Aircraft Engines 11-29-2021, 08:57 AM
Replies: 13
Views: 596
Posted By lr172
From your description, the ambient temps seem...

From your description, the ambient temps seem coincidental. Likely the reduced oil pressure is coming from some other source/problems. Pressure relief is a good place to start and verifying the...
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-29-2021, 08:12 AM
Replies: 7
Views: 476
Posted By lr172
You can make one. The connector is available...

You can make one. The connector is available from Digikey for a couple of bucks. I bought one on this site and the connector was corroded. Not too difficult to make. There is a post here that...
Forum: RV Building Tips/Techniques 11-29-2021, 08:07 AM
Replies: 27
Views: 3,425
Posted By lr172
Section 5 has descriptions and pictures. It will...

Section 5 has descriptions and pictures. It will guide you through the process. My 6 was somewhat sensitive in pitch but not a problem. When I started IFR training, It was hard to hold 100' when...
Forum: RV-6/6A 11-28-2021, 09:41 AM
Replies: 11
Views: 708
Posted By lr172
You may not have noticed yet, but the plane...

You may not have noticed yet, but the plane should have three different hinge half's for mounting the seat back. You may want to pull the cushions and experiment with these. You can also take them...
Forum: Traditional Aircraft Engines 11-28-2021, 09:28 AM
Replies: 6
Views: 428
Posted By lr172
certainly. But I struggle to see how the same...

certainly. But I struggle to see how the same carb is used on both a 360 and a 540. That's a pretty big spread in displacement and suspect the variability across sub-models must be...
Forum: RV-6/6A 11-28-2021, 09:21 AM
Replies: 11
Views: 708
Posted By lr172
Pretty sure the seat position is the same. The 7...

Pretty sure the seat position is the same. The 7 used different, shorter ribs under the seat that lower the seat pan relative to the 6. Without cutting and grafting, the only option would be to rip...
Forum: RV General Discussion/News 11-28-2021, 08:48 AM
Replies: 15
Views: 1,682
Posted By lr172
Some rings (Superior, for example) do not come...

Some rings (Superior, for example) do not come sized to fit. They are manufactred to at least the largest possible diameter and must be filled to a specific end gap at a specific place in the cyl...
Forum: RV General Discussion/News 11-28-2021, 08:30 AM
Replies: 62
Views: 4,763
Posted By lr172
I worry most about differential expansion rates...

I worry most about differential expansion rates of piston and cylinder and the scuffing it can cause, so I set a min CHT of 250F for T/O. If the engine was warm to begin with, I wouldn't worry. I...
Forum: RV-8/8A 11-28-2021, 08:02 AM
Replies: 11
Views: 584
Posted By lr172
I would try some troubleshooting first. I just...

I would try some troubleshooting first. I just had my 39 fail. Garmin clipped me $400 for a refurb, as mine was out of warranty.

Larry
Forum: RV General Discussion/News 11-28-2021, 07:46 AM
Replies: 15
Views: 1,682
Posted By lr172
I had a broken compression ring in my 540. ...

I had a broken compression ring in my 540. Completely unnoticeable and only found with a compression test. No detectable performance increase after replacement. Blowby was a bit higher than...
Forum: Traditional Aircraft Engines 11-27-2021, 09:18 AM
Replies: 6
Views: 428
Posted By lr172
Thanks. I only have a 320 and a 540 and assumed...

Thanks. I only have a 320 and a 540 and assumed the 320/360 were the same.
Forum: RV-6/6A 11-27-2021, 09:12 AM
Replies: 5
Views: 465
Posted By lr172
Just pull the pedals out and take them to a local...

Just pull the pedals out and take them to a local welder. Let him know it is 4130 steel and show him a picture of the gusset from the SB. You could buy the 4130 from Mcmaster and make the gusset...
Forum: Traditional Aircraft Engines 11-27-2021, 08:54 AM
Replies: 6
Views: 428
Posted By lr172
Lot of hot rodders use large carbs to deal with...

Lot of hot rodders use large carbs to deal with issues like turbos and other enhancements that increase the intake CFM. From my experience, a carb that flows a lot more then the typical displacement...
Forum: Traditional Aircraft Engines 11-27-2021, 08:38 AM
Replies: 36
Views: 3,015
Posted By lr172
From my read of your data, FP is pretty normal...

From my read of your data, FP is pretty normal all the way until you drop from idle to shut off. As mentioned, the raw fuel in the air box can be from factors other then the one that caused the un...
Forum: RV-9/9A 11-27-2021, 08:21 AM
Replies: 47
Views: 3,098
Posted By lr172
I learned by slipping down final. However, my 6A...

I learned by slipping down final. However, my 6A transition CFI recommended trying the crab approach. I settled on a hybrid. I crab down final and put in a slip as I come over the numbers. I find...
Forum: RV General Discussion/News 11-26-2021, 11:50 AM
Replies: 62
Views: 4,763
Posted By lr172
I don't agree with that. Watching EGT's is...

I don't agree with that. Watching EGT's is important for monitoring engine health. for example, the quickest way to identify a mag or EI failure is to observe a 100-150* rise in EGT. How would you...
Forum: Electrical Systems 11-26-2021, 09:45 AM
Replies: 11
Views: 777
Posted By lr172
If wired according to the above diagram, the...

If wired according to the above diagram, the switch will only allow the left mag to fire with the key in the S position. It is critical that you use the specific grd posts shown.
Forum: RV-6/6A 11-26-2021, 09:34 AM
Replies: 5
Views: 465
Posted By lr172
FYI, the lines that go between the co pilot and...

FYI, the lines that go between the co pilot and pilot brakes are HIGH pressure, not LOW (at least when the co pilot is braking). Be sure to use the stronger parker lines and not nylon for...
Forum: Electrical Systems 11-25-2021, 08:22 AM
Replies: 4
Views: 800
Posted By lr172
The P lead post is actually the end of a...

The P lead post is actually the end of a capicator and it is wired in parallel with the coil's primary winding output on one side of the points (the other side is ground). That post should show 0...
Forum: RV General Discussion/News 11-24-2021, 08:16 AM
Replies: 62
Views: 4,763
Posted By lr172
I believe there are many variables that impact...

I believe there are many variables that impact build up on the exhaust valves. In fact, there is still argument about what the build up is (I still believe it is carbon from oxidized oil, others...
Forum: RV General Discussion/News 11-24-2021, 08:01 AM
Replies: 13
Views: 1,321
Posted By lr172
It definitely appeared as a wave, as you can see,...

It definitely appeared as a wave, as you can see, via the cloud tops, the intensity diminish and amplitude lengthen over a distance; Mountain wave does the same, but normally can't be seen, just...
Forum: RV General Discussion/News 11-23-2021, 10:14 AM
Replies: 13
Views: 1,321
Posted By lr172
I am guessing you were east of a 4-5000'...

I am guessing you were east of a 4-5000' mountain? Could be as much as 100's of miles east. Pretty sure they are simple cumulus, but the upper shape is created by mountain wave. When seen near the...
Forum: RV-9/9A 11-23-2021, 09:54 AM
Replies: 47
Views: 3,098
Posted By lr172
Still not sure I agree. I believe that a spin...

Still not sure I agree. I believe that a spin requires yawing at the stall. In a skid, there is definitely yaw in the direction of turn/bank. In a slip, there is no yaw unless you over do the...
Forum: RV Ongoing Maintenance Issues 11-23-2021, 09:15 AM
Replies: 4
Views: 353
Posted By lr172
I have experienced drooping in the area of 3/16,...

I have experienced drooping in the area of 3/16, maybe 1/4" over time and use. The amount of droop seems to vary a bit, but I would never expect an engine to droop 3/4". The fact that new mounts...
Forum: RV-9/9A 11-23-2021, 08:31 AM
Replies: 47
Views: 3,098
Posted By lr172
I thought that a skid was pro spin and will...

I thought that a skid was pro spin and will immediately spin at the stall (bank and yaw moment in the same direction). I also thought that a slip was anti spin and at the stall will have a yaw...
Forum: RV-7/7A 11-23-2021, 08:03 AM
Replies: 10
Views: 754
Posted By lr172
Cross overs are like headers on a performance...

Cross overs are like headers on a performance car. They can increase flow during the In/Ex overlap and help pull more air fuel into the chamber, displacing more exhaust, thus creating more power. ...
Forum: Glass Cockpit 11-22-2021, 12:34 PM
Replies: 15
Views: 747
Posted By lr172
I did this for my door open light. The door...

I did this for my door open light. The door sensor switch closes to ground. That ground went to both a relay coil (12V fed to the other side) to illuminate the LED lamp and the discrete input for...
Forum: Fiberglass 11-22-2021, 09:44 AM
Replies: 8
Views: 590
Posted By lr172
I bought a coloring kit designed for gel coat...

I bought a coloring kit designed for gel coat from a marine supplier.
Forum: Flight Testing 11-22-2021, 08:08 AM
Replies: 30
Views: 3,491
Posted By lr172
Peoples lungs are different and absorb O2 at...

Peoples lungs are different and absorb O2 at different rates. I would expect 2 people to begin Symptoms at different times. There is a 50% chance that the pilot succumbs first and therefore the...
Forum: RV General Discussion/News 11-22-2021, 07:59 AM
Replies: 27
Views: 2,475
Posted By lr172
Some impressive work here. Thanks for sharing...

Some impressive work here. Thanks for sharing the details.

Larry
Forum: RV General Discussion/News 11-21-2021, 12:42 PM
Replies: 62
Views: 4,763
Posted By lr172
I have 800 hours on my 320 in the 6. I fly a lot...

I have 800 hours on my 320 in the 6. I fly a lot in the winter with CHTs from 275-325. Checked the exh valves a few hours ago and zero lead deposits on the valves. Need to be cautious with some of...
Forum: Electrical Systems 11-21-2021, 08:55 AM
Replies: 7
Views: 626
Posted By lr172
can't really help on the bulk of your issues. ...

can't really help on the bulk of your issues. You will need to trace the full wiring to see what was done and why it is not working. On the above, yes, this is likely how you are getting hi and low...
Forum: RV General Discussion/News 11-21-2021, 08:29 AM
Replies: 62
Views: 4,763
Posted By lr172
Lyc recommends OT no lower than 160. Not sure...

Lyc recommends OT no lower than 160. Not sure how big of a deal it is to run at 140 or 150. I suspect that the only issue, assuming a 20w50 oil is used, is that moisture removal from the oil is...
Forum: RV General Discussion/News 11-21-2021, 08:16 AM
Replies: 3
Views: 542
Posted By lr172
Do some searching here, as many have posted their...

Do some searching here, as many have posted their test results. Seems most find the sink rate for the 4,6,7,8 is between 8.5 and 10:1 at best glide speed, which also seems to vary a bit across...
Forum: RV General Discussion/News 11-21-2021, 08:08 AM
Replies: 23
Views: 1,277
Posted By lr172
You'll need to back that up with something. ...

You'll need to back that up with something. There are millions of cars, planes and industrial equipment that sits out side in the frigid northern part of our continent and have heard NOTHING about...
Forum: RV General Discussion/News 11-21-2021, 07:59 AM
Replies: 23
Views: 1,277
Posted By lr172
Don't listen to comments like that. They are...

Don't listen to comments like that. They are based upon opinions, not science or facts. I know guys that also find it abusive to not wash the planes belly after each flight. My plane sits on the...
Forum: RV General Discussion/News 11-21-2021, 07:55 AM
Replies: 23
Views: 1,277
Posted By lr172
Not so good with metric, but I think that is...

Not so good with metric, but I think that is around 0 to -5 F. I have flown several times in weather like that and no issue with the canopy. The RV-6 heater is another matter though. Need a heavy...
Forum: Electrical Systems 11-20-2021, 09:58 AM
Replies: 7
Views: 447
Posted By lr172
The VR only passes field current, not output...

The VR only passes field current, not output current. Most use a 5A CB for this field current, so 20 gauge would be more appropriate for VR grounding than 10 Ga.

Larry
Forum: Flight Testing 11-20-2021, 09:07 AM
Replies: 30
Views: 3,491
Posted By lr172
Interesting, I would have expected a lower fuel...

Interesting, I would have expected a lower fuel flow. I haven't yet been above 15K in my 10 (limited to 18K due to basic med). At 14 or 15K, I have been getting 165 KTAS at around 9.4 GPH. I would...
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