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Search: Posts Made By: lr172
Forum: California Yesterday, 07:09 AM
Replies: 4
Views: 269
Posted By lr172
I don't have any but would be willing to make a...

I don't have any but would be willing to make a set for a reasonable fee. I have been doing more free lance machining in retirement.

Larry
Forum: Traditional Aircraft Engines 04-15-2021, 11:48 AM
Replies: 3
Views: 226
Posted By lr172
The cold air sumps, I believe, were developed to...

The cold air sumps, I believe, were developed to allow folks to extract a bit more HP, by eliminatng the heating. I suspect that they have a larger plenum area and this is the primary reason for the...
Forum: RV General Discussion/News 04-15-2021, 11:45 AM
Replies: 17
Views: 654
Posted By lr172
I had that issue on the 6. On the 10, I made a...

I had that issue on the 6. On the 10, I made a custom mount that leaves the ipad very close to the inst. panel. WIth this approach, the dash overlap shields the ipad from most sunlight and I have...
Forum: Autopilots 04-15-2021, 11:36 AM
Replies: 4
Views: 224
Posted By lr172
best to read the manuals for guidance. The...

best to read the manuals for guidance. The tracking sensitivity is set by both the roll servo gain AND a lateral tracking gain that I cannot remeber the name of. They need a bit of finessing to get...
Forum: Traditional Aircraft Engines 04-14-2021, 01:24 PM
Replies: 3
Views: 226
Posted By lr172
For a long time, carb'ed auto engines would run...

For a long time, carb'ed auto engines would run an exhaust passage through the intake manifold with the purpose of heating the air fuel mixture after the carb. The advantage is that heating helps to...
Forum: Fuel Injection Systems 04-14-2021, 01:18 PM
Replies: 7
Views: 259
Posted By lr172
Pretty much every car produced in the last 30...

Pretty much every car produced in the last 30 years has a fuel return setup similar to what you describe. Clearly there are no issues with this type of arrangement, include heat related problems. ...
Forum: Autopilots 04-13-2021, 07:33 AM
Replies: 6
Views: 430
Posted By lr172
They give you a button in config mode that has...

They give you a button in config mode that has the AP actuate trim in different directions to confirm that the orientation matches your wiring. There is also a setting to reverse the orientation if...
Forum: Traditional Aircraft Engines 04-12-2021, 11:40 AM
Replies: 32
Views: 2,883
Posted By lr172
If he is any good, he would have measured it...

If he is any good, he would have measured it before making that statement.
Forum: Autopilots 04-12-2021, 11:22 AM
Replies: 4
Views: 261
Posted By lr172
Not a CAN bus. Dynon uses an RS-44X (can't...

Not a CAN bus. Dynon uses an RS-44X (can't remember that number ) protocol and it requires that the A & B pairs be twisted. similar protocol as that which ARINC uses. I do not recommend going...
Forum: RV-10 04-12-2021, 08:46 AM
Replies: 6
Views: 584
Posted By lr172
It is possible that your stops are allowing more...

It is possible that your stops are allowing more travel than required. I would ensure that full right stick against your thigh delivers the minimum deflection angle called out in the plans. If that...
Forum: Traditional Aircraft Engines 04-12-2021, 08:28 AM
Replies: 6
Views: 186
Posted By lr172
Pretty sure there are two versions of the sump...

Pretty sure there are two versions of the sump with different ID's. the -12 and -32 carbs had different throat size and different sumps to match with them.

Larry
Forum: Traditional Aircraft Engines 04-12-2021, 08:19 AM
Replies: 32
Views: 2,883
Posted By lr172
The standard is 200 ROP when full rich, WOT at...

The standard is 200 ROP when full rich, WOT at sea level. It is nice to have that margin for detonation prevention on Take off. You should be more worried about WOT SL than at cruise, as that is...
Forum: RV Ongoing Maintenance Issues 04-12-2021, 08:02 AM
Replies: 20
Views: 1,776
Posted By lr172
Looks like at least 3-5 thou of deposits on the...

Looks like at least 3-5 thou of deposits on the seat and therefore 3-5 thou of clearance. If the valve was touching the seat in that spot, the deposits wouldn't be there or at least would be shinny,...
Forum: Traditional Aircraft Engines 04-12-2021, 07:43 AM
Replies: 20
Views: 2,101
Posted By lr172
+1 As long as the pitting doesn't extend into...

+1

As long as the pitting doesn't extend into the radius area, it seems the likelihood of catastrophic failure is pretty low. I believe it is a low stress area. That said, I don't think I would...
Forum: RV-10 04-12-2021, 07:12 AM
Replies: 23
Views: 2,084
Posted By lr172
I am 6' / 200 and have a home made arm rest that...

I am 6' / 200 and have a home made arm rest that is similar to the aerosport. It does nothing to make the cabin feel less roomy, It is great for storage and love having a place to rest my arm. It...
Forum: RV-9/9A 04-10-2021, 12:14 PM
Replies: 19
Views: 1,624
Posted By lr172
That's where mine is, though I still havent used...

That's where mine is, though I still havent used it yet.
Forum: Traditional Aircraft Engines 04-10-2021, 12:09 PM
Replies: 15
Views: 1,128
Posted By lr172
a minute or two after shutdown, the fuel in the...

a minute or two after shutdown, the fuel in the spider lines boils and dumps the fuel in the cylinders; This is why it needs a special procedure. Quite unikely you can get a large enough fan in...
Forum: RV-10 04-09-2021, 11:21 AM
Replies: 5
Views: 553
Posted By lr172
Oh, the sweet memories of the panel upgrade on my...

Oh, the sweet memories of the panel upgrade on my 6 :eek:
Forum: RV-6/6A 04-09-2021, 11:00 AM
Replies: 4
Views: 256
Posted By lr172
I chose the RV-7 stiffner kit. The RV-6 plans...

I chose the RV-7 stiffner kit. The RV-6 plans include a process and pics of using fiberglass to create a reinforcement. This, or similar approach, would seem the best route for a painted airplane
Forum: RV General Discussion/News 04-08-2021, 12:15 PM
Replies: 20
Views: 722
Posted By lr172
+1 I missed the part about the mix. No real...

+1

I missed the part about the mix. No real mogas experience here to help. Though I would expect that 50% avgas would eliminate any vapor lock issues, especially with spring temps vs summer. Have...
Forum: RV-7/7A 04-08-2021, 11:48 AM
Replies: 14
Views: 551
Posted By lr172
You might be surprised how high a percentage of...

You might be surprised how high a percentage of weight is carried above your hips (your organs are quite heavy) and your lower seat cushion must carry it all if not reclined; mostly concentrated in...
Forum: RV-7/7A 04-08-2021, 11:38 AM
Replies: 14
Views: 551
Posted By lr172
I just step on them. Just can't see how my shoe...

I just step on them. Just can't see how my shoe is any different than the bottom of my pants or the back of my shirt that will be in contact with the seat cover for hours. Any liguid or debris will...
Forum: RV General Discussion/News 04-08-2021, 11:33 AM
Replies: 20
Views: 722
Posted By lr172
sounds like a failing fuel pump. I would not...

sounds like a failing fuel pump. I would not test fate with another flight before either replacing it or finding an alternate reason that the mechanical pump won't work but the boost pump does, like...
Forum: RV Building Tips/Techniques 04-08-2021, 09:26 AM
Replies: 17
Views: 1,637
Posted By lr172
If I were to go to that level of testing, I would...

If I were to go to that level of testing, I would plumb in a 1/4" NPT fitting and apply an air hose connection. Pump up the regulator to 50-60 PSI and use soapy water on each connection. Could also...
Forum: RV-9/9A 04-08-2021, 07:56 AM
Replies: 43
Views: 12,106
Posted By lr172
The plans for the 6 have you cut a hole in the...

The plans for the 6 have you cut a hole in the firewall to get a socket on the nut. You then make a small cover and adhere it with proseal/RTV or pop rivet it on. As Don mentioned, you probably can...
Forum: RV Ongoing Maintenance Issues 04-08-2021, 07:51 AM
Replies: 14
Views: 1,895
Posted By lr172
I get a lot more than 100 hours on both the Matco...

I get a lot more than 100 hours on both the Matco and Rapcos. First suggestion would be to experiment with using rudder only in taxi when possible. I also retract flaps after touchdown and use more...
Forum: RV General Discussion/News 04-08-2021, 07:04 AM
Replies: 19
Views: 3,973
Posted By lr172
From my research, bearing classes come from the...

From my research, bearing classes come from the post production measurements. All of the classes are built on the same production run, but seperated based upon dimensional tolerences. The higher...
Forum: RV-10 04-07-2021, 08:25 AM
Replies: 51
Views: 13,670
Posted By lr172
I don't buy that. Don't see how the trim system...

I don't buy that. Don't see how the trim system puts more load on the heim bearing than pilot induced forces during flying. Trim forces are pretty light compared to forces induced via the control...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 04-05-2021, 10:54 AM
Replies: 18
Views: 1,495
Posted By lr172
I completely get this. I have had several...

I completely get this. I have had several occasions where I see another aircraft on my screen. I see them climb, then descend, a left turn then a right. Very frustrating as I don't know how to get...
Forum: RV Ongoing Maintenance Issues 04-05-2021, 10:33 AM
Replies: 11
Views: 639
Posted By lr172
My read is that you have a leak in the left...

My read is that you have a leak in the left master cylinder(s). If you can traditional bleed from the right but not the left, it implies that the stat-o-seal or other o-ing in the left M/C is...
Forum: Traditional Aircraft Engines 04-05-2021, 10:22 AM
Replies: 32
Views: 2,883
Posted By lr172
The bowl vent is not exposed to ram air. If it...

The bowl vent is not exposed to ram air. If it was, the excess pressure on top of the fuel in the bowl would cause a rich condition, not lean. The same way that higher float settings cause rich...
Forum: Traditional Aircraft Engines 04-05-2021, 09:06 AM
Replies: 32
Views: 2,883
Posted By lr172
WOW. 50* ROP at 8000 with full rich is quite...

WOW. 50* ROP at 8000 with full rich is quite lean. seems a jet change is in order, assuming you have confirmed that the mixture cable installation is allowing the arm on the carb to go full travel....
Forum: RV Ongoing Maintenance Issues 04-05-2021, 08:52 AM
Replies: 20
Views: 1,776
Posted By lr172
I would not lap a valve until I knew why it was...

I would not lap a valve until I knew why it was leaking. Several reasons for a leaking exh valve and not all can be resolved with simply lapping the interface.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 04-05-2021, 07:49 AM
Replies: 18
Views: 1,495
Posted By lr172
In my experience, the Class C airspaces WANT to...

In my experience, the Class C airspaces WANT to talk with anyone near their airspace. I go to milwaukee often and they ASK that I check in with them so everyone is coordianted. They have made the...
Forum: Traditional Aircraft Engines 04-04-2021, 12:50 PM
Replies: 44
Views: 3,607
Posted By lr172
Piston wall clearance on a Lyc is .0025-004, if I...

Piston wall clearance on a Lyc is .0025-004, if I remember correctly. Exactly the same as an old school Chevy small block. Low end on the ring gap is also the same as a small block (around .025),...
Forum: RV Ongoing Maintenance Issues 04-04-2021, 07:31 AM
Replies: 6
Views: 776
Posted By lr172
polyester filler is the standard in auto body...

polyester filler is the standard in auto body repair and has been used on millions of repairs. Yes it shrinks a very small amount in the first 30-90 days and is then VERY stable over time.
What is...
Forum: Traditional Aircraft Engines 04-03-2021, 10:11 AM
Replies: 7
Views: 331
Posted By lr172
given the coincidence with noise in the headset,...

given the coincidence with noise in the headset, I would be looking for an issue with grounding or something throwing noise on the power bus or ground. EGT sensor use a VERY low current and can't...
Forum: RV General Discussion/News 04-03-2021, 08:39 AM
Replies: 62
Views: 5,136
Posted By lr172
I'm in with one guest.

I'm in with one guest.
Forum: RV General Discussion/News 04-03-2021, 08:37 AM
Replies: 40
Views: 1,978
Posted By lr172
Totally unrelated. The FAA prohibits commercial...

Totally unrelated. The FAA prohibits commercial activity or use (pay for service delivered). That has nothing to do with ownership.
Forum: Traditional Aircraft Engines 04-03-2021, 08:21 AM
Replies: 32
Views: 2,883
Posted By lr172
9.5 GPH at 7500' is right around or a bit higher...

9.5 GPH at 7500' is right around or a bit higher than max power (approx 75-100 ROP). I routinely run 8 GPH at 8000', which is around 20-40 LOP. Rejetting is not your answer, at least at cruise. ...
Forum: RV General Discussion/News 04-03-2021, 08:13 AM
Replies: 2
Views: 411
Posted By lr172
I am guessing that you did not configure the...

I am guessing that you did not configure the engine parameters correctly in config mode, assuming that your map reads near barometric pressure with the engine off.
Forum: RV-14 04-03-2021, 08:01 AM
Replies: 7
Views: 402
Posted By lr172
I got burned doing one of my tanks. Somewhere...

I got burned doing one of my tanks. Somewhere during the process, you have to hit enter twice for the data to be saved. Can't say whether or not the calibration values were there, but I was able to...
Forum: RV General Discussion/News 04-02-2021, 08:35 AM
Replies: 40
Views: 1,978
Posted By lr172
Where do you find one? I have a substantial...

Where do you find one? I have a substantial umbrella policy (auto, home, etc.), but it specifically excludes aviation and thought that was pretty standard from most insurers.

Larry
Forum: RV General Discussion/News 04-01-2021, 11:43 AM
Replies: 40
Views: 1,978
Posted By lr172
I partially agree with the above. Though I still...

I partially agree with the above. Though I still believe that they would sue the pilot for negligence, if he had substantial assets or good insurance. However, the OP clearly stated that he is not...
Forum: RV General Discussion/News 04-01-2021, 11:13 AM
Replies: 40
Views: 1,978
Posted By lr172
Sorry, but don't buy that. If I slam my plane...

Sorry, but don't buy that. If I slam my plane into a house, I, as the pilot, am liable for the damages created. Sure, they will try to also sue the aircraft owner, if other than me, but that...
Forum: RV General Discussion/News 04-01-2021, 08:42 AM
Replies: 40
Views: 1,978
Posted By lr172
Other than taxes, I can't think of one. ...

Other than taxes, I can't think of one. Liability is on the pilot, not the aircraft, so don't see how it helps there.

Larry
Forum: RV Ongoing Maintenance Issues 04-01-2021, 07:53 AM
Replies: 13
Views: 876
Posted By lr172
Neat Idea. I am going to make one of those...

Neat Idea. I am going to make one of those today! Definitely beats holding a bag under the filter. Curious if you need to punch a hold in the top to get it to drain. I believe that the auto...
Forum: RV Ongoing Maintenance Issues 04-01-2021, 07:19 AM
Replies: 13
Views: 963
Posted By lr172
Another opinion: I believe that the black carbon...

Another opinion:

I believe that the black carbon in the guides is coked (i.e. burned / oxidized) oil. The lycoming suffers from poor oil flow qty to the valve area and exhaust valves get a good...
Forum: Traditional Aircraft Engines 03-31-2021, 07:56 AM
Replies: 9
Views: 431
Posted By lr172
When I did my 540 overhaul a year ago and had to...

When I did my 540 overhaul a year ago and had to buy all new injuectors, Kyle recommend .025's for my setup.
Forum: Traditional Aircraft Engines 03-31-2021, 07:54 AM
Replies: 9
Views: 431
Posted By lr172
You need a better opinion than the one you got. ...

You need a better opinion than the one you got. He is wrong. You can do much better. Send that data to airflow performance. You will get much better advice and guidance.

Larry
Forum: Close Calls / Lessons Learned 03-31-2021, 07:25 AM
Replies: 79
Views: 7,598
Posted By lr172
Due to the clogged pitot, tho OP's airspeed...

Due to the clogged pitot, tho OP's airspeed indication was below stall. The AP will not engage at speeds below stall.
Forum: RV General Discussion/News 03-30-2021, 10:38 PM
Replies: 69
Views: 6,497
Posted By lr172
I am not a chemist and have no idea. I just know...

I am not a chemist and have no idea. I just know their story and know that the military bought a LOT of it for the radial engine planes. I assume they saw evidence of it's benefits. Not a good day...
Forum: RV-12/RV-12iS 03-30-2021, 11:26 AM
Replies: 21
Views: 1,395
Posted By lr172
It is distortion from the welding, not heat...

It is distortion from the welding, not heat treating. Warpage (rapidly cooling metal in the HAZ shrinks) during welding operations is quite common and good welders will compensate in the setup. If...
Forum: RV-10 03-30-2021, 11:07 AM
Replies: 7
Views: 624
Posted By lr172
I would consider changing to an SB wing, as the...

I would consider changing to an SB wing, as the time added may equal the wait time for QB. I would do my avionics and all fuse wiring while waiting. Use the time to learn and do your own panel and...
Forum: RV General Discussion/News 03-30-2021, 08:12 AM
Replies: 69
Views: 6,497
Posted By lr172
actually MMO was designed pre-WWII as an additive...

actually MMO was designed pre-WWII as an additive to be mixed with gasoline to improve lead scavaging in radial engines. The military was the largest customer back then. I believe it works by...
Forum: Close Calls / Lessons Learned 03-30-2021, 07:54 AM
Replies: 79
Views: 7,598
Posted By lr172
Thanks so much for sharing this. I know that I...

Thanks so much for sharing this. I know that I over study these types of events when they happen to me to extract as much learning as possible for the next flight. Going through your experience in...
Forum: RV-7/7A 03-26-2021, 07:46 AM
Replies: 34
Views: 2,113
Posted By lr172
25 is quite low in my opinion. Glad that you...

25 is quite low in my opinion. Glad that you have been lucky, but I feel that luck is more in play here. That leaves little margin and as many know, our tires tend to lose a good amount of...
Forum: Traditional Aircraft Engines 03-25-2021, 08:17 AM
Replies: 11
Views: 806
Posted By lr172
Suggest you first try a different method for...

Suggest you first try a different method for starting before addressing engine problems beyond clogged primers. Try this and see what happens:

Skip the primer step (to eliminate issues with primer...
Forum: Glass Cockpit 03-23-2021, 11:06 AM
Replies: 7
Views: 440
Posted By lr172
in addition to the calibration, there is a manual...

in addition to the calibration, there is a manual offset for pitch indication. I just don't remember where it is in the menu structure. Look at the manual. The calibration just puts an offset in...
Forum: Electrical Systems 03-23-2021, 08:41 AM
Replies: 25
Views: 1,182
Posted By lr172
I am sure this is obvious to most, however, the...

I am sure this is obvious to most, however, the reason this default exists is that if you lose your dimmer power supply for any reason, you will likely be unable to see your efis during the daylight...
Forum: RV Ongoing Maintenance Issues 03-23-2021, 08:29 AM
Replies: 28
Views: 5,283
Posted By lr172
I made a valve wobble test tool that also...

I made a valve wobble test tool that also compresses the valve spring. Not the best tool for removing a valve, but a very good tool for doing the wobble test, as the fixture both compresses the...
Forum: Primers 03-22-2021, 09:02 AM
Replies: 6
Views: 722
Posted By lr172
Agree with Dans comments, but wanted to note that...

Agree with Dans comments, but wanted to note that this approach is a really bad idea for any exterior surface that will be top coated with a gloss. This work must be done with sandpaper and some...
Forum: Electrical Systems 03-21-2021, 08:28 AM
Replies: 61
Views: 6,133
Posted By lr172
16 port NT or Mitel analog line card.

16 port NT or Mitel analog line card.
Forum: Traditional Aircraft Engines 03-19-2021, 07:47 AM
Replies: 5
Views: 542
Posted By lr172
No galling there. The valve stem is polished...

No galling there. The valve stem is polished steel and the guide is something softer (usually bronze, but Lyc may have gone to something different) and is reamed to size. The are not fitted with...
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