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Search: Posts Made By: lr172
Forum: Engine Monitors Yesterday, 10:29 AM
Replies: 11
Views: 810
Posted By lr172
I think that is your clue. WOT at 1000 MSL...

I think that is your clue. WOT at 1000 MSL should result in 29"+ of MAP. I would guess 3500 should result in 26 or 27". I would consider replacing the sender. Are you sure you don't have a...
Forum: Traditional Aircraft Engines Yesterday, 10:08 AM
Replies: 14
Views: 1,578
Posted By lr172
The case fretting does not produce a lot of metal...

The case fretting does not produce a lot of metal and I doubt it would show up. The only exposure that the studs have to oil is where the case halves come together at the split line. I think that...
Forum: RV-7/7A Yesterday, 09:48 AM
Replies: 21
Views: 1,204
Posted By lr172
I sand and clean the plastic after removing the...

I sand and clean the plastic after removing the provided tape. Then use 3M VHB or similar high strength tape. Has worked very well so far.

Larry
Forum: Electrical Systems Yesterday, 09:27 AM
Replies: 17
Views: 1,295
Posted By lr172
I have three of these (5 amp rated) gang'ed...

I have three of these (5 amp rated) gang'ed together to make a 24V supply for my 430. Howevever, I don't believe that I would trust them at my battery connection where a failure would knock out my...
Forum: RV Building Tips/Techniques 01-16-2021, 02:50 PM
Replies: 26
Views: 1,861
Posted By lr172
So, if that is the case, how are all of these...

So, if that is the case, how are all of these builder assist centers getting away with it. You can't say you built the plane if part of the work was done by staff at the build assist center,...
Forum: Traditional Aircraft Engines 01-16-2021, 10:39 AM
Replies: 14
Views: 1,578
Posted By lr172
Through stud is supposed to be a tight slip fit...

Through stud is supposed to be a tight slip fit fit with the case bore. Most shops, like Divco, won't let the case out with bolts that do not meet that spec. This type of fit should not allow any...
Forum: RV Building Tips/Techniques 01-16-2021, 10:24 AM
Replies: 26
Views: 1,861
Posted By lr172
Pretty sure this the same interpretation used by...

Pretty sure this the same interpretation used by all of the build support shops around the country. I have seen this several times and thought I even saw it in an FAA doc at one point. Also pretty...
Forum: Glass Cockpit 01-16-2021, 10:18 AM
Replies: 40
Views: 8,747
Posted By lr172
I used the 12 style rivet in the leading edge of...

I used the 12 style rivet in the leading edge of my 10. Worked well, though some thought and possible testing goes into the location/placement of the rivet. Not an aero engineer, but would think...
Forum: RV General Discussion/News 01-15-2021, 09:26 AM
Replies: 8
Views: 674
Posted By lr172
It is quite debatable that auto fuel is better. ...

It is quite debatable that auto fuel is better. However, the additive packages are very different and it's not surprising that there are additives in the auto fuel that can either break down the...
Forum: RV Building Tips/Techniques 01-15-2021, 09:03 AM
Replies: 26
Views: 1,861
Posted By lr172
also not correct. First, 49% of the work can and...

also not correct. First, 49% of the work can and often is done by commercial entities (QB kit is an example) For the 51%, You can pay for as much professional assistance as you like, including...
Forum: Traditional Aircraft Engines 01-15-2021, 08:52 AM
Replies: 14
Views: 1,578
Posted By lr172
Hard to tell if that is 1 or 2. Is it a through...

Hard to tell if that is 1 or 2. Is it a through stud or fixed stud? Not a lot of ways to get leaks at the stud, except a bad o-ring or damage bevel but would not expect that at the top. I had a...
Forum: Electrical Systems 01-14-2021, 09:03 PM
Replies: 7
Views: 282
Posted By lr172
It is a two wire RTD thermistor and industry best...

It is a two wire RTD thermistor and industry best practice is to use 2, paralleled wires in the connection of the + side of the thermistor and unit. As above, it is a shielded cable and they spec'd...
Forum: Electrical Systems 01-14-2021, 09:01 PM
Replies: 7
Views: 282
Posted By lr172
There is no need. That ring terminal goes to the...

There is no need. That ring terminal goes to the cable shield, which is likely already grounded to the common ground plane on the other side of teh cable. THey just wan't the shield grounded on...
Forum: RV Building Tips/Techniques 01-14-2021, 08:35 PM
Replies: 1
Views: 144
Posted By lr172
all of the brake fittings, except the pilot side...

all of the brake fittings, except the pilot side output, are standard plumbing fittings. You can get 1/4" brass compression fittings and ferrules from the hardware store. Be sure to get the brass...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-14-2021, 02:45 PM
Replies: 7
Views: 695
Posted By lr172
I have 8 of the 3/4" version left if anyone is...

I have 8 of the 3/4" version left if anyone is interested. Could possibly make more of the 5/8" if there is interest.

Someone asked for a 1" version for their fuel pump shroud. Please let me know...
Forum: RV Building Tips/Techniques 01-13-2021, 11:26 AM
Replies: 5
Views: 407
Posted By lr172
Assuming the blades have good clearance, make the...

Assuming the blades have good clearance, make the large spinner bulkhead a 2 piece design. Make the center piece almost as large in diameter as the bulkhead, using the original bulkhead as a...
Forum: RV Building Tips/Techniques 01-12-2021, 10:05 AM
Replies: 6
Views: 511
Posted By lr172
With my 6 and 10, I used an engine hoist with a...

With my 6 and 10, I used an engine hoist with a strap on the engine mount. Doing this, there is very little weight on the tail cone. Even my wife could hold it while I lifted the front and then set...
Forum: Electrical Systems 01-12-2021, 09:49 AM
Replies: 29
Views: 938
Posted By lr172
+1 Same here. I just soldered them together,...

+1

Same here. I just soldered them together, heat shrinked (style with adhesive to keep moisture out) and used cable ties to hold all the joints from flexing. Seems there is more risk than...
Forum: RV-10 01-12-2021, 09:27 AM
Replies: 21
Views: 1,532
Posted By lr172
I did mine just as he was coming out with that...

I did mine just as he was coming out with that spot lighting kit. I used a baja Pro in each wing tip. I feel they do a very nice job lighting up the runway on landing, just like my 6A with the same...
Forum: ADS-B 01-12-2021, 09:05 AM
Replies: 18
Views: 1,830
Posted By lr172
actually, it's not complex at all. The FAA just...

actually, it's not complex at all. The FAA just needs to stop making aircraft registration details available to the public. To my knowledge, it is the only vehilcle registration information that is...
Forum: RV Ongoing Maintenance Issues 01-09-2021, 11:57 AM
Replies: 26
Views: 7,513
Posted By lr172
If the alternator is not moving in its bracket,...

If the alternator is not moving in its bracket, next suspect is a defective belt. Two changes equalling 3/16" in a short amount of time seems excessive if you are sure it is the belt that is...
Forum: RV Ongoing Maintenance Issues 01-09-2021, 11:55 AM
Replies: 26
Views: 7,513
Posted By lr172
used. The new spec is over tight to account for...

used. The new spec is over tight to account for the initial relaxation.

Larry
Forum: Engine Monitors 01-09-2021, 11:44 AM
Replies: 11
Views: 810
Posted By lr172
No vent on a map sensor. Blockage with a liquid...

No vent on a map sensor. Blockage with a liquid (you can get thick carbon based liquid from the gas in the intake manifold) is my best guess. That would explain why it eventually equalizes.
Forum: Electrical Systems 01-08-2021, 03:54 PM
Replies: 14
Views: 614
Posted By lr172
Gold plated stranding would be even better, as...

Gold plated stranding would be even better, as long as no expense is being spared here. While there is some benefit to tinned strands, I fail to see the need for tefzel coating forward of the...
Forum: Traditional Aircraft Engines 01-08-2021, 12:37 PM
Replies: 18
Views: 1,260
Posted By lr172
For cold, I crack throttle 1/4" mixture full...

For cold, I crack throttle 1/4" mixture full rich. Boost pump to prime and time is variable based upon ambient temp (inverse logrithmic relationship between temp and prime required. Rarely an issue...
Forum: Glass Cockpit 01-08-2021, 10:05 AM
Replies: 4
Views: 349
Posted By lr172
I just had a bod config module on my non-touch. ...

I just had a bod config module on my non-touch. I replaced it with the newer, touch config module. All went well and required no re-configuration.

I suggest you attempt to install the new config...
Forum: Traditional Aircraft Engines 01-08-2021, 09:57 AM
Replies: 5
Views: 496
Posted By lr172
I don't see how that level of scoring could...

I don't see how that level of scoring could impact the structural integrity of a casting that thick that is loaded predominantly in compression. It wouldn't bother me and I expect that type of...
Forum: Electrical Systems 01-08-2021, 09:48 AM
Replies: 14
Views: 614
Posted By lr172
On my 6/320, I ran #4 cable from the solenoid to...

On my 6/320, I ran #4 cable from the solenoid to the starter. Spins like a champ. IMO, Tefzel is not required FW fwd, so I used std PVC battery cables.

Larry
Forum: Traditional Aircraft Engines 01-08-2021, 09:40 AM
Replies: 3
Views: 516
Posted By lr172
That only applies to the auto world where the...

That only applies to the auto world where the ZDDP levels were significantly reduced because 99.9% of the cars on the road have roller tappets and don't need it (it contributes to environmental...
Forum: RV Ongoing Maintenance Issues 01-08-2021, 09:20 AM
Replies: 38
Views: 3,410
Posted By lr172
+1 I would be very concerned about loose on...

+1

I would be very concerned about loose on removal. That is a clear sign that something is wrong with parts, oil system, fit up or installation technique. I have replaced a lot of oil filters in...
Forum: RV-8/8A 01-08-2021, 09:06 AM
Replies: 23
Views: 2,827
Posted By lr172
I have researched these type units for my 10. If...

I have researched these type units for my 10. If you look, you will also find 2500 watt units (designed for truck cabs) that will put out around 7-8000 BTU's and draw around 80-90 amps at 12 volts...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-07-2021, 09:33 AM
Replies: 7
Views: 586
Posted By lr172
I have a new RAMI antenna I would sell cheap. It...

I have a new RAMI antenna I would sell cheap. It is the type that uses porcelain insulators and ring terminals instead of BNC. I chose not to use it in my plane and should be fine for a ground...
Forum: RV-9/9A 01-07-2021, 09:10 AM
Replies: 34
Views: 3,026
Posted By lr172
I curise around 160 knots and usually descend at...

I curise around 160 knots and usually descend at 170. I use the 6 mile per 1000 feet rule. 500 FPM decent requires 6 nautical miles of distance to lose 1000 ft at 180 knots. Knowing the altitude...
Forum: RV Ongoing Maintenance Issues 01-07-2021, 09:06 AM
Replies: 26
Views: 7,513
Posted By lr172
I suspect you may not be tightening the bolts...

I suspect you may not be tightening the bolts enough. It is critical that both the top and bottom bolts be torqued appropriately to hold the alternator. If they are good and tight, you may have a...
Forum: RV-8/8A 01-07-2021, 08:48 AM
Replies: 25
Views: 1,758
Posted By lr172
It is surprising how different the setups can be....

It is surprising how different the setups can be. On my 6A, I don't think I have every gone above 190 more than twice and I routinely get 160 in the Chicago winters with an occassional 150 on...
Forum: RV-6/6A 01-06-2021, 02:17 PM
Replies: 16
Views: 1,094
Posted By lr172
Actually, on the 6, it is SS eye bolt welded to a...

Actually, on the 6, it is SS eye bolt welded to a 40 or 50 thou SS plate and bolted to the rear Vert Spar. It bends in the horizontal plane much more easily than the more modern appoach you...
Forum: Traditional Aircraft Engines 01-06-2021, 08:57 AM
Replies: 11
Views: 959
Posted By lr172
I don't believe that the shops are welding and...

I don't believe that the shops are welding and re-grinding cams, like happen in the automotive world. When I spoke to ASI, they stated that they only sand/polish them to correct lobe face angle /...
Forum: Traditional Aircraft Engines 01-05-2021, 12:38 PM
Replies: 11
Views: 1,140
Posted By lr172
Yes, I know. HOwever many folks don't know that,...

Yes, I know. HOwever many folks don't know that, so I used what I thought would be most universally understood. Those that know better, like you, also understand my meaning.
Forum: RV-10 01-05-2021, 12:30 PM
Replies: 7
Views: 844
Posted By lr172
I had some resistance in onee wing that prevented...

I had some resistance in onee wing that prevented the flap from fully hitting the rear spar, even with significant force. Luckily I noticed it and with some bending and filling, I got it to fully...
Forum: RV-10 01-05-2021, 10:24 AM
Replies: 7
Views: 844
Posted By lr172
I would DEFINATELY up the oil pressure. I...

I would DEFINATELY up the oil pressure. I believe Lyc states a minimum of 25 PSI at idle and that is usually on worn out engines. I believe they also require at least 55 PSI at cruise RPM. I would...
Forum: Traditional Aircraft Engines 01-05-2021, 10:20 AM
Replies: 11
Views: 959
Posted By lr172
Call Colorado Air Parts. They usually have a...

Call Colorado Air Parts. They usually have a good stock of cams that are overhauled by ASI and yellow tagged. Generally around $5-600 To avoid lifter spalling, the best bet is to use the newer...
Forum: COMM 01-05-2021, 10:11 AM
Replies: 24
Views: 967
Posted By lr172
Yes, it must be isolated from the panel ground. ...

Yes, it must be isolated from the panel ground. Otherwise you will very likely get a bunch of unwanted noise on the music input, especially if you are using a USB power port.
Forum: Traditional Aircraft Engines 01-05-2021, 10:03 AM
Replies: 22
Views: 2,048
Posted By lr172
The heat required for vaporizing lead (around...

The heat required for vaporizing lead (around 800-1000F, I recall) is the heat of the combustion gasses themselves and has nothing to do with the temperature of the barrel or the head, generally...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-05-2021, 10:00 AM
Replies: 4
Views: 680
Posted By lr172
Also willing to take it on if still interested.

Also willing to take it on if still interested.
Forum: Traditional Aircraft Engines 01-05-2021, 09:57 AM
Replies: 11
Views: 1,140
Posted By lr172
What I see from your graph is pretty much what I...

What I see from your graph is pretty much what I would expect running 100 weight oil at 40 degrees. Even Lycoming says it should ONLY be used over 60*. The spike you see is just a delay in the...
Forum: Tools 01-05-2021, 09:45 AM
Replies: 12
Views: 1,187
Posted By lr172
Pretty sure most, if not all, narrow decks use...

Pretty sure most, if not all, narrow decks use through bolts that thread into the left side of the case. Unsure if any wide decks use this method.
Forum: RV-10 01-05-2021, 08:46 AM
Replies: 7
Views: 681
Posted By lr172
I also made a custom door latch system, with a...

I also made a custom door latch system, with a center latch. However, I used the std Vans approach, using the UHMW pin blocks in the door. That is 1" thick, strong plastic that is screwed to the...
Forum: Electronic Ignition Systems 01-04-2021, 10:51 AM
Replies: 25
Views: 2,191
Posted By lr172
Yes. Your spark jumps an .035" gap on every...

Yes. Your spark jumps an .035" gap on every event. However, this stack up of resistance will greatly decrease spark energy, so no suprise that there wasn't enough energy to consistently lit a lean...
Forum: COMM 01-04-2021, 09:23 AM
Replies: 24
Views: 967
Posted By lr172
I assume the intercom uses the mini-Dsub...

I assume the intercom uses the mini-Dsub connectors. Those can be a challenge for folks new to them and you have to look very closely for strays before crimping, when using 22 ga. I would find at...
Forum: Traditional Aircraft Engines 01-04-2021, 08:59 AM
Replies: 22
Views: 2,048
Posted By lr172
What leads you to believe that this temp range is...

What leads you to believe that this temp range is bad for your cylinders? Do you know what bad things are happening at that temp?

Personally, I would do some research before fixing a problem that...
Forum: RV General Discussion/News 01-04-2021, 08:51 AM
Replies: 2
Views: 566
Posted By lr172
I don't, even here in the midwest. Seems like...

I don't, even here in the midwest. Seems like all kinds of risk with little benefit.

Larry
Forum: RV Building Tips/Techniques 01-02-2021, 04:12 PM
Replies: 5
Views: 415
Posted By lr172
I have a 3" cutoff tool that I use. Carbide burr...

I have a 3" cutoff tool that I use. Carbide burr in a die grinder; You want this for high speed. Other options will work though. Dremel will work, but go slow as it doesn't have a lot of torque.
Forum: RV General Discussion/News 01-02-2021, 02:48 PM
Replies: 132
Views: 19,020
Posted By lr172
Again, more generalizations. Please explain the...

Again, more generalizations. Please explain the icing risk in July, excluding trips to the North Pole.
Forum: RV Building Tips/Techniques 01-02-2021, 02:45 PM
Replies: 5
Views: 415
Posted By lr172
I hate drilling SS. I prefer a cut off wheel or...

I hate drilling SS. I prefer a cut off wheel or dremel and finish up with a carbide burr when the size will allow.
Forum: RV Ongoing Maintenance Issues 01-02-2021, 11:03 AM
Replies: 38
Views: 3,410
Posted By lr172
I asked for Mahlons opinion when dealing with an...

I asked for Mahlons opinion when dealing with an OP issue on my 10. He recommended no higher than 80 on hot cruise OP. His concern was from bursting parts with 100+ pressures when cold. I always...
Forum: RV-8/8A 01-02-2021, 10:52 AM
Replies: 44
Views: 4,710
Posted By lr172
It's interesting. I used lord mounts on the 6...

It's interesting. I used lord mounts on the 6 and the engine sagged almost a 1/4" over 500 hours (most of it in the first 100 hous). On the 10, I used whatever Van's supplied. Unsure, but think...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-01-2021, 01:48 PM
Replies: 7
Views: 695
Posted By lr172
Sorry for the delay in getting these out; Got...

Sorry for the delay in getting these out; Got wrapped up with holiday stuff. I will get everything in the mail on Monday.

Larry
Forum: RV-8/8A 12-31-2020, 09:24 AM
Replies: 44
Views: 4,710
Posted By lr172
How does this visual and tactile observation...

How does this visual and tactile observation translate into performance differences. I would think that a vibration analysis would be required to show that one or the other was transmitting more or...
Forum: Electronic Ignition Systems 12-31-2020, 08:54 AM
Replies: 37
Views: 1,574
Posted By lr172
Note that the AB6 is a non resistor plug. I have...

Note that the AB6 is a non resistor plug. I have tried them with resistor packs in the connector and still got noise in my system. Proceed with caution, though I never tested them without the...
Forum: RV-10 12-31-2020, 08:37 AM
Replies: 5
Views: 582
Posted By lr172
I would at least pull off that circle of paint. ...

I would at least pull off that circle of paint. Otherwise you run the risk that it continues to do it's thing and grow, making a large area of delaminated paint.
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-30-2020, 04:43 PM
Replies: 6
Views: 825
Posted By lr172
They are only $109 brand new ar HF

They are only $109 brand new ar HF
Forum: Traditional Aircraft Engines 12-30-2020, 01:19 PM
Replies: 15
Views: 1,200
Posted By lr172
Hottest CHT will be at 80-100* ROP. They cool a...

Hottest CHT will be at 80-100* ROP. They cool a bit as you lean to peak and then cool rapidly when leaner than that. CHTs also drop when richer than 80-100* ROP.
Forum: Electronic Ignition Systems 12-30-2020, 01:13 PM
Replies: 37
Views: 1,574
Posted By lr172
I bought the adapters from an outfit in the UK. ...

I bought the adapters from an outfit in the UK. Bought them via ebay. quality and price were good but needed a little touch up on the lathe. Have held up well.
Forum: Traditional Aircraft Engines 12-30-2020, 08:37 AM
Replies: 15
Views: 1,200
Posted By lr172
If you are only getting a 20-50* rise at 20" from...

If you are only getting a 20-50* rise at 20" from full rich, you have some major issues going on. I would expect at least a 150-200* rise from full rich to peak EGT at 20" Maybe less at 28", but at...
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