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Search: Posts Made By: lr172
Forum: RV-10 10-16-2021, 11:23 AM
Replies: 8
Views: 525
Posted By lr172
It is not the UV that is your issue. It is the...

It is not the UV that is your issue. It is the oils and contaminants settling on the top. They create issues with paint adhesion and are difficult to remove from porous surfaces. At a minimum let...
Forum: RV Ongoing Maintenance Issues 10-15-2021, 11:25 AM
Replies: 9
Views: 506
Posted By lr172
Good catch. That support strap is a 3/16" steel...

Good catch. That support strap is a 3/16" steel strap who's primary purpose in life is to avoid the side load on the Alt pivot bolt. That Alt bracket is not designed to take that side load; it is...
Forum: RV-14 10-15-2021, 07:56 AM
Replies: 20
Views: 2,924
Posted By lr172
I would test these if I were you. I made...

I would test these if I were you. I made something similar for the 6 and has worked very well for years. I made something similar for the 10 and it popped out during a heavy wind event in Iowa. I...
Forum: GPS 10-15-2021, 07:38 AM
Replies: 4
Views: 310
Posted By lr172
The scaling issue is for approaches and not used...

The scaling issue is for approaches and not used for other tracking. Not sure on the legalities, but keep in mind that in enroute mode, full deflection is 5 miles off course and when scaled for the...
Forum: Midwest 10-15-2021, 07:27 AM
Replies: 7
Views: 308
Posted By lr172
I know a few in Chicago that have no issues with...

I know a few in Chicago that have no issues with RVs.
Forum: Traditional Aircraft Engines 10-15-2021, 07:15 AM
Replies: 4
Views: 269
Posted By lr172
In my 10, I get moderately low fuel pressures in...

In my 10, I get moderately low fuel pressures in the climb in hotter ambients; Never on cooler days and always in the later part of the climb where temps are rising due to the thinner air. In the...
Forum: RV-8/8A 10-14-2021, 10:49 AM
Replies: 8
Views: 1,377
Posted By lr172
Don't want to start a debate, but the builders...

Don't want to start a debate, but the builders liability cannot be eliminated like this. If this is a concern to the OP, do your research. Generally speaking, the builders concern is that if a...
Forum: RV General Discussion/News 10-11-2021, 11:08 AM
Replies: 35
Views: 3,336
Posted By lr172
Pretty sure that your Op Lim's call out this...

Pretty sure that your Op Lim's call out this paragraph as required and therefore it is compulsory for EAB. I know that they call out speicifc FARs for IFR and night VFR equipage and would be...
Forum: COMM 10-09-2021, 12:37 PM
Replies: 12
Views: 677
Posted By lr172
I rivet on a doubler and then rivet on nutplates....

I rivet on a doubler and then rivet on nutplates. As long as you use the taperred star washers on the antenna mounting, you can then paint the entire fuse bottom and install antenna later. Ground...
Forum: Safety 10-07-2021, 08:01 AM
Replies: 19
Views: 1,809
Posted By lr172
I got good advice from my CFI during transition...

I got good advice from my CFI during transition training. He said to not worry about skimming a cloud on that type of maneuver if things get dicey. He indicated that numerous loss of control...
Forum: RV-4 10-07-2021, 07:01 AM
Replies: 11
Views: 604
Posted By lr172
I have 6, so very similar but a bit heavier I...

I have 6, so very similar but a bit heavier I think and more drag. My 320 (160 HP) has been to 13,500 and climb was still around 250. I am guessing 15 or 16 would be near the limit (patience not...
Forum: VAF Classifieds (posts in here deleted after 30 days) 10-05-2021, 12:56 PM
Replies: 1
Views: 233
Posted By lr172
new or used?

new or used?
Forum: RV-10 10-05-2021, 12:35 PM
Replies: 6
Views: 594
Posted By lr172
390 at LOP cruise seems pretty high, unless only...

390 at LOP cruise seems pretty high, unless only 10-20* LOP, and might indicate an issue other than mixture, eventhough a fatter mixture makes it better. My GAMI spread is about .3 (not possible to...
Forum: Traditional Aircraft Engines 09-30-2021, 07:42 AM
Replies: 6
Views: 969
Posted By lr172
I would suggest that possibly there is too much...

I would suggest that possibly there is too much resistance in the wires or plugs, causing difficulty for the spark to jump the gap in the cap/rotor. Slick has also had some quality control issues...
Forum: RV-9/9A 09-30-2021, 07:33 AM
Replies: 1
Views: 453
Posted By lr172
PM sent. Larry

PM sent.

Larry
Forum: Electronic Ignition Systems 09-30-2021, 07:18 AM
Replies: 31
Views: 2,712
Posted By lr172
That's interesting. On the 10, my EI does 23*...

That's interesting. On the 10, my EI does 23* down low and starts to advance around 25". During ROP climbs, once I got to around 8000' my CHTs would start to rise aggressively and by 14,000 I was...
Forum: Fuel Injection Systems 09-30-2021, 06:59 AM
Replies: 19
Views: 1,062
Posted By lr172
From my research, the diaphragm pumps can flow a...

From my research, the diaphragm pumps can flow a lot. However they sacrifice pressure as the volume goes up (inverse relationship). The FI servos can deal with a very wide range of pressure inputs....
Forum: Traditional Aircraft Engines 09-27-2021, 11:36 AM
Replies: 4
Views: 639
Posted By lr172
This is true. With one polarity, the tangs wear...

This is true. With one polarity, the tangs wear and with the other, the center electrode wears.
Forum: Midwest 09-27-2021, 11:31 AM
Replies: 4
Views: 404
Posted By lr172
No approaches at Schaumburg, but otherwise easy...

No approaches at Schaumburg, but otherwise easy access. 1 Mile from Metra trains, but they go downtown and would need to hop the El to get to wrigley area. Drive time to wrigley about the same as...
Forum: Traditional Aircraft Engines 09-26-2021, 10:29 AM
Replies: 4
Views: 639
Posted By lr172
On a mag, the polarity reverses on each spark...

On a mag, the polarity reverses on each spark event. 1 is norm, 3 is reversed, 2 is normal, 4 is reversed. That is if my recall on the firing order was correct. Norm and reverse is illustrative,...
Forum: Traditional Aircraft Engines 09-26-2021, 10:21 AM
Replies: 9
Views: 616
Posted By lr172
I would start with Idle mixture. They are often...

I would start with Idle mixture. They are often very far off (overly rich) when they come from the factory. It should be adjusted before first flight. Probably too rich. Runs ok cold, as cold...
Forum: RV General Discussion/News 09-23-2021, 09:33 AM
Replies: 32
Views: 2,895
Posted By lr172
That was a pain and a fiasco. I remember they...

That was a pain and a fiasco. I remember they even re-did all the highway speed limit signs in both measures. Cars were a major pain with half the bolts SAE and the other half metric. Still kinda...
Forum: RV-10 09-22-2021, 08:03 AM
Replies: 58
Views: 9,162
Posted By lr172
Your math seems to jive with the recently posted...

Your math seems to jive with the recently posted system's claim of 8000 BTU's of cooling, drawing a max of 80 amps. However, your data seems to be based upon a Freon system, where the recently...
Forum: Traditional Aircraft Engines 09-21-2021, 11:05 AM
Replies: 6
Views: 461
Posted By lr172
300-325 is a bit more realistic. With no...

300-325 is a bit more realistic. With no experience, I suspect that the sparkplug ring probes may read 20-30* lower than the traditional type and that would bring your temps closer to typical.

Larry
Forum: Traditional Aircraft Engines 09-21-2021, 09:17 AM
Replies: 6
Views: 461
Posted By lr172
250-300 in climb in the summer seems too low to...

250-300 in climb in the summer seems too low to be right. Suggest verifying probe accuracy. Also look for probe mismatch. Type k probes with type c configured, etc.
Forum: Traditional Aircraft Engines 09-21-2021, 07:39 AM
Replies: 12
Views: 1,094
Posted By lr172
If the cylinders have rust, good chance there is...

If the cylinders have rust, good chance there is rust on many other parts inside the engine, including cam and lifters. Pretty good chance this could be an expensive exercise.
Forum: RV-10 09-20-2021, 07:32 AM
Replies: 17
Views: 1,061
Posted By lr172
You can use the 1.2" ray allen position sensor (I...

You can use the 1.2" ray allen position sensor (I made something very similar with a linear pot). You mount it under the rear passenger cover panel and make a mounting arrangement with a lever arm...
Forum: RV General Discussion/News 09-20-2021, 07:30 AM
Replies: 5
Views: 516
Posted By lr172
If you are starting at 1000 RPMs, the mixture is...

If you are starting at 1000 RPMs, the mixture is controlled mostly by the idle mixture, not the red knob.

I have been to denver several times with DA over 10K and never had an issue starting with...
Forum: RV Ongoing Maintenance Issues 09-20-2021, 07:23 AM
Replies: 27
Views: 2,245
Posted By lr172
With the bottom cowl off, lay the top cowl in...

With the bottom cowl off, lay the top cowl in place and have someone hold the forward end at the normal position relative to the spinner. You can then easily use a flashlight to determine what type...
Forum: RV-12/RV-12iS 09-20-2021, 07:18 AM
Replies: 17
Views: 2,977
Posted By lr172
I would bridge a wire from the Pitot heat,...

I would bridge a wire from the Pitot heat, landing lights or similar sized (10 amps) source and wire directly to the pump via it's pigtail or pull the supply side wire from the pump switch and bridge...
Forum: RV General Discussion/News 09-18-2021, 07:01 AM
Replies: 28
Views: 3,220
Posted By lr172
I am not sure that reply is fair. I highly doubt...

I am not sure that reply is fair. I highly doubt more than 1 or 2% of the RV population flys without some type of Liability insurance. Therefore it is fair to make that claim. Clearly this post...
Forum: RV-10 09-18-2021, 06:54 AM
Replies: 23
Views: 2,860
Posted By lr172
+1 If you need ram air pressure in the vents, it...

+1

If you need ram air pressure in the vents, it is masking another problem in your fuel delivery system. I use a rivet head shaped termination. No ram pressure and likely a bit of venturi induced...
Forum: RV Building Tips/Techniques 09-18-2021, 06:41 AM
Replies: 32
Views: 1,680
Posted By lr172
for most bending, I used the slide over springs...

for most bending, I used the slide over springs that keep the roundness during bending. They came with a pipe flaring kit. For tighter radius bends, I used the hand held bending tool. You can get...
Forum: Electrical Systems 09-17-2021, 10:26 AM
Replies: 73
Views: 13,266
Posted By lr172
This was my understanding. However, in my case,...

This was my understanding. However, in my case, I have an external regulator with no connection to the stator. Spinning or not, it is drawing a alot of amps on the field as soon as the regulator...
Forum: Electrical Systems 09-17-2021, 10:23 AM
Replies: 73
Views: 13,266
Posted By lr172
First, the alternator is spinning while cranking...

First, the alternator is spinning while cranking the engine and second, when the voltage drops to 10 while cranking, the regulator is throwing the full current on the field, trying to bring it back...
Forum: RV General Discussion/News 09-17-2021, 10:19 AM
Replies: 25
Views: 2,195
Posted By lr172
First, most SLA batteries are AGM. They need the...

First, most SLA batteries are AGM. They need the matt to be sealed, unless using gel, which is very different than AGM. Second, the voltage drop on transmit is very unlikely to be related to the...
Forum: Traditional Aircraft Engines 09-17-2021, 07:42 AM
Replies: 22
Views: 2,144
Posted By lr172
My read of that statement is that they complied...

My read of that statement is that they complied with it, but they further state that it was not applicable. I would have to assume from this that a tear down was not completed. With a proper...
Forum: Traditional Aircraft Engines 09-17-2021, 07:35 AM
Replies: 21
Views: 3,078
Posted By lr172
Early on I used them. At 100 hours, analysis...

Early on I used them. At 100 hours, analysis came back all good with smiley faces. Inspection of filter showed large amounts of Aluminum particles. Piston pin caps were wearing away rapidly and...
Forum: RV General Discussion/News 09-17-2021, 07:24 AM
Replies: 12
Views: 1,118
Posted By lr172
I am thinking that the form may have changed. My...

I am thinking that the form may have changed. My Loda (issued very early) has language that says either I or a delegate has the privileges herein. Maybe the doc has changed and now it states that...
Forum: Electrical Systems 09-16-2021, 11:17 AM
Replies: 73
Views: 13,266
Posted By lr172
Yes, but your car has 3-4 times the cranking...

Yes, but your car has 3-4 times the cranking capacity of my 540. I leave it off to save the 5 amps and several HP load.

Larry
Forum: RV-10 09-16-2021, 07:30 AM
Replies: 58
Views: 9,162
Posted By lr172
I like this one. 8K btu is probably the most we...

I like this one. 8K btu is probably the most we can expect for a 12V electrical unit. If the price were right, I would consider one. I found a 90 amp alternator that I believe would fit into the...
Forum: RV-10 09-16-2021, 07:19 AM
Replies: 4
Views: 848
Posted By lr172
This must be variable a bit. I used MC seals on...

This must be variable a bit. I used MC seals on the doors and took several steps to seal up all air ingress points on the fuse. I did my phase I in winter and often had no vents open and no heat on...
Forum: Electrical Systems 09-16-2021, 07:06 AM
Replies: 73
Views: 13,266
Posted By lr172
Same here, though don't use the PP. The 6 has...

Same here, though don't use the PP. The 6 has 800 trouble free hours with this procedure.
Forum: RV-10 09-15-2021, 07:50 AM
Replies: 58
Views: 9,162
Posted By lr172
I am still anxiously waiting for you to share the...

I am still anxiously waiting for you to share the details of your AC installation. Your post from a year ago was very intriguing with lighter weight components.

Larry
Forum: RV Ongoing Maintenance Issues 09-15-2021, 07:20 AM
Replies: 9
Views: 596
Posted By lr172
WHen the co-pilot presses the PTT, do only the...

WHen the co-pilot presses the PTT, do only the other crew hear the audio or does it also transmit on the radio?

If you have a conventionally wired jack, with both PTT and Mic lo connections, via a...
Forum: RV General Discussion/News 09-14-2021, 08:18 AM
Replies: 12
Views: 946
Posted By lr172
Seems every rule has an exception. This one...

Seems every rule has an exception. This one seems to apply universally.
Forum: Traditional Aircraft Engines 09-13-2021, 08:03 AM
Replies: 15
Views: 950
Posted By lr172
Do you remember if the inside bore of the relief...

Do you remember if the inside bore of the relief assembly was the same size as the ball or larger (about 1.5 X ball size)? I assume there was no cage sticking out around the tappered seat on the...
Forum: Traditional Aircraft Engines 09-13-2021, 07:51 AM
Replies: 15
Views: 950
Posted By lr172
Your relief system MUST have some way of holding...

Your relief system MUST have some way of holding the ball centered over the tapered seat, otherwise you get high psi at idle and low psi at high RPM. It is either a cage attached to the crankcase OR...
Forum: Traditional Aircraft Engines 09-13-2021, 07:47 AM
Replies: 15
Views: 950
Posted By lr172
Re-read post, as i added. Also, if you are...

Re-read post, as i added. Also, if you are getting 75 psi at idle, your problem is NOT a weak spring. The fact that you saw 100 PSI at high RPM would indicate no issues with the sump. Please...
Forum: Traditional Aircraft Engines 09-13-2021, 07:31 AM
Replies: 15
Views: 950
Posted By lr172
Let me confirm. You were getting 15 at idle and...

Let me confirm. You were getting 15 at idle and 50 at cruise for a long time. You took apart and reassembled the relief valve and the next flight, you got 75 at idle and 45 in cruise? Followed by...
Forum: Traditional Aircraft Engines 09-12-2021, 01:07 PM
Replies: 23
Views: 2,060
Posted By lr172
If it were only take off that you got the...

If it were only take off that you got the misfires, then yes excess heat could be causing fuel heat issues with extra lean or extra rich depending upon vapor lock in the pump vs boiling fuel in the...
Forum: Traditional Aircraft Engines 09-12-2021, 10:25 AM
Replies: 23
Views: 2,060
Posted By lr172
Vapor lock should be seen at take off or in the...

Vapor lock should be seen at take off or in the climb far more often than in cruise, as this is where cooling air flow is the worst. CHTs at 430 should not, in and of themselves be causing misfires...
Forum: RV General Discussion/News 09-12-2021, 08:13 AM
Replies: 3
Views: 619
Posted By lr172
I don;t believe the blocks aret nylon. I thought...

I don;t believe the blocks aret nylon. I thought they were UHMW and have natural anti-friction properties. I lubed them on the 6 and did not on the 10 and notice no difference. petroleum based...
Forum: Safety 09-12-2021, 08:03 AM
Replies: 11
Views: 1,675
Posted By lr172
While the TOD numbers seem in line with...

While the TOD numbers seem in line with expectations, the FPM rates seem really low. Even at full gross, I get substantially better than 350 at 10,000' at 130+ KTAS. I don't think I am even that...
Forum: Electronic Ignition Systems 09-11-2021, 06:53 AM
Replies: 7
Views: 1,231
Posted By lr172
I made a very similar unit, though machined the...

I made a very similar unit, though machined the shaft instead of using one from a mag when I installed a megasquirt system on my 6. I made two and dont think I will use the second one (will likely...
Forum: Primers 09-09-2021, 02:42 PM
Replies: 6
Views: 546
Posted By lr172
chemical bonding window on SPI epoxy primer is 7...

chemical bonding window on SPI epoxy primer is 7 days, NOT 30. after 7 days, it must be scuffed and another coat of primer added.
Forum: Traditional Aircraft Engines 09-08-2021, 11:08 AM
Replies: 3
Views: 631
Posted By lr172
I did both of my cases with loctite anaerobic...

I did both of my cases with loctite anaerobic sealant & no silk thread (think it was 515 or 517)) and both have been leak free.

Larry
Forum: RV Building Tips/Techniques 09-08-2021, 08:01 AM
Replies: 8
Views: 943
Posted By lr172
re: alignment, I know that the leg fairings are...

re: alignment, I know that the leg fairings are very sensitive to alignment and even a small error will create yaw. The horizontal alignment of the pants will also create some yaw, but I believe not...
Forum: Midwest 09-08-2021, 07:55 AM
Replies: 6
Views: 531
Posted By lr172
I went to LMO last summer for a wedding and had a...

I went to LMO last summer for a wedding and had a good experience. Gas was cheaper and fees lower than BJC. Runways are shorter, but no issue for an RV.

Larry
Forum: RV General Discussion/News 09-08-2021, 07:18 AM
Replies: 6
Views: 1,536
Posted By lr172
The tosten is a bit unique with the post style...

The tosten is a bit unique with the post style mount.

I can make you an angled grip mount to your angle specifications that would slide into the existing post, if interested. I have been doing a...
Forum: RV General Discussion/News 09-07-2021, 11:19 AM
Replies: 27
Views: 2,688
Posted By lr172
+1 I would go 30 miles from the base station...

+1

I would go 30 miles from the base station with a different plane and see if it receives from the base station.

Larry
Forum: Electronic Ignition Systems 09-07-2021, 07:58 AM
Replies: 3
Views: 563
Posted By lr172
generally leaner mixtures require more advance...

generally leaner mixtures require more advance and lower MAPs require more advance, though less so than leaner mixtures. There should be no need to add advance when starting at higher altitudes...
Forum: RV General Discussion/News 09-06-2021, 08:18 AM
Replies: 14
Views: 1,319
Posted By lr172
This the interpretation that I settled on. I...

This the interpretation that I settled on. I remain convinced that the FAA is not trying to limit compensated instruction in EAB for owners and delegates (the language used in the LODA) that are not...
Forum: Traditional Aircraft Engines 09-06-2021, 07:53 AM
Replies: 28
Views: 1,524
Posted By lr172
This is unlikely. If the dynon were set up for a...

This is unlikely. If the dynon were set up for a 50 PSI sensor, it would mean he is getting 130-140 PSI actual pressure at cruise, when the dynon repots 45. The fact that he sometimes reads 55 PSI...
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