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Search: Posts Made By: lr172
Forum: Traditional Aircraft Engines Yesterday, 08:37 AM
Replies: 9
Views: 247
Posted By lr172
+1 Sounds more like an indication problem than a...

+1

Sounds more like an indication problem than a fuel delivery problem. Pretty hard to have a fuel issue that can cause an EGT to drop then regain 200* in 3 seconds.

Larry
Forum: Fuel Injection Systems Yesterday, 08:28 AM
Replies: 39
Views: 2,305
Posted By lr172
similar feelings here. I have installed custom...

similar feelings here. I have installed custom EFII systems in auto applications and love them. However, when I built the 540 for the 10, I chose mech FI and dual EI. I simply couldn't see how...
Forum: Autopilots Yesterday, 08:07 AM
Replies: 10
Views: 362
Posted By lr172
+1 The ability to quickly disconnect the AP is a...

+1

The ability to quickly disconnect the AP is a safety issue IMHO. Having it on the stick speeds the process, which I have had to use in traffic conflict situations.

another reason for one button...
Forum: RV Ongoing Maintenance Issues 02-22-2021, 09:11 AM
Replies: 7
Views: 371
Posted By lr172
It is a closed system and fluid level should...

It is a closed system and fluid level should remain constant, relative to the piston resting position. As mentioned, as pads wear, the piston rests further and further out and this movement must be...
Forum: RV General Discussion/News 02-22-2021, 08:57 AM
Replies: 48
Views: 2,986
Posted By lr172
I plan to attend. Larry

I plan to attend.

Larry
Forum: RV General Discussion/News 02-21-2021, 12:11 PM
Replies: 17
Views: 587
Posted By lr172
can't speak to issues with these screws, but I...

can't speak to issues with these screws, but I can say that lock washers don't always work in this situation. I chased an over voltage issue for several weeks until I finally found a loose...
Forum: Electronic Ignition Systems 02-20-2021, 01:07 PM
Replies: 12
Views: 508
Posted By lr172
Ok. We'll take your word for it. So, on a...

Ok. We'll take your word for it. So, on a simpler level, why are you using a plug that degrades in 25 hours. I and many others get hundreds of hours on a std plug. You are now looking at even...
Forum: Electronic Ignition Systems 02-20-2021, 10:38 AM
Replies: 12
Views: 508
Posted By lr172
iridium plugs should last 1000's of hours. I...

iridium plugs should last 1000's of hours. I have standard copper/nickel plugs and go hundreds of hours with similar performance. I highly doubt that a plug with 50 hours is impacting your ability...
Forum: RV-10 02-20-2021, 10:31 AM
Replies: 6
Views: 531
Posted By lr172
+1 I would much rather have 2 sheets of paper...

+1

I would much rather have 2 sheets of paper towel burn than all of that black foam. WAY less toxic. Also, if you are leaking fuel in there, I would suggest that your fire risk is much higher...
Forum: Autopilots 02-20-2021, 10:26 AM
Replies: 7
Views: 551
Posted By lr172
I agree with trying it without the auto trim to...

I agree with trying it without the auto trim to eliminate any issues on that system. On my 10 with G3X, I set up the AP with the recommended settings and found that I needed a good amount of change...
Forum: RV Ongoing Maintenance Issues 02-20-2021, 10:10 AM
Replies: 13
Views: 641
Posted By lr172
If the mag was 20 ATDC, it is possible that the...

If the mag was 20 ATDC, it is possible that the previous owner sgnificantly increased the advance on the light speed to make up for the essentially missing spark (20* retarded = might as well not be...
Forum: RV Ongoing Maintenance Issues 02-17-2021, 01:10 PM
Replies: 18
Views: 946
Posted By lr172
I thought the best practice was to check the...

I thought the best practice was to check the servo filter each annual. What if your rubber hoses, or something else, are breaking down and clogging up the screen. Not sure I'd want to figure that...
Forum: GPS 02-17-2021, 12:54 PM
Replies: 3
Views: 233
Posted By lr172
Check the paint TDS. Most metallic flake these...

Check the paint TDS. Most metallic flake these days is Mica. Definitely not a metal, though I cannot speculate on it's ability to pass GPS signals.
Forum: RV Building Tips/Techniques 02-16-2021, 07:56 AM
Replies: 7
Views: 505
Posted By lr172
same here. cleaned with laq thinner and scuffed...

same here. cleaned with laq thinner and scuffed aggressively and epoxy primer stuck just fine. Lots of plastic parts on cars these days. No issue for good primer with proper prep.
Forum: RV Building Tips/Techniques 02-15-2021, 08:26 AM
Replies: 31
Views: 3,429
Posted By lr172
seems no different than the guys who build RVs...

seems no different than the guys who build RVs and then sell them right after Phase I is done.
Forum: Tools 02-15-2021, 08:02 AM
Replies: 15
Views: 685
Posted By lr172
+1 You'll also want to use an air blower for...

+1

You'll also want to use an air blower for cleaning off debris on things and you don't want oily air getting on your parts.
Forum: RV Building Tips/Techniques 02-14-2021, 08:17 AM
Replies: 11
Views: 568
Posted By lr172
From what I remember, the countersinks were in...

From what I remember, the countersinks were in the fiberglass fairing. The angle of the flat head is fully consumed in the F/G part, so no need for dimpled skins.

I have done a few dimples with the...
Forum: RV Building Tips/Techniques 02-13-2021, 02:19 PM
Replies: 11
Views: 568
Posted By lr172
I used nut plates and had no major difficulty. I...

I used nut plates and had no major difficulty. I have been wrenching on things for decades, so have no issues "seeing" with my fingers. It seems I have bucked a LOT of rivets without visual help. ...
Forum: Painting your RV 02-13-2021, 09:04 AM
Replies: 6
Views: 468
Posted By lr172
I used SPI base and clear on my 10. I was a...

I used SPI base and clear on my 10. I was a simple two tone and able to get it all on in 24 hours. Can't speak to other mfr's but the owner of SPI told me that there are no adhesion issues if you...
Forum: Glass Cockpit 02-13-2021, 08:55 AM
Replies: 8
Views: 561
Posted By lr172
Yes you can. I did it with my 370's that had 5...

Yes you can. I did it with my 370's that had 5 hours on the hobbs when I got them. You have to press a couple buttons to do it, but I don't remember the particulars.

Larry
Forum: Glass Cockpit 02-12-2021, 08:40 AM
Replies: 8
Views: 367
Posted By lr172
Thanks for the info. This is interesting. I...

Thanks for the info. This is interesting. I have a 430W and a 23ES. I configured TIS-A when I set it up, but did not connect any Arinc ports on the 23, Just the 232 connection to the 24 and 232...
Forum: RV-10 02-11-2021, 08:19 AM
Replies: 19
Views: 2,796
Posted By lr172
While I followed this convention, I now think...

While I followed this convention, I now think that as long as the stick hits the panel AFTER achieving the minimum specified elevator throw, this should not be something that effects airworthiness. ...
Forum: Painting your RV 02-11-2021, 08:02 AM
Replies: 27
Views: 2,464
Posted By lr172
two planes painted at home and no alodine here. ...

two planes painted at home and no alodine here. I first scuff (maroon pad) with a water / dish soap solution until a break free condition then rinse (during the rinse phase you are check for ANY...
Forum: Glass Cockpit 02-11-2021, 07:51 AM
Replies: 19
Views: 945
Posted By lr172
And there you have it. I am pretty surprised...

And there you have it. I am pretty surprised that none of the 3 garmin techs asked if you had a 429 installed and showing a green check markfor it.

Larry
Forum: Glass Cockpit 02-10-2021, 10:29 PM
Replies: 8
Views: 367
Posted By lr172
Do you know which LRU. I have the 370's.

Do you know which LRU. I have the 370's.
Forum: Glass Cockpit 02-10-2021, 10:28 PM
Replies: 8
Views: 367
Posted By lr172
Thanks. 430W here, so no VNAV. I assume all...

Thanks.

430W here, so no VNAV. I assume all else worked well?

Larry
Forum: Glass Cockpit 02-10-2021, 10:22 PM
Replies: 26
Views: 2,022
Posted By lr172
WHen you press the AP button, the System should...

WHen you press the AP button, the System should go into pitch hold (tries to hold the current attitude) and therefore shouldn't be commanding elev movement. The face that the OPs servo rapidly goes...
Forum: Painting your RV 02-10-2021, 10:14 PM
Replies: 27
Views: 2,464
Posted By lr172
Given that this is being done by an auto shop,...

Given that this is being done by an auto shop, take all the parts to him in the phases he can deal with prior to final assembly. No brainer to spend $300 in trailer rental to save $15,000. You...
Forum: Glass Cockpit 02-10-2021, 09:28 AM
Replies: 8
Views: 367
Posted By lr172
G3X non-touch Upgrade

Garmin released a non-touch upgrade a few months ago. I would like to do the update, but there were several posts from folks that had problems and had to go back to the previous version. Are there...
Forum: RV-10 02-10-2021, 09:16 AM
Replies: 10
Views: 1,068
Posted By lr172
Some of this will depend upon how tight your door...

Some of this will depend upon how tight your door pin receptacles are. On my 10, the door pins are a close tolerance fit and they pull the door into a very specific position. I did my door gaps,...
Forum: RV General Discussion/News 02-10-2021, 09:10 AM
Replies: 21
Views: 1,753
Posted By lr172
I was referring to fuel efficiency. Well...

I was referring to fuel efficiency. Well designed exhaust will help pull more fuel into the cylinder. The extra power produced comes from additional fuel pulled into the cylinder. The extra power...
Forum: RV-9/9A 02-09-2021, 12:20 PM
Replies: 10
Views: 1,180
Posted By lr172
In my 10, I spent the first flight (2 hours)...

In my 10, I spent the first flight (2 hours) circling the airport at high speed and always within glide distance; shallow climb to keep CHTs in check. I landed fast, as I had not checked stall speed...
Forum: Traditional Aircraft Engines 02-09-2021, 09:31 AM
Replies: 23
Views: 964
Posted By lr172
All fair points. However, it should be noted...

All fair points. However, it should be noted that the K series is an angle valve engine with different characteristics than the typical parallel valve engine used on most 6 cyl RVs. Lycoming...
Forum: RV-10 02-09-2021, 09:03 AM
Replies: 6
Views: 319
Posted By lr172
The engine was cold before :10. Even so, 1&2...

The engine was cold before :10. Even so, 1&2 still show somewhat lower than the others in this time frame as the engine was coming up to temp. Plugs typically either fire or don't and problems with...
Forum: RV-10 02-08-2021, 08:28 PM
Replies: 6
Views: 319
Posted By lr172
Mags or EI? If 1 & 2 are only going lean during...

Mags or EI?

If 1 & 2 are only going lean during idle or very low RPM, as shown in graphic, intake leaks are a good place to start looking for trouble. Hard to see, as rpm and map aren’t shown on...
Forum: Traditional Aircraft Engines 02-08-2021, 12:21 PM
Replies: 23
Views: 964
Posted By lr172
If Lyc says best power is 21 GPH and you are...

If Lyc says best power is 21 GPH and you are flowing 23 GPH, why be worried? Lyc doesn't list a full rich fuel flow as it is not really relevant to anything. Designers may add a specific amount of...
Forum: RV General Discussion/News 02-08-2021, 08:28 AM
Replies: 21
Views: 1,753
Posted By lr172
Headers, or tuned length exhaust systems work on...

Headers, or tuned length exhaust systems work on the principle that cooling exhaust gas increases their velocity in the tube. If multiple tubes are interconnected, the pressure from this velocity...
Forum: Traditional Aircraft Engines 02-08-2021, 08:04 AM
Replies: 23
Views: 964
Posted By lr172
I suppose that is a fair point. However, those...

I suppose that is a fair point. However, those actively adapting their engines (assumed the OP was one of them) should understand that and have taken measures to ensure detonation risks are managed....
Forum: Traditional Aircraft Engines 02-07-2021, 01:55 PM
Replies: 23
Views: 964
Posted By lr172
Do you have .025 or .028 injector nozzles? I...

Do you have .025 or .028 injector nozzles? I have the former and see similar fuel flows and EGTs at those ambient temps. With the .025 nozzles, you will see a bit lower flow rates than other who...
Forum: RV-6/6A 02-06-2021, 10:36 AM
Replies: 4
Views: 541
Posted By lr172
I have flown lots in sub-zero (F) weather. No...

I have flown lots in sub-zero (F) weather. No need for air damns. Cyl temps stay well above the area of concern.

Larry
Forum: Traditional Aircraft Engines 02-06-2021, 10:26 AM
Replies: 28
Views: 1,325
Posted By lr172
Yes. The relationship between intake air temp...

Yes. The relationship between intake air temp and fuel required increases exponentially as temps drop. I did a custom FI map on a Porsche and was simply shocked at how much more fuel was required...
Forum: Traditional Aircraft Engines 02-05-2021, 09:53 AM
Replies: 5
Views: 762
Posted By lr172
+1 I made one for my 6 and used either 3/16 or...

+1

I made one for my 6 and used either 3/16 or 1/4" mild steel. The one that Van's supplied for my old ND without a boss, was 1/8", and I didn't feel it would be sturdy enough. I also welded...
Forum: Primers 02-04-2021, 09:57 AM
Replies: 8
Views: 903
Posted By lr172
PLenty of 2024 extruded parts on an RV.

PLenty of 2024 extruded parts on an RV.
Forum: RV General Discussion/News 02-04-2021, 09:49 AM
Replies: 10
Views: 811
Posted By lr172
All shipped. Still have a few left.

All shipped. Still have a few left.
Forum: RV Building Tips/Techniques 02-03-2021, 12:08 PM
Replies: 53
Views: 7,231
Posted By lr172
Good luck. Must have mis-read. Thought steve...

Good luck. Must have mis-read. Thought steve said he used cork, which is stable and doesn't shrink or crack over time, though has porosity issues that can be addressed with sealant. Can't speak to...
Forum: Electrical Systems 02-03-2021, 08:51 AM
Replies: 12
Views: 763
Posted By lr172
If you need to fab something, drop me a line. I...

If you need to fab something, drop me a line. I would be willing to fab a part to your specifications inexpensively. I have been doing more fabrication work in retirement. I made a custom bracket...
Forum: Traditional Aircraft Engines 02-03-2021, 08:34 AM
Replies: 15
Views: 694
Posted By lr172
As mentioned, you don't describe how you are...

As mentioned, you don't describe how you are leaning. If you are running mixture full rich at cruise altitude, your results are not overly surprising. My 6 with a 320 does 185 MPH TAS at 8K' on 8.1...
Forum: RV Building Tips/Techniques 02-03-2021, 08:26 AM
Replies: 53
Views: 7,231
Posted By lr172
I would re-think rubber. That will shrink and...

I would re-think rubber. That will shrink and ultimately crack and the sealant won't help. Scott and I used a more stable gasket material that will absorb the sealant and therefore works well...
Forum: Electrical Systems 02-02-2021, 07:18 AM
Replies: 17
Views: 1,683
Posted By lr172
Bigger is better in this regard, but technically...

Bigger is better in this regard, but technically the ground strap does not need to be any bigger than the starter feed, so 4 gauge in your case. You should be able to buy pre-made ground straps in...
Forum: RV Building Tips/Techniques 02-02-2021, 07:13 AM
Replies: 53
Views: 7,231
Posted By lr172
Take a piece of 1 X 1/8" steel and put a 90* bend...

Take a piece of 1 X 1/8" steel and put a 90* bend on it. Levave the long part about a foot (or whatever fits into the wing root gap) and the small part about an inch. Then grind a 1/2" long bevel...
Forum: RV-7/7A 02-02-2021, 07:06 AM
Replies: 5
Views: 399
Posted By lr172
Typically the play/slop comes from the weldment...

Typically the play/slop comes from the weldment not having a true round bore and therefore the interface between the bushing and the tubing ID have more clearance in some areas. Assiming the bushing...
Forum: RV General Discussion/News 02-02-2021, 06:59 AM
Replies: 5
Views: 328
Posted By lr172
I am in chicago and fly to Ames pretty often. ...

I am in chicago and fly to Ames pretty often. Happy to stop by on a trip. 6A, not 7 but they fly pretty much the same.

Larry
Forum: Electrical Systems 02-02-2021, 06:54 AM
Replies: 12
Views: 763
Posted By lr172
I had a bracket similar to the one on the right,...

I had a bracket similar to the one on the right, but it had one hole and one slot to accomodate variable spacing. I definately neeeded spacers to get the belt alignment correct, but was not really...
Forum: Traditional Aircraft Engines 02-02-2021, 06:49 AM
Replies: 18
Views: 2,757
Posted By lr172
Glad you came to a conclusion. I think this is...

Glad you came to a conclusion. I think this is one of the down sides of a field overhaul. If the case is sent to divco or other shop at o/h, they machine of a few thou off the case parting seam and...
Forum: Traditional Aircraft Engines 02-01-2021, 08:38 AM
Replies: 13
Views: 777
Posted By lr172
Do you have an CS of FP prop? On the 10, I set...

Do you have an CS of FP prop? On the 10, I set RPM for what is smooth. However, my 6 has an FP and I set it 100 or so lower than optimal. This helps me to slow down a bit on final approach. Down...
Forum: RV Building Tips/Techniques 02-01-2021, 08:35 AM
Replies: 35
Views: 4,116
Posted By lr172
I am sure the printer has a lot do with it, as...

I am sure the printer has a lot do with it, as does the quality of the transfer material. Mine seem quite sharp, even up close. I do get very tiny bubbles that appear, at the edges on a couple of...
Forum: Traditional Aircraft Engines 01-31-2021, 08:57 AM
Replies: 17
Views: 1,793
Posted By lr172
The nozzle is the main jet and it is the biggest...

The nozzle is the main jet and it is the biggest contributor to how the carb matches fuel flow to air flow through the venturi. I can't say whether that swap was an increase or decrease in the jet...
Forum: RV General Discussion/News 01-31-2021, 08:41 AM
Replies: 8
Views: 575
Posted By lr172
Likely a poor job. With proper prep and...

Likely a poor job. With proper prep and application, powder coating does a pretty good job of preventing rust. However, during prep, every bit of rust needs to be removed or chemically neutralized....
Forum: Traditional Aircraft Engines 01-31-2021, 08:33 AM
Replies: 7
Views: 412
Posted By lr172
Need to ask a chemist, but I would toss them. ...

Need to ask a chemist, but I would toss them. They are designed to be resistant to oil, but not sure they ever envisioned that the entire gasket would be coated with oil. I would be a bit concerned...
Forum: RV Building Tips/Techniques 01-31-2021, 08:16 AM
Replies: 35
Views: 4,116
Posted By lr172
I found some 8.5 x 11 sheets of the water slide...

I found some 8.5 x 11 sheets of the water slide material designed for laser printers. layed out everything in word, printed and applied. I then shot three coats of clear over it and blocked it down...
Forum: RV-10 01-31-2021, 08:06 AM
Replies: 19
Views: 1,330
Posted By lr172
I used a 10" piece of the trailing edge wedge...

I used a 10" piece of the trailing edge wedge material (rudder, elev, etc). Filled in the pre-drilled holes and painted. I secured it to the rudder with RTV/silicone. It is so small it isn't...
Forum: RV-10 01-30-2021, 08:32 AM
Replies: 16
Views: 1,374
Posted By lr172
I would expect a good portion of the cyl base...

I would expect a good portion of the cyl base issues on the ND, is from mechanics not honoring the radius clearance on the base plates or using the early plates without the reliefs cut into them, as...
Forum: RV-12/RV-12iS 01-29-2021, 12:28 PM
Replies: 9
Views: 899
Posted By lr172
Their all like this. SOmeone once said that they...

Their all like this. SOmeone once said that they are reamed after welding, but I don't believe it. The interiors are simple not round. They need to be using thicker stock and properly ream them...
Forum: RV-10 01-29-2021, 12:22 PM
Replies: 16
Views: 1,374
Posted By lr172
Same here. No real issues other than a bit of...

Same here. No real issues other than a bit of baffling work to make it fit.
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