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Search: Posts Made By: lr172
Forum: RV Building Tips/Techniques Yesterday, 03:16 PM
Replies: 12
Views: 475
Posted By lr172
most of the fleet uses AN bolts for this...

most of the fleet uses AN bolts for this application and they have a tensile of 125K and shear of 75K.

There are numerous SS bolts the meet or exceed this strength, though some are less. Mcmaster...
Forum: Traditional Aircraft Engines Yesterday, 03:05 PM
Replies: 3
Views: 179
Posted By lr172
NO That provides an overflow path for the fuel...

NO

That provides an overflow path for the fuel if the internal diaphragm ruptures.
Forum: RV General Discussion/News Yesterday, 02:33 PM
Replies: 23
Views: 757
Posted By lr172
+1 Exercise caution here. Side effects are...

+1 Exercise caution here. Side effects are highly variable. None with my 1st injection, but 2nd was bad. Next morning I was so weak I couldn't get my socks on without assistance.
Forum: Glass Cockpit Yesterday, 07:24 AM
Replies: 15
Views: 514
Posted By lr172
You should stop looking at that raw data, as you...

You should stop looking at that raw data, as you have no idea what it is used for or what it is supposed to show on the ground. I doubt anyone but GRT knows what that data is and what it is used...
Forum: Traditional Aircraft Engines Yesterday, 07:12 AM
Replies: 5
Views: 266
Posted By lr172
The cap just sits on top of the end of the valve...

The cap just sits on top of the end of the valve stem. If you can see the the two valve retainer clips, the cap is not installed. When the cap is installed, it almost completely fills the OD of the...
Forum: Glass Cockpit Yesterday, 07:03 AM
Replies: 15
Views: 466
Posted By lr172
Mine is in the same spot with no issues. I...

Mine is in the same spot with no issues. I picked that area, as the that small piece of material is very rigid, with three supporting connections very close.

Larry
Forum: RV-10 Yesterday, 06:52 AM
Replies: 8
Views: 221
Posted By lr172
be cautious here. the starting and ending...

be cautious here. the starting and ending calibration values are going to be different for every plane as the builder does their own bending of the sending arm. This will create unique high and low...
Forum: Glass Cockpit 05-06-2021, 11:11 AM
Replies: 15
Views: 514
Posted By lr172
How did you confirm that the IAS is accurate? I...

How did you confirm that the IAS is accurate? I thought you had to convert to TAS nad compare to GS.

GRT has an offset for adding or subtracting from the TAS before presentation to the pilot. You...
Forum: RV Ongoing Maintenance Issues 05-06-2021, 11:03 AM
Replies: 17
Views: 655
Posted By lr172
+1 We called it varnish and is very common in...

+1

We called it varnish and is very common in lawnmower and other engines that are not used much. It usually is a darker yellow to tan color. I assume it is not the gas, but one of the additives....
Forum: RV-10 05-06-2021, 07:54 AM
Replies: 20
Views: 1,908
Posted By lr172
The numbers that I posted are pretty much the...

The numbers that I posted are pretty much the same when solo or full gross. I have done several trips at gross and it is very repeatable, though the GPH may be .1 or .2 higher but in the range.

I...
Forum: Reviews 05-06-2021, 06:44 AM
Replies: 2
Views: 399
Posted By lr172
I had a similar issue (found a broken ring) and...

I had a similar issue (found a broken ring) and received similar service. Sent me a whole new cyl assy. It took two weeks, as they had no stock and even sent the replacement overnight Sat delivery...
Forum: Traditional Aircraft Engines 05-06-2021, 06:37 AM
Replies: 14
Views: 827
Posted By lr172
You can remove the dam to bring down the #2 temps...

You can remove the dam to bring down the #2 temps in climb and accept a lower CHT in cruise, which may not really be much lower without it. You could also build a little box under the #2 inlet ramp...
Forum: RV-6/6A 05-05-2021, 11:03 AM
Replies: 19
Views: 911
Posted By lr172
All are on the Tipper skin and many are outside...

All are on the Tipper skin and many are outside of the windshield area, if I remember correctly. Some will also be under the fibergless transition work, though you can probably still get a lot of...
Forum: Glass Cockpit 05-04-2021, 11:03 AM
Replies: 10
Views: 472
Posted By lr172
I have two portrait screens. One PFD and the...

I have two portrait screens. One PFD and the other Map/engine. Similar to a side by side large screen. I also use a large Ipad with foreflight just right of the avionics stack. I really like...
Forum: RV Building Tips/Techniques 05-04-2021, 09:24 AM
Replies: 7
Views: 660
Posted By lr172
I thought most single part sealants need either...

I thought most single part sealants need either oxygen or moisture to cure. How would that happen in an air tight environment under a cap? I vaguely remember polysulphides requiring moisture to...
Forum: RV General Discussion/News 05-04-2021, 08:20 AM
Replies: 36
Views: 4,025
Posted By lr172
The clearances are small enough that simple...

The clearances are small enough that simple gravity with the right viscosity oil will not allow the pump to empty and require a prime. However, 80 PSI is a lot of force and while I obviously have...
Forum: RV General Discussion/News 05-04-2021, 08:11 AM
Replies: 36
Views: 4,025
Posted By lr172
They lyc has an over pressure releif...

They lyc has an over pressure releif valve/flapper that will open and allow that air into the system. And yes, 80 PSI, even through an .085 orifice will be enough to evacuate the oil from the...
Forum: RV General Discussion/News 05-04-2021, 07:49 AM
Replies: 36
Views: 4,025
Posted By lr172
Absolutely NO engine is assembled dry. Most use...

Absolutely NO engine is assembled dry. Most use a light assembly grease that is designed to last longer than traditional oil in order to deal with the harsh environment of running the engine for...
Forum: RV Ongoing Maintenance Issues 05-04-2021, 07:39 AM
Replies: 18
Views: 1,229
Posted By lr172
I have heard a few reports from folks that when a...

I have heard a few reports from folks that when a new AFP boost pump was first run after sitting for years that it would run high until they hit it or did something proactive to loosen the stuck...
Forum: Fuel Injection Systems 05-04-2021, 07:04 AM
Replies: 8
Views: 674
Posted By lr172
On the high CHT / low EGT on #1, assuming that...

On the high CHT / low EGT on #1, assuming that only low RPM operations are like this and high power is consistent with other cyl's, I would open the spider and check for debris in the four V shaped...
Forum: Safety 05-04-2021, 06:49 AM
Replies: 27
Views: 2,255
Posted By lr172
Sadly I remember the first time I bought a 2400...

Sadly I remember the first time I bought a 2400 baud modem and doubled the throughput. I often think that my kids should experience that type of device to realize how good they have it today.
Forum: RV-10 05-03-2021, 09:47 AM
Replies: 20
Views: 1,908
Posted By lr172
What are the pink cross hairs for? I have never...

What are the pink cross hairs for? I have never seen those on a G3X. I really miss the CDI cross hairs that the GRT has on my 6 and wonder if that is their role. Much easier to use than the std...
Forum: Electrical Systems 05-02-2021, 07:32 AM
Replies: 2
Views: 521
Posted By lr172
a very interesting study in organizational...

a very interesting study in organizational management. I suspect that the original design team was quite large and designed the two step drilling process for just this reason. Years later, a small...
Forum: Glass Cockpit 05-02-2021, 07:19 AM
Replies: 10
Views: 580
Posted By lr172
answers in line. Much of what you need is in the...

answers in line. Much of what you need is in the installation manual not the pilots guide.
Forum: RV-10 05-02-2021, 07:01 AM
Replies: 20
Views: 1,908
Posted By lr172
at 8000', I cruise at 165 KTAS on 10.5-10.8. ...

at 8000', I cruise at 165 KTAS on 10.5-10.8. Same speed at 14,000 is low 9's GPH.

Adjustable advance EI and tuned injectors.

Larry
Forum: RV-9/9A 05-02-2021, 06:57 AM
Replies: 5
Views: 328
Posted By lr172
can't really rule out carb ice, as prime...

can't really rule out carb ice, as prime conditions for it, but seems a bit unlikely that you would have enough ice to keep your throttle from moving, yet have no noticeable symptoms such as RPM drop...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 05-01-2021, 11:04 AM
Replies: 12
Views: 928
Posted By lr172
Same here. With the 6, just open the tipper for...

Same here. With the 6, just open the tipper for 15 seconds and it clears. With the 10, I did defrost, as opening the doors is harder and produces less airlow in the cabin. Doesn't work near as...
Forum: Alternative Engines 05-01-2021, 10:58 AM
Replies: 28
Views: 4,096
Posted By lr172
The same reason that you would want a pmag that...

The same reason that you would want a pmag that generates it's own power. If you have to shut off the master due to a fire or your earthx decides to shut itself down as they sometimes do, you want...
Forum: RV-14 05-01-2021, 08:33 AM
Replies: 18
Views: 1,595
Posted By lr172
I do it for better starting performance. When...

I do it for better starting performance. When you hit the starter, bus voltage drops to 10 or lower. This causes the alternator to go to max output. First, it will draw close to 5 amps on the...
Forum: Engine Monitors 05-01-2021, 07:51 AM
Replies: 8
Views: 369
Posted By lr172
The VDO is a resistive sensor and the Kavlico is...

The VDO is a resistive sensor and the Kavlico is a transducer. Swapping will require some wiring work as well, as the transducer requires a 5V power source.
Forum: RV General Discussion/News 05-01-2021, 07:46 AM
Replies: 2
Views: 252
Posted By lr172
If you have FI, there is a pressure take off port...

If you have FI, there is a pressure take off port on the servo that some use. That is where I take it off. In the certified world many use a tee at the carb, so wouldn't be surprised to see it...
Forum: Glass Cockpit 05-01-2021, 07:24 AM
Replies: 10
Views: 469
Posted By lr172
You are taking pressure readings at a point VERY...

You are taking pressure readings at a point VERY close to an intake valve, not in a plenum like on you car. This can introduce reverse flow coditions and cause oscillations. For many, a restrictor...
Forum: Electrical Systems 04-30-2021, 11:05 AM
Replies: 55
Views: 6,548
Posted By lr172
If I had 2 pmags, I would consider some form of...

If I had 2 pmags, I would consider some form of b/u power. A scenario to consider: Elec issue causes the need to disconnect master, battery dies, etc. Pilot on final pulls power back to idle and...
Forum: RV General Discussion/News 04-30-2021, 07:33 AM
Replies: 36
Views: 4,025
Posted By lr172
Most good mechanics take extra measures to...

Most good mechanics take extra measures to pre-oil a new engine before it's first start, as they have learned that significant wear can happen when you start an engine that has been purged of oil. ...
Forum: Electrical Systems 04-29-2021, 01:48 PM
Replies: 31
Views: 1,205
Posted By lr172
Traditional ground straps often have steel...

Traditional ground straps often have steel terminals instead of copper to allow this type of connection.
Forum: Electrical Systems 04-29-2021, 10:54 AM
Replies: 31
Views: 1,205
Posted By lr172
Starters don't have a provision for connecting a...

Starters don't have a provision for connecting a ground cable, as the industry standard (auto AND aircraft) is to ground on the engine block and the starter's contact with the block is the ground...
Forum: Traditional Aircraft Engines 04-29-2021, 10:27 AM
Replies: 36
Views: 11,572
Posted By lr172
Not sure how you are interpreting this, but by my...

Not sure how you are interpreting this, but by my read Lyc clearly approves 93 octane auto fuel in the 540 C/D models, and most other 320/360 PV variants, as long as the vapor rating is A-4 (7-9.3...
Forum: Electronic Ignition Systems 04-29-2021, 07:38 AM
Replies: 19
Views: 1,328
Posted By lr172
The point is that the Cores on the MSD wires are...

The point is that the Cores on the MSD wires are superior in quality. They are designed to take the 90* bends at the terminal and history has shown that they do not fail the way that your inferior...
Forum: RV-10 04-29-2021, 07:24 AM
Replies: 12
Views: 1,407
Posted By lr172
The big issue with the adhesive based material is...

The big issue with the adhesive based material is that the plexi bleeds air, albeit very slowly. This will cause the tint material to develop air bubbles under it. Madico made a special...
Forum: RV-10 04-29-2021, 07:21 AM
Replies: 12
Views: 1,407
Posted By lr172
What is the "Kinder version?" Was this good...

What is the "Kinder version?" Was this good enough for the front windows? Would enjoy learning of better options.

Larry
Forum: Electronic Ignition Systems 04-28-2021, 11:56 AM
Replies: 19
Views: 1,328
Posted By lr172
That is a chevy SB/BB kit. Definately check the...

That is a chevy SB/BB kit. Definately check the fit on the Pmag. I thought the pmag used Ford EDIS coils and not sure the Chevy style coil connectors will fit properly. I thought the EDIS coils...
Forum: RV Ongoing Maintenance Issues 04-28-2021, 11:19 AM
Replies: 28
Views: 54,825
Posted By lr172
Pretty sure there is no requirement for the...

Pretty sure there is no requirement for the timing and use of flights in between inspection phases during inspection, as long as the inspection is done with log book entries BEFORE the expiration of...
Forum: RV General Discussion/News 04-28-2021, 08:52 AM
Replies: 22
Views: 1,611
Posted By lr172
While this approach will work well for...

While this approach will work well for traditional ground power, jumping applications, it may not work with modern automotive style battery chargers (microprocessor based vs old school transformer...
Forum: RV Ongoing Maintenance Issues 04-28-2021, 08:08 AM
Replies: 17
Views: 1,562
Posted By lr172
3/32 is a lot for hinge alignment and certain to...

3/32 is a lot for hinge alignment and certain to cause an issue. You want to measure the gaps at all four hinges and strive for consistency. Both high AND low cause problems/imbalance. You want...
Forum: RV General Discussion/News 04-28-2021, 07:52 AM
Replies: 22
Views: 1,611
Posted By lr172
That is what I did on my planes. 14 ga wire...

That is what I did on my planes. 14 ga wire directly to the battery, through a 15A fuse and to a female connector that shields the hot pin from accidental shorting to ground. Mine are well...
Forum: Traditional Aircraft Engines 04-27-2021, 01:41 PM
Replies: 12
Views: 509
Posted By lr172
There is always an easier way. As mentioned, no...

There is always an easier way. As mentioned, no need to replace the baffling; Just fix it. Might take a couple of days and you'll learn a lot about your engine. You could always pull the power...
Forum: RV General Discussion/News 04-27-2021, 11:04 AM
Replies: 29
Views: 1,756
Posted By lr172
Not an expert, but I am guessing that they barely...

Not an expert, but I am guessing that they barely fit into the 1/4" tubing, so the bent wire inserts create more than enough blockage to keep them out. I believe a mud dauber is about the size of a...
Forum: ADS-B 04-27-2021, 10:54 AM
Replies: 11
Views: 891
Posted By lr172
serial connection is better and safer. with...

serial connection is better and safer. with serial, altitude data is constantly sent from transponder to ADSB unit for re-transmission. With sniffer, data is only captured / sniffed when the...
Forum: Traditional Aircraft Engines 04-27-2021, 08:14 AM
Replies: 12
Views: 509
Posted By lr172
IMHO cowl flaps are a bandaid for this. I would...

IMHO cowl flaps are a bandaid for this. I would start with baffling quality and sealing up open areas. Many goods posts here on that subject. Whole lot of folks with 360's that can climb at 120...
Forum: Glass Cockpit 04-27-2021, 08:02 AM
Replies: 5
Views: 282
Posted By lr172
Make sure you test it. That is NOT what they...

Make sure you test it. That is NOT what they told me when I called. Also not what the manual says. More than moderately suspicious. This would not be the first time that someone was given bad...
Forum: Painting your RV 04-27-2021, 06:58 AM
Replies: 10
Views: 366
Posted By lr172
First, 400 grit won't address an adhesion...

First, 400 grit won't address an adhesion problem. I would put tape all over those surfaces and see what else pulls off. If the adhesion is truly poor, you're going to have large chunks of paint...
Forum: RV General Discussion/News 04-26-2021, 09:40 PM
Replies: 29
Views: 1,756
Posted By lr172
My big fear is mud daubers. I learned a neat...

My big fear is mud daubers. I learned a neat trick. I used a bent paperclip inserted into the opening of the sawed off AN fitting. They are still there 800 hours later and it reduces the space...
Forum: Glass Cockpit 04-26-2021, 12:19 PM
Replies: 5
Views: 282
Posted By lr172
The artex 345 can only be configured at the...

The artex 345 can only be configured at the factory for either NMEA 4800 or aviation 9600. Have you confirmed which yours is? The units sent to ACS are typically configured for aviation 9600. Some...
Forum: RV General Discussion/News 04-26-2021, 09:16 AM
Replies: 53
Views: 5,158
Posted By lr172
While this may be true, bone stock Chevy V6 and...

While this may be true, bone stock Chevy V6 and V8 engines have been used in boats for decades. In those cases, the engines spend the vast majority of their time at peak torque RPMs (4500 typically)...
Forum: RV-10 04-26-2021, 07:58 AM
Replies: 3
Views: 485
Posted By lr172
Yes. this is called wasted spark and is very...

Yes. this is called wasted spark and is very common on aftermarket ignition systems. No negative consequence with firing a plug while the cylinder is on the exh stroke. It is also true that single...
Forum: Electrical Systems 04-26-2021, 07:39 AM
Replies: 19
Views: 1,719
Posted By lr172
My intercom wiring looks just like the pic from...

My intercom wiring looks just like the pic from 94KB. Simple and effective. Daisy chain seems overly complicated to me and creates potential issues down the road if you need to dig into the harness...
Forum: RV-4 04-26-2021, 07:31 AM
Replies: 9
Views: 1,010
Posted By lr172
The o-ring sizes are standard and listed on the...

The o-ring sizes are standard and listed on the picture posted above.
Forum: VAF Classifieds (posts in here deleted after 30 days) 04-26-2021, 07:22 AM
Replies: 6
Views: 780
Posted By lr172
Do you know what thicknesses are included with...

Do you know what thicknesses are included with the SS shim stock?
Forum: Electronic Ignition Systems 04-25-2021, 09:52 AM
Replies: 19
Views: 1,328
Posted By lr172
Just by an MSD or Taylor custom length kit (4,6...

Just by an MSD or Taylor custom length kit (4,6 or 8 wires) and it comes with everything you need to make the cables, including a crimping die. You can select the angles on the plug end (straight,...
Forum: RV General Discussion/News 04-25-2021, 09:41 AM
Replies: 22
Views: 1,611
Posted By lr172
I shy away from jumping, as you will launch with...

I shy away from jumping, as you will launch with a low battery charge. A no no for an electrically dependent aircraft. Like Carl, I have a 15A fused connector for a pigtail that I can attach to a...
Forum: Safety 04-25-2021, 08:27 AM
Replies: 20
Views: 2,286
Posted By lr172
That is just scary. It is really a shame that as...

That is just scary. It is really a shame that as an industry, we do not train pilots to understand the basics that are required to execute a safe flight. I personally believe that we should not...
Forum: RV-10 04-25-2021, 08:15 AM
Replies: 6
Views: 539
Posted By lr172
Same here. In climb, the 10 doesn't need a lot...

Same here. In climb, the 10 doesn't need a lot of rudder and the force to hold it neutral in a climb is much lighter than the 6 surprisingly. I don't miss having an adjustable rudder trim.
Forum: Electronic Ignition Systems 04-25-2021, 08:13 AM
Replies: 19
Views: 1,328
Posted By lr172
I don't know, but I have seen Dan mention that...

I don't know, but I have seen Dan mention that the Pmag uses the Ford EDIS coil pack.
Forum: VAF Classifieds (posts in here deleted after 30 days) 04-25-2021, 07:20 AM
Replies: 6
Views: 500
Posted By lr172
I did this on my 6 two years ago. First, this is...

I did this on my 6 two years ago. First, this is caused by incorrect shimming. Those bearing can't handle very much axial load and the attachment MUST be properly shimmed to avoid abnormal wear. I...
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