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Search: Posts Made By: BobTurner
Forum: GPS Yesterday, 02:16 PM
Replies: 8
Views: 332
Posted By BobTurner
Good grief! The reference in post 2 is ‘approved’...

Good grief! The reference in post 2 is ‘approved’ by the German government, not the FAA!
92.205 requires you to use an ‘approved’ gps for ifr operations, and your op limits require you to follow...
Forum: RV Ongoing Maintenance Issues Yesterday, 01:56 PM
Replies: 6
Views: 174
Posted By BobTurner
So much misinformation!

1. Your altimeter displays indicated altitude. But your encoder sends pressure altitude to your transponder and adsb-out.
2. ATC computers know local altimeter settings, and re-convert pressure...
Forum: Autopilots 05-20-2022, 12:09 AM
Replies: 38
Views: 9,023
Posted By BobTurner
With the 4xxW series, Garmin will not send...

With the 4xxW series, Garmin will not send software updates to owners, only dealers. Dealers can set their own prices, but $100 or so seems typical. They stick a data card into one of your data card...
Forum: Autopilots 05-19-2022, 01:23 PM
Replies: 38
Views: 9,023
Posted By BobTurner
The reason I keep harping on software mis-match...

The reason I keep harping on software mis-match is that your symptoms (roller coaster ride) sound exactly like mine during my phase 1 testing, but only when using my GRT efis for control. Turned out...
Forum: Autopilots 05-19-2022, 11:02 AM
Replies: 38
Views: 9,023
Posted By BobTurner
These things are complicated, lots of...

These things are complicated, lots of possibilities.
1. Yes, it should fly in a wing leveler mode with no gps input. Try turning off the gps, see what happens.
2. Double check the wiring. ARINC A...
Forum: Autopilots 05-18-2022, 04:30 PM
Replies: 38
Views: 9,023
Posted By BobTurner
I would start by watching your 400W on boot-up,...

I would start by watching your 400W on boot-up, and copy down the software version(s) it is running. Send these numbers to Trio, and ask if they are compatible with your Pro. This sounds like a...
Forum: Autopilots 05-18-2022, 02:37 PM
Replies: 11
Views: 641
Posted By BobTurner
I vote for the Trio Pro. If you have electric...

I vote for the Trio Pro. If you have electric pitch trim the Trio will even handle that. Their servos use a slip clutch rather than the trouble prone shear screw in the TT. And when it’s disconnected...
Forum: Glass Cockpit 05-17-2022, 12:50 AM
Replies: 5
Views: 331
Posted By BobTurner
Uh, no. More like two orders of magnitude. And...

Uh, no. More like two orders of magnitude. And the transponder output is a short pulse, so the energy loss is pretty small. 10 orders of magnitude means ten billion.
Forum: RV-12/RV-12iS 05-16-2022, 07:30 PM
Replies: 28
Views: 2,951
Posted By BobTurner
So many problems…

Age, low total time, virtually zero time in type, faa data base doesn’t seem to know the current you, also non-standard engine.

At least you are not alone. I know a local pilot, 250 TT, 10 hr dual...
Forum: RV Ongoing Maintenance Issues 05-15-2022, 01:33 PM
Replies: 7
Views: 316
Posted By BobTurner
I cannot disagree more. Clearly, if the battery...

I cannot disagree more. Clearly, if the battery was to come loose and slide into the tailcone, the cg would change. It’s incumbent on the aircraft designer to come up with cg limits which are safe...
Forum: RV-4 05-15-2022, 01:07 PM
Replies: 10
Views: 769
Posted By BobTurner
By far, the most cost-effective approach is to...

By far, the most cost-effective approach is to wear foam ear plugs as well as your headphones. Turn up the radio/intercom volume as needed.
Forum: Electrical Systems 05-14-2022, 11:21 PM
Replies: 10
Views: 659
Posted By BobTurner
Since the FAA requests all transponders to run in...

Since the FAA requests all transponders to run in ALT mode all the time, that’s how it should be programmed to boot up. It’s in the manual.
Forum: RV Building Tips/Techniques 05-11-2022, 03:02 PM
Replies: 10
Views: 1,024
Posted By BobTurner
I have a couple with different size guide pins...

I have a couple with different size guide pins and they're great for fiberglass. I do prefer the ones with a "nipple", e.g., a steel guide pin (drill hole for screw, guide pin fits into hole and...
Forum: Glass Cockpit 05-10-2022, 11:21 AM
Replies: 14
Views: 1,675
Posted By BobTurner
Claude: I’m not at all certain about this, but I...

Claude: I’m not at all certain about this, but I *think* the one-button thing is specific to the GTN series (??). They have a ‘go-around’ function, which (1) continues to provide lateral guidance on...
Forum: Electrical Systems 05-09-2022, 08:06 PM
Replies: 11
Views: 570
Posted By BobTurner
But unfortunately the whole point is not to...

But unfortunately the whole point is not to minimize losses; it’s to eliminate ground loops, of any resistance.
Forum: Electrical Systems 05-09-2022, 07:02 PM
Replies: 11
Views: 570
Posted By BobTurner
Most avionics have their internal ground...

Most avionics have their internal ground connected to the metal box. To get a true single point ground you have to insulate the box from the metal panel. Possible, but a pain that most builders don’t...
Forum: RV-10 05-09-2022, 06:58 PM
Replies: 26
Views: 5,161
Posted By BobTurner
This is incorrect. Part 23 for certificated...

This is incorrect. Part 23 for certificated aircraft mandates CAS numbers (but allows a placard of IAS vs Altitude if one single CAS doesn’t work).
Forum: RV General Discussion/News 05-09-2022, 06:56 PM
Replies: 11
Views: 933
Posted By BobTurner
Here at LVK, it’s opposition from residents of...

Here at LVK, it’s opposition from residents of the town downwind of the runway. Used to be agriculture land, now it’s all housing. They equate more hangars with more noise.
Forum: RV-10 05-09-2022, 02:34 PM
Replies: 26
Views: 5,161
Posted By BobTurner
In point of fact this is exactly what the FARs...

In point of fact this is exactly what the FARs require for normally certified airplanes (but not EAB): If Vne cannot be stated as a single CAS number, then there must be a placard that states various...
Forum: RV-10 05-09-2022, 12:41 PM
Replies: 26
Views: 5,161
Posted By BobTurner
Exactly the problem! This document shows Vne as...

Exactly the problem! This document shows Vne as an indicated speed, with no reference to the elsewhere stated position that it should be a true airspeed.
Forum: RV Friends Who Have Passed On 05-08-2022, 06:36 PM
Replies: 16
Views: 4,512
Posted By BobTurner
The class B floor near the accident site is...

The class B floor near the accident site is 3000’. The 1600’ floor is a bit further south.
Forum: Electrical Systems 05-08-2022, 05:58 PM
Replies: 11
Views: 570
Posted By BobTurner
In principle your ground return wires should be...

In principle your ground return wires should be sized using the same chart as the power input: current carried before CB pops, and wire length. However, for most installations, a true single point...
Forum: RV-10 05-08-2022, 05:46 PM
Replies: 26
Views: 5,161
Posted By BobTurner
Uh, you mean, like zero? As others have...

Uh, you mean, like zero?

As others have indicated Vans official position - though not well publicized - is that Vne is given to us as a True Airspeed. Since this is different from normally...
Forum: Autopilots 05-06-2022, 04:33 PM
Replies: 9
Views: 519
Posted By BobTurner
Ground check

Put your 430W on the ‘satillite signal strength’ page (top, far right on the page matrix). Observe the bar heights. Turn on the various autopilot functions, watch for the bars to go down. If/when...
Forum: RV General Discussion/News 05-05-2022, 10:05 PM
Replies: 35
Views: 2,543
Posted By BobTurner
If you’re close enough to the transmitter a coat...

If you’re close enough to the transmitter a coat hangar will work. Yes, this should be adequate without the balun. If there’s a close by airport with an ILS, just park there in sight of the runway...
Forum: RV General Discussion/News 05-05-2022, 02:36 PM
Replies: 3
Views: 312
Posted By BobTurner
Note that if you use an airplane furnished by the...

Note that if you use an airplane furnished by the CFI, then he must also hold a different LODA (first issued circa 2008?). But worse, standard insurance policies do not cover giving instruction for...
Forum: RV General Discussion/News 05-04-2022, 09:37 PM
Replies: 28
Views: 2,164
Posted By BobTurner
True. But my quote says ‘at takeoff settings’....

True. But my quote says ‘at takeoff settings’. And the prior poster who I quoted said he leaned for best power for takeoffs.
Forum: Traditional Aircraft Engines 05-04-2022, 06:41 PM
Replies: 12
Views: 906
Posted By BobTurner
When you install the stud you should be...

When you install the stud you should be double-nutting it and torquing it to the same torque as you will use when you put a nut on it. It should not turn when you torque the nut on.
Forum: RV-8/8A 05-04-2022, 06:36 PM
Replies: 14
Views: 1,326
Posted By BobTurner
What's the function of the aluminum "pointer"...

What's the function of the aluminum "pointer" just forward of the stick?
Forum: Electronic Ignition Systems 05-04-2022, 02:48 PM
Replies: 20
Views: 1,569
Posted By BobTurner
Personally I think running a (long, in the -10)...

Personally I think running a (long, in the -10) unprotected wire the whole cabin length is not acceptable. But ymmv.
Forum: RV Ongoing Maintenance Issues 05-04-2022, 02:38 PM
Replies: 23
Views: 1,941
Posted By BobTurner
I think you got it backwards. Thinner air makes...

I think you got it backwards. Thinner air makes it easier for the spark to jump gaps, sometimes to the wrong place inside the mag, leading to high altitude mis-fire. Some turbo’d (high altitude)...
Forum: RV Building Tips/Techniques 05-03-2022, 06:31 PM
Replies: 11
Views: 944
Posted By BobTurner
It’s just like building an RV - one step at a...

It’s just like building an RV - one step at a time. Read thru all the paper instructions before starting.
Forum: Glass Cockpit 05-03-2022, 11:43 AM
Replies: 10
Views: 967
Posted By BobTurner
This is important enough that people should...

This is important enough that people should either talk to GarminExpert or RTFM. Now, my opinion, which I just said you should ignore, is that long term attitude stability requires either pitot data...
Forum: RV General Discussion/News 05-02-2022, 10:20 PM
Replies: 35
Views: 3,428
Posted By BobTurner
I use the Bogart tow bar method to secure all...

I use the Bogart tow bar method to secure all three axes. So far, so good. But I also carry a bungee cord that hooks to the end of the horizontal stabilizer, loops over the molding for the tail...
Forum: Electrical Systems 05-01-2022, 12:43 AM
Replies: 11
Views: 707
Posted By BobTurner
That is what you want. Remember to attach a...

That is what you want. Remember to attach a ground to one of the attach screws on the sender.
Forum: RV Ongoing Maintenance Issues 05-01-2022, 12:32 AM
Replies: 6
Views: 415
Posted By BobTurner
No, you need a straight one into two splitter....

No, you need a straight one into two splitter. Since both radios have internal diplexers ( which split out the vor/loc at about 110 MHz in one line, and the GS at 330 MHz in another) you need to feed...
Forum: ADS-B 04-30-2022, 01:04 PM
Replies: 24
Views: 3,068
Posted By BobTurner
So much confusion…

If your adsb fails enroute, just call ATC and request permission to proceed to your destination. See FAR 91.225.
If you are not equipped with mode C and ADSB-out, you are not restricted to just...
Forum: RV General Discussion/News 04-30-2022, 12:52 PM
Replies: 28
Views: 2,164
Posted By BobTurner
Most stock engines are in fact ‘de-powered by...

Most stock engines are in fact ‘de-powered by running too[sic] rich’ at takeoff settings. Leaning to best power at sea level can place them uncomfortably close to detonation limits.
Forum: RV General Discussion/News 04-29-2022, 11:57 AM
Replies: 28
Views: 2,164
Posted By BobTurner
I don’t understand how leaning results in higher...

I don’t understand how leaning results in higher fuel flows.
Engines are set up to be over rich at 100% sea level power for a reason.

I notice many posters define ‘efficiency’ as getting more power...
Forum: Engine Monitors 04-28-2022, 01:30 PM
Replies: 7
Views: 483
Posted By BobTurner
+1 on James’ post. I have this vague memory that...

+1 on James’ post. I have this vague memory that if this data had a 4 letter name (‘tach’) it was assigned to decimal arithmetic, but a 3 letter name (‘RPM’) was assigned to integer arithmetic. Sure...
Forum: RV General Discussion/News 04-28-2022, 01:18 PM
Replies: 28
Views: 2,164
Posted By BobTurner
I think some Mooneys had filter by-pass...

I think some Mooneys had filter by-pass knobs.
George, you’re asking the wrong question. If you could actually get the same power with or without ram air, then it wouldn’t make any difference. Of...
Forum: RV General Discussion/News 04-28-2022, 11:01 AM
Replies: 28
Views: 2,164
Posted By BobTurner
As you noted, ram air is useful at wide open...

As you noted, ram air is useful at wide open throttle altitudes (>8000’) to gain extra air which mixes with extra gas to gain more power, which lets you go a bit faster, but decreases mpg in most...
Forum: Electronic Ignition Systems 04-27-2022, 11:26 AM
Replies: 7
Views: 454
Posted By BobTurner
I do not know the answer to your question, but:...

I do not know the answer to your question, but: the Slick start (‘shower of sparks’) unit also boosts the input voltage to the mag (it is designed to be used without an impulse mag). It may be that...
Forum: RV-7/7A 04-25-2022, 09:37 PM
Replies: 4
CG
Views: 459
Posted By BobTurner
The EAA form asks you to come up with sample...

The EAA form asks you to come up with sample loadings that place the cg at forward, and again aft, limits. The idea is so you have a practical idea how easy, or hard, it is to exceed limits.
Forum: RV-14 04-25-2022, 07:25 PM
Replies: 10
Views: 657
Posted By BobTurner
It's an ancient device that, when for whatever...

It's an ancient device that, when for whatever reason, the gps goes out, will get you home.

I've actually had a GTN650 display a big red X over the screen when for some unknown reason it lost the...
Forum: RV Building Tips/Techniques 04-25-2022, 07:21 PM
Replies: 3
Views: 312
Posted By BobTurner
Yes, I used the recommend size drill for a hole...

Yes, I used the recommend size drill for a hole to be tapped. I just don't remember the screw size, off hand. Yes, then tap the hole. The screws are in shear, not a lot of thread required. I think I...
Forum: RV-14 04-25-2022, 07:18 PM
Replies: 10
Views: 657
Posted By BobTurner
Next time, have your ham friend show you the...

Next time, have your ham friend show you the trick to get two "pigtails" for the connections with no soldering. Basically, spread the braid with a small tool until, you have worked it to a hole in...
Forum: RV Building Tips/Techniques 04-24-2022, 02:30 PM
Replies: 13
Views: 815
Posted By BobTurner
The tough one is the thermostatically controlled...

The tough one is the thermostatically controlled pitot tube heater, since if it’s warm out the thermostat will keep it off. In flight in cold wx, the ‘current sensor’ noted earlier would work, but...
Forum: California 04-24-2022, 02:19 PM
Replies: 23
Views: 1,713
Posted By BobTurner
Just to clarify: the state charges a 9% sales or...

Just to clarify: the state charges a 9% sales or use tax upon purchase. If you are a builder, that tax is due the same tax year as when you purchase a part. No tax on your labor. The ‘annual’ tax is...
Forum: RV General Discussion/News 04-24-2022, 02:07 PM
Replies: 31
Views: 2,621
Posted By BobTurner
I tend to agree, but still, let me try one more...

I tend to agree, but still, let me try one more time:
Greg, ‘averages’ don’t really matter that much. If there is even a single accident involving for-hire operations in a standard category airplane,...
Forum: RV General Discussion/News 04-24-2022, 01:48 PM
Replies: 3
Views: 329
Posted By BobTurner
In my limited experience FSDO guys are generally...

In my limited experience FSDO guys are generally pleasant, and try, but sometimes are completely out of sync with FAA washington.
Forum: RV General Discussion/News 04-23-2022, 11:09 AM
Replies: 31
Views: 2,621
Posted By BobTurner
+1. (Scott’s post). There have been some kit-EAB...

+1. (Scott’s post). There have been some kit-EAB aircraft which, at least for a time, were virtually uninsurable, due to their accident record.
In addition, the FAA has always had to balance its...
Forum: RV-12/RV-12iS 04-22-2022, 10:28 PM
Replies: 24
Views: 2,275
Posted By BobTurner
Typo. As in his first sentence, VOR/LOC/GS

Typo. As in his first sentence, VOR/LOC/GS
Forum: Glass Cockpit 04-22-2022, 12:05 PM
Replies: 9
Views: 614
Posted By BobTurner
I have a panel-mounted SL-30 feeding a GRT Hx....

I have a panel-mounted SL-30 feeding a GRT Hx. IMHO the best nav-com ever made (Is there any other nav that can simultaneously feed both an ILS signal (main deviation needle on the HSI) and a VOR...
Forum: RV-12/RV-12iS 04-22-2022, 11:32 AM
Replies: 24
Views: 2,275
Posted By BobTurner
Biannual= twice a year Biennial = every two...

Biannual= twice a year
Biennial = every two years
I agree with what you posted, but the devil is in the details.
Pilot with FAA medical has a pacemaker installed, FAA now requires all sorts of...
Forum: RV-12/RV-12iS 04-21-2022, 07:05 PM
Replies: 24
Views: 2,275
Posted By BobTurner
When did people start thinking that a GPS was...

When did people start thinking that a GPS was required for ifr? Convenient, sure, but not necessarily required.
Forum: Instrument Flight Rules 04-21-2022, 06:41 PM
Replies: 21
Views: 2,421
Posted By BobTurner
(Sigh). When you said ‘FAA’ I’ll bet you meant...

(Sigh). When you said ‘FAA’ I’ll bet you meant ‘FSDO’. These guys seem to never talk with Washington. Ten years ago I asked OAK FSDO about a LODA for transition training. ‘Never heard of it, can’t be...
Forum: Traditional Aircraft Engines 04-20-2022, 06:41 PM
Replies: 10
Views: 1,339
Posted By BobTurner
It’s hard to tell in this photo, but is it...

It’s hard to tell in this photo, but is it possible the safety wire was originally backwards? We once had an O470 come out of a reasonably well respected engine shop with every single oil pan bolt on...
Forum: RV-7/7A 04-20-2022, 12:03 PM
Replies: 2
Views: 341
Posted By BobTurner
Only your insurance agent can answer your...

Only your insurance agent can answer your insurance question. But the call is free. Make sure you’re sitting down before getting the answer.
Either you or the cfi will need the one-year-old LODA for...
Forum: Electrical Systems 04-20-2022, 12:13 AM
Replies: 12
Views: 526
Posted By BobTurner
I don’t think this is correct. 3 steps (e.g., AWG...

I don’t think this is correct. 3 steps (e.g., AWG 16 to AWG 13) gives you a factor of two in cross-sectional area, hence half the resistance. So you need two AWG15 wires in parallel to equal one AWG...
Forum: RV-10 04-19-2022, 04:38 PM
Replies: 10
Views: 936
Posted By BobTurner
It is already a tight fit to get the seats onto...

It is already a tight fit to get the seats onto the rails - in the unmodified -10 you need to remove the cover at the foot of the aft seats, which covers the flap actuating torque tube. This gives...
Forum: Safety 04-18-2022, 10:06 PM
Replies: 41
Views: 4,419
Posted By BobTurner
+1. If the faa wants pilots to use standard...

+1. If the faa wants pilots to use standard phraseology, they should demand it from their controllers. Like several others, I’m based at a controlled field, and have never heard a ‘roger’ instead of...
Forum: Safety 04-18-2022, 01:54 PM
Replies: 41
Views: 4,419
Posted By BobTurner
More obscure trivia: The official FAA words are...

More obscure trivia: The official FAA words are now ‘Flight Review’, due every two years. Lots of pilots still use ‘BFR’ (it does have a nice ring to it) but apparently too many pilots spelled...
Forum: Safety 04-18-2022, 12:51 PM
Replies: 41
Views: 4,419
Posted By BobTurner
Yes they are the same. But ‘position and hold’...

Yes they are the same. But ‘position and hold’ was removed from the official lexicon something like a decade ago. Where have you been hearing this?
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