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Search: Posts Made By: rmartingt
Forum: RV-14 02-19-2020, 10:37 AM
Replies: 14
Views: 2,303
Posted By rmartingt
I’m glad I read this thread... was getting ready...

I’m glad I read this thread... was getting ready to order some engine mounts. Guess I’ll find them somewhere else......
Forum: Traditional Aircraft Engines 02-17-2020, 03:28 PM
Replies: 4
Views: 1,563
Posted By rmartingt
From an email to Superior's customer...

From an email to Superior's customer service:

"The part number is SL73161 along with a gasket on each side of it and that part number is SL66224. The spacer is .250 inches thick."

Spruce has it...
Forum: Traditional Aircraft Engines 02-12-2020, 02:57 PM
Replies: 7
Views: 307
Posted By rmartingt
I like that idea and I have the equipment... I'll...

I like that idea and I have the equipment... I'll just need to make a few test pieces to get my welding up to snuff! I'd imagine I could get a few out of just a foot or two of angle.
Forum: Traditional Aircraft Engines 02-12-2020, 05:52 AM
Replies: 7
Views: 307
Posted By rmartingt
Alternator bracket for 2.25” lug?

I’m using a Denso automotive alternator as my primary and it has a 2.25” main mounting lug (I believe this is the “large” Denso frame?). Anyone know what the right mounting bracket is for this? Or...
Forum: RV General Discussion/News 02-09-2020, 11:45 AM
Replies: 11
Views: 1,171
Posted By rmartingt
Yep. Same anywhere else in the industry; we bash...

Yep. Same anywhere else in the industry; we bash our heads against Major vs. Minor all the time. And most places (in my experience) tend to the side of caution/CYA and assume it's Major if there's...
Forum: Fuel Injection Systems 02-04-2020, 05:47 PM
Replies: 1
Views: 299
Posted By rmartingt
SDS users - where are you mounting your ECU?

Starting to look at mounting/installation options for my ECU now that I have the system in hand and wondering where others (especially 6/7/9 builders) are putting their ECUs. One thing I’m...
Forum: RV General Discussion/News 01-31-2020, 04:34 AM
Replies: 47
Views: 2,937
Posted By rmartingt
I'm looking into LLC registration, but only as a...

I'm looking into LLC registration, but only as a way of obfuscating ownership information on places like Flightaware. I really don't like that any fool with an internet connection can look up tail...
Forum: RV General Discussion/News 01-18-2020, 12:15 PM
Replies: 11
Views: 1,332
Posted By rmartingt
I'm having trouble understanding how hanging the...

I'm having trouble understanding how hanging the engine on the mount, and supporting at the main wing spar, will somehow "crease" the lower skins. In flight the weight of the engine and prop (at up...
Forum: RV models of the future (RV-??) 01-18-2020, 12:01 PM
Replies: 74
Views: 15,960
Posted By rmartingt
I never said they did that. I said they insist...

I never said they did that. I said they insist on supervising this stuff--approving procedures, being notified of any/all changes, etc.

For example:
21.135 says you have to provide the FAA a...
Forum: RV General Discussion/News 01-17-2020, 03:38 PM
Replies: 11
Views: 1,332
Posted By rmartingt
As things sit now, the top of the firewall is at...

As things sit now, the top of the firewall is at sternum level. I can stand next to the fuselage and rest my hand on the cockpit rails/longerons. It made rigging the wings really easy (other than...
Forum: RV General Discussion/News 01-17-2020, 11:09 AM
Replies: 11
Views: 1,332
Posted By rmartingt
Thanks Ralph! I definitely hadn't thought about...

Thanks Ralph! I definitely hadn't thought about moving the second battery aft but that's at least an idea. We'll see if I can make it work up front, though.

Things look easier on a nosewheel...
Forum: RV models of the future (RV-??) 01-17-2020, 09:55 AM
Replies: 74
Views: 15,960
Posted By rmartingt
I'd bet Van's would collectively run away...

I'd bet Van's would collectively run away screaming at the mere thought of trying to certify to Part 23. The paperwork and bureaucratic headaches would be staggering (and likely bankrupting). And...
Forum: RV General Discussion/News 01-17-2020, 09:29 AM
Replies: 11
Views: 1,332
Posted By rmartingt
That's pretty much exactly the plan; I was just...

That's pretty much exactly the plan; I was just trying to forestall "just do the engine stuff at the end, it goes quick" when I have a non-standard install and a very slow build pace.

My main...
Forum: RV General Discussion/News 01-17-2020, 08:26 AM
Replies: 11
Views: 1,332
Posted By rmartingt
<SNIP> I have the same question and there was...

<SNIP> I have the same question and there was never a response...

Due to my non-standard configuration (dual battery, dual alt, EFI) the plans placement of firewall-mounted items like batteries and...
Forum: Traditional Aircraft Engines 01-16-2020, 02:42 PM
Replies: 5
Views: 722
Posted By rmartingt
I'm in the process of doing that right now. ...

I'm in the process of doing that right now. Started with an inspected and tagged core and went from there. Just a few more stock parts and the SDS system to order, and we'll be ready to build. A...
Forum: RV Ongoing Maintenance Issues 01-14-2020, 11:00 AM
Replies: 65
Views: 5,851
Posted By rmartingt
Based on the above, does anyone see a need for a...

Based on the above, does anyone see a need for a sniffle valve on an EFI engine? I would expect fuel leakage to be minimal on shutdown, especially if it's done by killing the pump or ECU power.
Forum: Glass Cockpit 01-12-2020, 08:51 AM
Replies: 30
Poll: EFIS Poll
Views: 2,593
Posted By rmartingt
I'm curious about the "other brand and not...

I'm curious about the "other brand and not satisfied"... which brand(s) and why?
Forum: RV-9/9A 01-11-2020, 02:27 PM
Replies: 43
Views: 4,714
Posted By rmartingt
A couple of things to consider... A/C is heavy...

A couple of things to consider... A/C is heavy and takes a lot of power for something you're only using at low altitude. I've traveled with Dad in his RV-6 in the middle of summer and he lives near...
Forum: RV-7/7A 01-05-2020, 08:40 PM
Replies: 13
Views: 1,444
Posted By rmartingt
No, you can't install 9 wings on a 7, or...

No, you can't install 9 wings on a 7, or vice-versa.

One option might be swappable wing tips on a 7. Properly engineered, they could provide cruise benefits on long flights yet be swapped out for...
Forum: COMM 01-05-2020, 03:54 AM
Replies: 11
Views: 1,220
Posted By rmartingt
I've been looking into something similar, though...

I've been looking into something similar, though my plan was to run Com 1 off the stick and Com 2 off the throttle.

The trick isn't the switch--any (on)-off-(on) switch can do the job--but rather...
Forum: ADS-B 01-04-2020, 11:17 AM
Replies: 11
Views: 1,252
Posted By rmartingt
It would work just as well if, when "anonymous...

It would work just as well if, when "anonymous mode" was selected, it generated a random "tail number" like VFR2Q8ZP or VFR868248 or something like that. 978 ADS-B already does this. From an...
Forum: RV models of the future (RV-??) 01-03-2020, 04:40 PM
Replies: 36
Views: 6,900
Posted By rmartingt
And roadable, with folding wings...

And roadable, with folding wings...
Forum: ADS-B 01-03-2020, 11:04 AM
Replies: 11
Views: 1,252
Posted By rmartingt
My understanding is that 1090ES always broadcasts...

My understanding is that 1090ES always broadcasts N-number because the specifications for Mode S transponders, and the international agreements on their use, require the registration to be broadcast...
Forum: ADS-B 01-03-2020, 09:21 AM
Replies: 26
Views: 2,541
Posted By rmartingt
There are a lot of things regarding ADS-B and its...

There are a lot of things regarding ADS-B and its implementation that the FAA doesn't seem to have thought through or considered.

- Operator privacy
- Formation flight
- Aircraft with...
Forum: Fuel Injection Systems 12-27-2019, 05:26 AM
Replies: 57
Views: 3,947
Posted By rmartingt
Seems like one would want to size a LiFePo...

Seems like one would want to size a LiFePo battery not by a single lead-acid-equivalent AH rating, but by using data from the manufacturer (or your own testing) of voltage vs. time based on discharge...
Forum: My RV Build Project 12-24-2019, 11:18 AM
Replies: 29
Views: 2,833
Posted By rmartingt
https://www.garagejournal.com/forum/showthread.php...

https://www.garagejournal.com/forum/showthread.php?t=284191

I recommend:

INSULATION!
Mini split AC
Wire in a 240 outlet or two
White walls for better lighting
2x6 framing if stick built
Forum: Traditional Aircraft Engines 12-20-2019, 07:49 PM
Replies: 17
Views: 1,737
Posted By rmartingt
An old thread on this just surfaced a few weeks...

An old thread on this just surfaced a few weeks ago: http://www.vansairforce.com/community/showthread.php?t=86912
Forum: ADS-B 12-18-2019, 12:49 PM
Replies: 75
Views: 7,306
Posted By rmartingt
As much of a problem of ADS-B data being public...

As much of a problem of ADS-B data being public is that it's linked to open, publicly-accessible registration databases. Any fool with an internet connection can look up an airplane, see who owns it...
Forum: Autopilots 12-13-2019, 10:56 AM
Replies: 28
Views: 4,678
Posted By rmartingt
I've been thinking about doing the same thing...

I've been thinking about doing the same thing with Dynon knob and button panels, albeit in a slider. My main concern is over how far they'd stick out, and how much of the view would be blocked. ...
Forum: RV General Discussion/News 12-13-2019, 05:50 AM
Replies: 19
Views: 1,260
Posted By rmartingt
First, forget about putting a deadline on...

First, forget about putting a deadline on yourself. However long you think it'll take, double that. We thought Dad's RV-6 would take 2-3 years; it took about 6. I thought my -7 would take about 5...
Forum: RV General Discussion/News 12-13-2019, 04:17 AM
Replies: 8
Views: 815
Posted By rmartingt
Yes, see if you can go pick it up. It may even...

Yes, see if you can go pick it up. It may even be better than a residential delivery--they've put my kits right in the back of my truck and I could back it up to my shop and unload right there,...
Forum: RV General Discussion/News 12-06-2019, 10:05 AM
Replies: 10
Views: 3,071
Posted By rmartingt
Are there any other pictures? All I see is one ...

Are there any other pictures? All I see is one overview shot of the airplane.
Forum: Electrical Systems 11-21-2019, 01:44 PM
Replies: 145
Views: 16,739
Posted By rmartingt
Here’s a question then... since it seems auto...

Here’s a question then... since it seems auto alternators are generally a viable solution for belt-driven applications... what about accessory pad alternators? Are there automotive alternatives or...
Forum: RV General Discussion/News 11-21-2019, 05:51 AM
Replies: 27
Views: 2,624
Posted By rmartingt
Well, one other way to solve the issue is to fly...

Well, one other way to solve the issue is to fly from a non-towered field and never use ATC services. Then there’s no need to notify anyone of the “experimental nature”, right? :D;)
Forum: Job Board 11-15-2019, 03:34 PM
Replies: 35
Views: 4,418
Posted By rmartingt
I've heard this as well, from guys much closer to...

I've heard this as well, from guys much closer to my age. And it's not just engineering--my wife was turned down for a job that she had previous experience in, in favor of a fresh college grad,...
Forum: RV-14 11-15-2019, 04:44 AM
Replies: 10
Views: 1,353
Posted By rmartingt
Read through these three...

Read through these three...
Forum: Electrical Systems 11-14-2019, 02:58 PM
Replies: 0
Views: 261
Posted By rmartingt
Placement of contactors (dual batt/dual alt)

I'm starting to lay things out with tape on the firewall and I've gotten to battery/alternator placement.

I haven't found many examples of dual battery installations on taildraggers (it's important...
Forum: ADS-B 11-09-2019, 07:25 AM
Replies: 75
Views: 7,306
Posted By rmartingt
Precisely. I asked the FAA about this years ago....

Precisely.

I asked the FAA about this years ago. Their complete response, misspelling and all, was "Are databases are public for safety."

:rolleyes:
Forum: Job Board 11-07-2019, 08:10 AM
Replies: 35
Views: 4,418
Posted By rmartingt
At least in my experience, it seems most...

At least in my experience, it seems most brand-new AEs see MRO/in-service work as sort of beneath them--they're all about designing the next new shiny thing and changing the world or somesuch.

I...
Forum: International 11-04-2019, 03:57 PM
Replies: 7
Views: 761
Posted By rmartingt
It doesn't help any, but I'm pretty sure I goofed...

It doesn't help any, but I'm pretty sure I goofed up the same part a different way and the only company that carried that size angle at a reasonable price was Van's. But I also didn't have the...
Forum: Traditional Aircraft Engines 10-30-2019, 10:29 AM
Replies: 34
Views: 8,838
Posted By rmartingt
Yes, I'm very interested in this as well

Yes, I'm very interested in this as well
Forum: RV-7/7A 10-25-2019, 03:30 AM
Replies: 14
Views: 1,886
Posted By rmartingt
https://lh3.googleusercontent.com/3_PSHhkugacxWCda...

https://lh3.googleusercontent.com/3_PSHhkugacxWCda7m7ihisG2x88Nr_zT2i9R958OHVRpv8gmfyqxDRiP9OvMfbuJcHSKBWiFbCDez0lxY7IposxD_3wtHYj--8IB9ZvBjakahp-A0kVpSQjN8SgimkYvmyrDxdyuYh2zVqC7WqiUEPx00h3sKc7dg_zfl...
Forum: RV-7/7A 10-18-2019, 07:08 PM
Replies: 14
Views: 1,886
Posted By rmartingt
That'll come when I get to the 3D stage. Right...

That'll come when I get to the 3D stage. Right now I'm just playing with layouts till I get something I'm ready to put the time into modeling in 3D. But I'm thinking about it, at least...


I'll do...
Forum: RV-7/7A 10-17-2019, 11:00 AM
Replies: 14
Views: 1,886
Posted By rmartingt
All engine-related switches would be of a locking...

All engine-related switches would be of a locking type (pull the lever out to go over the detent) to deal with the accidental deactivation issue. With the mixture knob I'm envisioning a guard around...
Forum: RV-7/7A 10-17-2019, 08:44 AM
Replies: 14
Views: 1,886
Posted By rmartingt
Panel concept review (very rough draft) try 2

Reposting from a previous attempt, hopefully with working pictures this time:

Although I'm probably a year to a year and a half from really needing to have it set in stone, I figured I probably need...
Forum: RV-12/RV-12iS 10-14-2019, 10:47 AM
Replies: 9
Views: 1,204
Posted By rmartingt
And even building E-AB, the requirement is only...

And even building E-AB, the requirement is only that at least 51% of the work be done by “amateurs”, i.e. people not being paid to do the work.

It does not mean that one person must do at least 51%...
Forum: RV General Discussion/News 10-09-2019, 03:17 PM
Replies: 36
Views: 4,470
Posted By rmartingt
I fit mine to do control and fuel installation,...

I fit mine to do control and fuel installation, then removed them. I want todo as much work as possible at home before going to the airport because the nearest realistic option is 45 minutes...
Forum: Glass Cockpit 10-06-2019, 04:10 AM
Replies: 41
Views: 9,845
Posted By rmartingt
Got a link? I can't find them anywhere on the...

Got a link? I can't find them anywhere on the site...
Forum: RV General Discussion/News 10-05-2019, 12:40 PM
Replies: 25
Views: 14,447
Posted By rmartingt
You divide (displacement x RPM) by two because...

You divide (displacement x RPM) by two because half the time the pistons are stroking out that displacement, you aren't taking air in (on a four-stroke).
Forum: RV General Discussion/News 10-01-2019, 10:11 AM
Replies: 22
Views: 2,801
Posted By rmartingt
Of course, a week after I finish installing my...

Of course, a week after I finish installing my own homebrew ADAHRS mount...


;)
Forum: RV-12/RV-12iS 09-29-2019, 03:17 PM
Replies: 10
Views: 2,439
Posted By rmartingt
Some airplanes have a surprising amount of...

Some airplanes have a surprising amount of "growth margin" built in; others can often handle such growth with minimal modification. However I suspect the RV-12 (and most other purpose-designed LSAs...
Forum: Alternative Engines 09-29-2019, 04:32 AM
Replies: 80
Views: 9,769
Posted By rmartingt
To be fair, the "endurance test" specified in...

To be fair, the "endurance test" specified in 33.87 for turbine engines says:


I suspect that things like market requirements (almost nobody wants an engine with a 150 hour TBO), ETOPS requirements,...
Forum: RV-9/9A 09-28-2019, 01:25 PM
Replies: 7
Views: 691
Posted By rmartingt
My recollection for the -7 spar is you machine...

My recollection for the -7 spar is you machine countersink the anodized spar flange (where the nutplate is) and then dimple the tank skin. At least, that's what I did. The -9 is probably almost...
Forum: Alternative Engines 09-28-2019, 09:41 AM
Replies: 80
Views: 9,769
Posted By rmartingt
Again, it won't work. A four-stroke radial must...

Again, it won't work. A four-stroke radial must have an odd number of cylinders on each bank. You could do two rows of five, or two rows of seven.



Personally the thought of a radial with EFI...
Forum: RV General Discussion/News 09-27-2019, 07:14 PM
Replies: 11
Views: 1,103
Posted By rmartingt
Just make sure she tries one on for a while...

Just make sure she tries one on for a while first. Have her try sitting in one for an hour or two. Some people love the back seat but after about 30 minutes in the back of an -8 I'm practically...
Forum: RV-7/7A 09-25-2019, 09:51 AM
Replies: 15
Views: 1,125
Posted By rmartingt
Angry https://commcourses.com/www/sites/default/files/20...

https://commcourses.com/www/sites/default/files/2018-01/calvinscreaming.jpg

I give up. It seems that even on my own devices it's a crapshoot as to whether the image will show or not. I don't know...
Forum: RV-7/7A 09-25-2019, 07:43 AM
Replies: 15
Views: 1,125
Posted By rmartingt
Okay, I think they're both working now. I really...

Okay, I think they're both working now. I really don't know why this is being so difficult, I have no trouble with pics in my build thread...
Forum: RV-7/7A 09-25-2019, 06:27 AM
Replies: 15
Views: 1,125
Posted By rmartingt
My thinking was Com 2 would primarily be...

My thinking was Com 2 would primarily be inter-flight com for formation work, or just monitoring/ATIS/etc. But my bias may be from the type of flying I've done in the past; I have a good bit of...
Forum: RV-7/7A 09-25-2019, 05:41 AM
Replies: 15
Views: 1,125
Posted By rmartingt
All right, let's try a third time... I don't know...

All right, let's try a third time... I don't know why I'm having so much trouble with this picture as I posted it the same way I did pictures in my build thread...
Forum: RV-7/7A 09-24-2019, 08:16 PM
Replies: 15
Views: 1,125
Posted By rmartingt
Try now, I think I fixed it...

Try now, I think I fixed it...
Forum: RV-7/7A 09-24-2019, 07:51 PM
Replies: 15
Views: 1,125
Posted By rmartingt
Panel concept review (very rough draft)

Although I'm probably a year to a year and a half from really needing to have it set in stone, I figured I probably need to start at least playing with panel concepts now so that I have the time to...
Forum: RV General Discussion/News 09-22-2019, 01:28 PM
Replies: 14
Views: 1,540
Posted By rmartingt
Actually, if my sources for data on gasoline are...

Actually, if my sources for data on gasoline are correct, that's about Mach .000202 in gasoline.

(The speed of sound in gasoline is almost four times faster than in air under usual standard...
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