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Search: Posts Made By: David Z
Forum: RV-8/8A 12-02-2021, 07:49 PM
Replies: 16
Views: 846
Posted By David Z
We're really not talking about very much money...

We're really not talking about very much money here. Hardware, no matter the type is fairly inexpensive. I maintain a good stock of AN hardware, and often fix non-airplane things with it. Just not...
Forum: RV models of the future (RV-??) 12-01-2021, 08:33 PM
Replies: 42
Views: 3,730
Posted By David Z
Messy

Hydrocarbon fuels also mean lubrication oil. This all eventually leaks from somewhere. Needs maintenance, is messy, needs proper disposal.

Air cooled electric motor has no need for lubrication oil,...
Forum: RV-8/8A 12-01-2021, 08:21 PM
Replies: 18
Views: 751
Posted By David Z
Assuming that skin is structural, how did you...

Assuming that skin is structural, how did you ensure the structural integrity of the fuselage skin? I think the AC43.13 covers structural panels somewhere, but I could be mistaken. I like your idea,...
Forum: RV-10 12-01-2021, 08:15 PM
Replies: 26
Views: 1,441
Posted By David Z
I'm doing a combination. Quadrant for...

I'm doing a combination. Quadrant for throttle/prop. Mixture will be Vernier (more likely EFI).

Reason is during a go-around or any need for power NOW, I can push the mixture forward then both...
Forum: RV Building Tips/Techniques 12-01-2021, 08:02 PM
Replies: 10
Views: 254
Posted By David Z
Drill bit extension? If you can get the...

Drill bit extension?

If you can get the preceding hole drilled, put the extension through the hole, put the step drill onto the extension, and go slow.
Forum: RV General Discussion/News 11-22-2021, 06:07 AM
Replies: 10
Views: 1,012
Posted By David Z
Maybe I'm adding even more to the semantics...

Maybe I'm adding even more to the semantics discussion.

At work, the paperwork in the airplane logbook will say " deterred as per MEL..."

Why couldn't we deferr a broken beacon by writing "deferred...
Forum: Primers 11-21-2021, 04:43 PM
Replies: 8
Views: 565
Posted By David Z
I have a compressor similar to Carl (previous...

I have a compressor similar to Carl (previous post). It handles painting quite well, but not sure I'd want anything much smaller. It uses 17amps at 240v, so a lot of juice that you said you don't...
Forum: RV Building Tips/Techniques 11-21-2021, 04:24 PM
Replies: 12
Views: 1,179
Posted By David Z
I've had reasonable success using a nut plate,...

I've had reasonable success using a nut plate, but only for 2 or 3 times. Yes the holes in the nut plate start to wander, so I toss it in the garbage and grab another one. I can toss about 75 nut...
Forum: RV General Discussion/News 11-21-2021, 04:16 PM
Replies: 23
Views: 1,260
Posted By David Z
I'm sure somebody in YZF has some deice fluid....

I'm sure somebody in YZF has some deice fluid. See if you can get a gallon of Type 1 de-ice fluid. Use a rag soaked in the deice fluid to wipe off the frost. If it's thick sloppy frozen slush, spray...
Forum: RV models of the future (RV-??) 11-19-2021, 08:33 PM
Replies: 42
Views: 3,730
Posted By David Z
Post I've wondered about going the other way. F1...

I've wondered about going the other way. F1 Rockets already covered the hopped up, fast (thirsty) tandem seat market. They don't seem to be selling too quickly, so why enter a small market. How about...
Forum: RV-8/8A 11-19-2021, 08:21 PM
Replies: 26
Views: 2,266
Posted By David Z
A properly pitched FP prop for top speed or other...

A properly pitched FP prop for top speed or other specific configuration has two advantages. Weight is the obvious one, and no prop governor. I'm sure the governor isn't taking huge amounts of power,...
Forum: Safety 11-17-2021, 08:17 PM
Replies: 8
Views: 772
Posted By David Z
I've always wanted to break a chunk of ice off an...

I've always wanted to break a chunk of ice off an antenna or other unprotected surface and put it in my drink. Getting a piece off the spinner would be fun, little bowl shaped piece of ice. FIKI...
Forum: Tools 11-15-2021, 08:36 PM
Replies: 23
Views: 1,486
Posted By David Z
My shop stays very organized. Common use, and...

My shop stays very organized. Common use, and most airplane specific tools are hanging on the wall. I put plywood on the wall specifically to ensure the strength to hang tools. Other tools are in the...
Forum: Safety 11-15-2021, 08:08 PM
Replies: 3
Views: 1,088
Posted By David Z
The opportunity for aircraft damage is usually...

The opportunity for aircraft damage is usually take-off and landing. I do a quick cursory look over everything before hopping in the airplane every time.

Was there a stray rock on the runway that...
Forum: Canada 11-14-2021, 06:06 AM
Replies: 13
Views: 815
Posted By David Z
As far as airworthiness goes (and this includes...

As far as airworthiness goes (and this includes registration marks), wouldn't they have to meet the requirements of the country the aircraft is registered in?

Certainly air law applies, but not the...
Forum: RV General Discussion/News 11-13-2021, 04:19 PM
Replies: 20
Views: 4,660
Posted By David Z
Changes

In June, the Van's site said lead times of 6 months for RV8 finish kits. Planning on that, I ordered it hoping for a Christmas present.

Well, the build is taking longer than anticipated and I'm in...
Forum: Primers 11-07-2021, 10:46 AM
Replies: 13
Views: 1,450
Posted By David Z
My tail feathers are primed mating surfaces only....

My tail feathers are primed mating surfaces only. They passed the MDRA inspection. Alclad provides corrosion protection for anyone asking. Certainly prime the non-alclad parts.
Forum: RV-10 11-06-2021, 07:14 AM
Replies: 7
Views: 467
Posted By David Z
There's a pop rivet dimple die tool...

There's a pop rivet dimple die tool https://www.aircraftspruce.com/catalog/topages/ats_12-00169.php

It's not the quickest or most fun tool in the shop. If it's a couple holes in the middle of a big...
Forum: RV General Discussion/News 11-06-2021, 07:04 AM
Replies: 32
Views: 3,276
Posted By David Z
I ordered my finish kit a long while back trying...

I ordered my finish kit a long while back trying to plan the lead time. Well progress has been slow and I don't think I'll be ready for the finish kit when that time is reached. A few extra delays...
Forum: Electrical Systems 11-01-2021, 07:24 PM
Replies: 42
Views: 3,847
Posted By David Z
I plan on taking my battery to -40. Maybe not on...

I plan on taking my battery to -40. Maybe not on the ground, probably use a -30°c cutoff. But in flight at altitude, it's possible I'll see -40.

Unless I see hard evidence against, my plan is to...
Forum: RV General Discussion/News 11-01-2021, 07:06 PM
Replies: 15
Views: 2,064
Posted By David Z
I ran a generator on 100LL. After 10-15 gallons,...

I ran a generator on 100LL. After 10-15 gallons, it started to misfire under high load. Run a few gallons of regular car gas and it cleared right up. My theory is the lead was causing issues with the...
Forum: Primers 10-28-2021, 07:24 PM
Replies: 8
Views: 899
Posted By David Z
I do a mix of everything, depends on the order of...

I do a mix of everything, depends on the order of assembly. Some of the fuselage bulkheads get primed and partially built before drilled to the skins. In that case, you have to prime before...
Forum: Canada 10-28-2021, 07:14 PM
Replies: 3
Views: 629
Posted By David Z
I have never experienced this problem personally....

I have never experienced this problem personally. Everything marked "warranty/replacement" gets across the border without tax.

You fully have my compassion though. Sounds like a miserable experience.
Forum: Primers 10-26-2021, 08:02 PM
Replies: 10
Poll: Rust-Oleum
Views: 953
Posted By David Z
I've got a mixed bag. Tail section is mating...

I've got a mixed bag. Tail section is mating surfaces only with self-etching hardware. Wings are zinc chromate/oxide. Fuselage is 2-part epoxy.

Throughout, whenever something small needs a little...
Forum: RV-14 10-24-2021, 07:31 PM
Replies: 12
Views: 1,442
Posted By David Z
Make the tailwheel out of used chewing gum for...

Make the tailwheel out of used chewing gum for increased traction and braking effectiveness. :D

Yes I understand this thread is about the main gear on a taildragger. Play on words is fun though.
Forum: RV-10 10-15-2021, 07:46 PM
Replies: 9
Views: 1,363
Posted By David Z
Rough napkin math here, comparing to a similar...

Rough napkin math here, comparing to a similar gasoline engine like the -540. The diesel is burning 10lbs/hr less fuel (9gal/hr @ 6.7lbs/gal diesel versus 12gal/hr @ 6.0gal/hr gasoline). For an...
Forum: Fuel Injection Systems 10-14-2021, 07:22 PM
Replies: 44
Views: 12,322
Posted By David Z
I'm making super slow, but steady progress on my...

I'm making super slow, but steady progress on my fuselage (family before hobby). Planning full EFI. I'll be at the stage of running fuel lines, installing pumps and such soon. Probably sometime...
Forum: RV General Discussion/News 10-10-2021, 07:36 AM
Replies: 10
Views: 812
Posted By David Z
I think he is meaning to say the test coupons...

I think he is meaning to say the test coupons won't sit flush, unless countersunk too deep. The radius edge of the countersink will interfere with the slightly rounded radius edge of the dimple. The...
Forum: Safety 10-09-2021, 05:21 PM
Replies: 17
Views: 1,818
Posted By David Z
Not just jamming, but large solar flares can...

Not just jamming, but large solar flares can interfere with the ionosphere and cause accuracy issues with GPS. Sure enroute accuracy might remain available, but approach level might not work.

I...
Forum: RV-8/8A 10-07-2021, 07:41 PM
Replies: 8
Views: 1,027
Posted By David Z
My 2020 vintage RV8 fuselage was NOT drilled...

My 2020 vintage RV8 fuselage was NOT drilled (still isn't).
Forum: RV-7/7A 10-04-2021, 07:46 PM
Replies: 22
Views: 3,686
Posted By David Z
Hahaha, this thread is fantastic! I have to ask...

Hahaha, this thread is fantastic!

I have to ask though. What did Van's support come back with as a repair?
Forum: Safety 10-03-2021, 06:34 PM
Replies: 7
Views: 694
Posted By David Z
Most (all?) airliners stick the flight management...

Most (all?) airliners stick the flight management computer (GPS with other navigation/flight management capabilities) down low below the panel and on the center console.

With the installation I'm...
Forum: RV-14 09-30-2021, 05:09 AM
Replies: 18
Views: 1,538
Posted By David Z
Clecos are like aircraft engine power. You can...

Clecos are like aircraft engine power. You can never have enough!

I ordered what Van's told me to. Building one wing at a time, I was just barely sufficient. Come fuselage time, I borrowed a lot and...
Forum: RV General Discussion/News 09-27-2021, 10:06 PM
Replies: 32
Views: 3,536
Posted By David Z
There are also the same two kinds of countries;...

There are also the same two kinds of countries; those that lost the Mars Climate Orbiter due to unit of measure confusion and those that use only metric. :D
Forum: Tools 09-24-2021, 05:32 AM
Replies: 15
Views: 1,144
Posted By David Z
I have a fairly large plate. 12" by 30". The...

I have a fairly large plate. 12" by 30". The problem. Is its 1/4" mild steel, so it flexes very slightly under riveting. Means the rivets take a long time to set, or I turn up the pressure. Rarely...
Forum: RV General Discussion/News 09-21-2021, 09:12 PM
Replies: 32
Views: 3,536
Posted By David Z
Fahren..who? Was he part of that argument in...

Fahren..who? Was he part of that argument in 1776? Kelvin and Celsius gave up on the 13 little colonies in the Americas. :D

Kidding aside, you know you're flying a long way when transitioning...
Forum: RV Building Tips/Techniques 09-20-2021, 11:06 AM
Replies: 23
Views: 4,289
Posted By David Z
I did this once by putting FT-lbs on a bolt...

I did this once by putting FT-lbs on a bolt instead of IN-lbs. Strangely enough, it was the 3rd one that broke. First two were significantly over torqued, but didn't break. Yes they were all replaced.
Forum: Interiors 09-19-2021, 07:20 AM
Replies: 11
Views: 1,413
Posted By David Z
I spent a lot of time sitting on sleep skin...

I spent a lot of time sitting on sleep skin seats. They were great. Current work plane has some sort of thick poly-fabric. It's horrible!

For my plane, I'm a long way from deciding, but am leaning...
Forum: RV Building Tips/Techniques 09-17-2021, 08:39 PM
Replies: 20
Views: 2,064
Posted By David Z
Well this is a relief. It's what I've been doing...

Well this is a relief. It's what I've been doing the whole time. Usually I'm just cutting out primer that's gumming up the holes. Hard to argue with such a reliable source.
Forum: RV General Discussion/News 09-17-2021, 08:23 PM
Replies: 127
Views: 20,919
Posted By David Z
I assumed a lot of Reno engines consumed...

I assumed a lot of Reno engines consumed non-aviation specific high octane jungle juice. Some of that stuff is 120+ octane. Unleaded is a little bit less, but all are well over 100 octane. When an...
Forum: Traditional Aircraft Engines 09-16-2021, 01:29 PM
Replies: 22
Views: 2,385
Posted By David Z
I'm curious what defect or abnormal occurrence...

I'm curious what defect or abnormal occurrence caused that sign-out. Hit a sparrow or other small bird is a vastly different prop strike compared to a sudden stoppage on a concrete block. Sometimes...
Forum: Tools 09-16-2021, 08:01 AM
Replies: 10
Views: 988
Posted By David Z
Most holes I deburr with a larger drill bit spun...

Most holes I deburr with a larger drill bit spun with my fingers. We're only taking off the burrs and being careful not to countersink the metal. Cautious is the name of the game.

Some blind holes...
Forum: RV-8/8A 09-14-2021, 07:54 PM
Replies: 25
Views: 5,377
Posted By David Z
If it's an electrically powered system, set up...

If it's an electrically powered system, set up some sort of ground power system capable of pre-cooling the cabin. Plug it in, cool the cabin down. Then unplug, start up, and go.
Forum: RV General Discussion/News 09-14-2021, 07:42 PM
Replies: 49
Views: 12,518
Posted By David Z
Clecos are like horsepower. "Adequate means not...

Clecos are like horsepower.
"Adequate means not enough
Lots is getting close
Way too many is just about right"
Forum: RV General Discussion/News 09-13-2021, 02:00 PM
Replies: 30
Views: 12,417
Posted By David Z
Are carb air temperature gauges easy to put on an...

Are carb air temperature gauges easy to put on an RV?
Forum: International 09-12-2021, 08:53 PM
Replies: 23
Views: 3,433
Posted By David Z
I avoid UPS like the plague. Shipping price looks...

I avoid UPS like the plague. Shipping price looks good, but there's always a "customs fee" or something that shows up in the mail a few weeks later. FedEx is almost as bad. USPS is my preferred for...
Forum: RV-8/8A 09-12-2021, 08:39 PM
Replies: 3
Views: 836
Posted By David Z
Short answer: yes Long answer:...

Short answer: yes
Long answer: https://vansairforce.net/community/showthread.php?t=192108
Forum: RV-14 09-12-2021, 08:32 PM
Replies: 15
Views: 1,825
Posted By David Z
I had my RV8 wings mostly built in 8 months. This...

I had my RV8 wings mostly built in 8 months. This is doing 6-8hrs per day. Also no final-size holes and had to final size everything. RV14 should be faster.

The other thing to consider is it's...
Forum: RV-7/7A 09-10-2021, 08:24 PM
Replies: 15
Views: 2,178
Posted By David Z
That's the beauty of experimental aviation. We...

That's the beauty of experimental aviation. We can build a plane to tinker with a one-off engine and "experiment" to see if we can make a ____ engine successfully power the aircraft. Then continue...
Forum: Reviews 09-05-2021, 12:50 PM
Replies: 53
Views: 7,237
Posted By David Z
Nickel or stainless steel leading edges are...

Nickel or stainless steel leading edges are extremely common on other composite propellors. Just because there are issues with certain Catto props doesn't mean all nickel leading edges have...
Forum: Traditional Aircraft Engines 09-03-2021, 04:55 PM
Replies: 23
Views: 3,684
Posted By David Z
Well that's irritating. Did they forget that...

Well that's irritating. Did they forget that 100LL changes density with temperature and is likely off my more than 3% on most days anyway? Our 6lbs/gal is only good at 15°c, and that's not terribly...
Forum: Reviews 09-03-2021, 04:50 PM
Replies: 53
Views: 7,237
Posted By David Z
Wouldn't the nickel leading edge be more damage...

Wouldn't the nickel leading edge be more damage tolerant than just tape? How many airports are 100% free from all sand and small pebbles. Those do a number on props. Harder leading edge material will...
Forum: RV General Discussion/News 09-03-2021, 04:46 PM
Replies: 10
RV5
Views: 1,587
Posted By David Z
Is it being revived and going to sell kits?

Is it being revived and going to sell kits?
Forum: Alternative Engines 09-03-2021, 04:44 PM
Replies: 37
Views: 6,249
Posted By David Z
I really hope somebody succeeds in the small...

I really hope somebody succeeds in the small turbine realm. They're expensive, but brain dead simple to operate. Put the wrong fuel in? Probably won't notice. Keep the gauges in the green and you're...
Forum: RV-7/7A 09-02-2021, 09:51 PM
Replies: 20
Views: 4,147
Posted By David Z
There is, but it's astronomically expensive and...

There is, but it's astronomically expensive and only 1lb lighter. Sky Designs sells it. Still waiting for my money tree to start producing. :D
Forum: Traditional Aircraft Engines 09-02-2021, 11:09 AM
Replies: 23
Views: 3,684
Posted By David Z
I was involved with a fair amount of gliding in...

I was involved with a fair amount of gliding in my younger days. Being the one who held the wing tip of the glider until past running speed was always a fun job. Fantastic smell of the 100LL avgas...
Forum: Traditional Aircraft Engines 09-01-2021, 10:00 PM
Replies: 23
Views: 3,684
Posted By David Z
Half the problem is who consumes 100LL. Us little...

Half the problem is who consumes 100LL. Us little RVs and most trainers are flying around burning 10gal/hr or less in lower compression engines and are mostly fine with 91-95 octane.

Those with...
Forum: Traditional Aircraft Engines 08-31-2021, 11:39 AM
Replies: 23
Views: 3,684
Posted By David Z
I saw a similar article. The last line said...

I saw a similar article. The last line said (paraphrasing) "small aircraft still use leaded aviation fuel".

Most people find it convenient to forget that there is also racing fuel with lead in it....
Forum: Reviews 08-31-2021, 11:31 AM
Replies: 53
Views: 7,237
Posted By David Z
How big of a dent did the screw leave when it hit...

How big of a dent did the screw leave when it hit the prop?
Forum: RV General Discussion/News 08-28-2021, 06:38 AM
Replies: 42
Views: 4,753
Posted By David Z
Been using my Lights peed Zulu.2 for 10 years now...

Been using my Lights peed Zulu.2 for 10 years now and love them. I have tried everything from the $200 headset to a fancy (but older) Bose and always come back to my Lightspeeds.

Bose and...
Forum: Alternative Engines 08-24-2021, 10:36 PM
Replies: 16
Views: 3,109
Posted By David Z
That's good. I still have to buy a bunch of parts...

That's good. I still have to buy a bunch of parts from you over the next few years.
Forum: RV General Discussion/News 08-22-2021, 07:56 PM
Replies: 32
Views: 4,385
Posted By David Z
You can always reduce the power on a bigger...

You can always reduce the power on a bigger engine. Can't go more than full on a smaller engine. By reduce the power, the options are RPM, LOP or throttle and in whichever order and flavour is...
Forum: RV General Discussion/News 08-20-2021, 01:29 PM
Replies: 7
Views: 940
Posted By David Z
When I flew Navajos, we routinely operated down...

When I flew Navajos, we routinely operated down to -35°c. Generally stopped preheating the engines when the temps were slightly above freezing.

We also used miniature space heaters in the cowl with...
Forum: Electrical Systems 08-20-2021, 10:56 AM
Replies: 11
Views: 1,816
Posted By David Z
Generators don't need an electricity source to...

Generators don't need an electricity source to start. Just spin and power comes out. Has an interesting potential for back-up power. But yes, the lack of any power at low RPM is the downside.
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