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Search: Posts Made By: David Z
Forum: RV General Discussion/News 11-28-2022, 08:49 PM
Replies: 12
Views: 751
Posted By David Z
I went there in person to try out different...

I went there in person to try out different headsets. It's great for finding out if the Lightspeed or Bose is more comfortable. They had other pilot supply items available to see too. Basically the...
Forum: RV-8/8A 11-27-2022, 09:18 PM
Replies: 39
Views: 21,254
Posted By David Z
That's great thanks. If that pump didn't damage...

That's great thanks. If that pump didn't damage your tanks, then the little Facet ones I'm looking will be okay too.
Forum: Primers 11-27-2022, 08:59 PM
Replies: 11
Views: 507
Posted By David Z
I found my cheap-o gun harder to use. Less...

I found my cheap-o gun harder to use. Less adjustability, couldn't control the flow rate as well. End result was up with more runs and such. Didn't care so much with the primer because it's hidden....
Forum: Canada 11-24-2022, 07:32 PM
Replies: 2
Views: 436
Posted By David Z
I made the mistake of using UPS once. Learned...

I made the mistake of using UPS once. Learned very quickly not to ship with them again. Expensive lesson. FedEx is slightly better. If you can afford the wait, USPS/Canada Post is the least...
Forum: Alternative Engines 11-09-2022, 07:15 PM
Replies: 40
Views: 3,038
Posted By David Z
Can the longerons and firewall brackets handle...

Can the longerons and firewall brackets handle the extra pull force from the massive increase in power? As much fun as it sounds, I'd hate to see broken airframe parts.

I don't know the answer, but...
Forum: RV-8/8A 11-08-2022, 08:43 PM
Replies: 6
Views: 765
Posted By David Z
I did the gear tower mod, but made a large thick...

I did the gear tower mod, but made a large thick cover plate held on with structural screws. There's a thread on here somewhere detailing how to retain the original strength after cutting out the...
Forum: Alternative Engines 11-02-2022, 09:10 PM
Replies: 85
Views: 7,258
Posted By David Z
Yikes, I seemed to have rattled some nerves. My...

Yikes, I seemed to have rattled some nerves.

My point to Freemasm was fuel pumps can be insanely reliable devices. Having only one fuel pump doesn't bother me in the slightest if it's extremely...
Forum: Alternative Engines 11-02-2022, 06:03 PM
Replies: 85
Views: 7,258
Posted By David Z
Careful with those requirements. Every turboprop...

Careful with those requirements. Every turboprop I've flown is direct injection (injectors in the combustion liner). We're talking 800psi+ and over 100gph on the PT-67D at takeoff. There is also only...
Forum: RV General Discussion/News 10-31-2022, 08:15 PM
Replies: 45
Views: 3,587
Posted By David Z
Especially if you're not quite at Hawaii yet ;)

Especially if you're not quite at Hawaii yet ;)
Forum: Traditional Aircraft Engines 10-31-2022, 08:09 PM
Replies: 10
Views: 946
Posted By David Z
That detent will have different MAP at different...

That detent will have different MAP at different altitudes and even altimeter setting. 29.40 is low and 30.40 is quite high, but that's 1"MAP difference right there. Last summer, I saw 28.95...
Forum: RV General Discussion/News 10-31-2022, 07:49 PM
Replies: 45
Views: 3,587
Posted By David Z
This seems like a fairly simple calculation. We...

This seems like a fairly simple calculation. We know fixed hourly cost like 50hr oil changes. Fuel consumption varies quite dramatically with power setting, but also affects speed. Be interesting to...
Forum: Traditional Aircraft Engines 10-30-2022, 06:44 PM
Replies: 10
Views: 946
Posted By David Z
I've put some thought into it too and came to a...

I've put some thought into it too and came to a similar conclusion, albeit you did more math than I did. However, I noted one big drawback and you did as well:



Take-off or go-around being the big...
Forum: Alternative Engines 10-23-2022, 07:32 PM
Replies: 85
Views: 7,258
Posted By David Z
Massive 18+ cylinder engines run smoother than a...

Massive 18+ cylinder engines run smoother than a 4 cylinder. More cylinders firing away. I'm no expert, but it seems like they'd be easier on a gear box (and propeller).
Forum: Fuel Injection Systems 10-16-2022, 08:37 AM
Replies: 31
Views: 2,365
Posted By David Z
There's a couple pictures of wing root mounted...

There's a couple pictures of wing root mounted filters on Ross's website. The pictures are of an RV8, but the RV7 should be similar.
Forum: RV-10 10-16-2022, 08:31 AM
Replies: 19
Views: 2,682
Posted By David Z
How would a -470 fit as a suitable engine? They...

How would a -470 fit as a suitable engine? They come in 230 and 260hp versions, nearly identical power options to the PV 540. I flew behind a 260hp version in a Cessma 180 and thought it was a great...
Forum: Painting your RV 10-13-2022, 07:07 PM
Replies: 8
Views: 1,314
Posted By David Z
Some of my parts had been epoxy primed a year...

Some of my parts had been epoxy primed a year before paint. Red scotchbrite, rinse off the dust with water, propanol clean and spray the paint.

On a couple parts I was able to spray the paint on...
Forum: Traditional Aircraft Engines 10-04-2022, 08:12 PM
Replies: 12
Views: 1,482
Posted By David Z
At that temperature I'd think the oil would start...

At that temperature I'd think the oil would start to carbonize and burn. Not a flame burn, but smoke point. You'd have dark black, burnt smelling oil. I'd drain a sample to see, but expect that the...
Forum: RV General Discussion/News 09-08-2022, 04:35 PM
Replies: 20
Views: 2,391
Posted By David Z
I'm on year 11, due to life as well. Family being...

I'm on year 11, due to life as well. Family being a higher priority than toys.
Forum: Traditional Aircraft Engines 09-04-2022, 10:27 AM
Replies: 12
Views: 1,320
Posted By David Z
The attached service letter from Lycoming should...

The attached service letter from Lycoming should answer everyone's questions.

Google will find it on Lycoming's website too
Forum: Traditional Aircraft Engines 08-15-2022, 09:38 PM
Replies: 10
Views: 1,294
Posted By David Z
Where's the radiator going?

Where's the radiator going?
Forum: Primers 08-13-2022, 10:30 PM
Replies: 11
Views: 1,765
Posted By David Z
A little bit of overspray will come right off...

A little bit of overspray will come right off when you prep for paint. Didn't know it was possible to dimple with the plastic still on.
Forum: RV-15 08-13-2022, 10:14 PM
Replies: 5
Views: 1,711
Posted By David Z
FWIW, the only "back country" where I live is...

FWIW, the only "back country" where I live is lakes. I'm too much of a wuss to fly on skis, so it needs to have floats if I'm ever to build one.

Been involved in a couple float repairs. Risks of...
Forum: RV General Discussion/News 08-13-2022, 10:01 PM
Replies: 21
Views: 3,289
Posted By David Z
"test pilot" doesn't mean a whole lot when we...

"test pilot" doesn't mean a whole lot when we don't know what they have experience testing. I'm not really interested in having an Airbus test pilot fly an RV first flight. They probably wouldn't...
Forum: RV Building Tips/Techniques 08-10-2022, 09:12 PM
Replies: 10
Views: 1,455
Posted By David Z
Most pulled rivets have lower strength than solid...

Most pulled rivets have lower strength than solid rivets. Not always the case, but generally so.
Forum: RV General Discussion/News 08-08-2022, 06:20 AM
Replies: 8
MPG
Views: 1,039
Posted By David Z
Thats direct too, I wonder how it would compare...

Thats direct too, I wonder how it would compare to "road MPG". By that I mean following roads that zigzag the countryside and don't go direct like an airplane.

I bet airplanes become even more...
Forum: RV General Discussion/News 08-05-2022, 08:24 PM
Replies: 8
Views: 997
Posted By David Z
I haven't done a deep dive into the regs, but I...

I haven't done a deep dive into the regs, but I believe you are correct. Single com radio is legal for IFR in Canada as I understand it.

Yes, there is Canadian requirements for radio navigation...
Forum: Job Board 07-30-2022, 06:01 AM
Replies: 26
Views: 6,387
Posted By David Z
Any chance of this changing?

Any chance of this changing?
Forum: Traditional Aircraft Engines 07-24-2022, 09:43 AM
Replies: 80
Views: 8,974
Posted By David Z
I'd believe that advancing the spark improves...

I'd believe that advancing the spark improves valve life as compared to not advancing the spark at the same mixture setting. LOP setting, mixture burns slower, so want less burning gas going past the...
Forum: RV General Discussion/News 07-22-2022, 05:30 AM
Replies: 22
Views: 4,933
Posted By David Z
Is there going to be a flood of kits and...

Is there going to be a flood of kits and components hitting the classifieds? For Van's sake, I hope not. I don't expect the rate of completion to change a whole lot, so there certainly will be more...
Forum: Electrical Systems 07-21-2022, 01:43 PM
Replies: 11
Views: 1,395
Posted By David Z
This is my favorite. Lower chance of...

This is my favorite. Lower chance of consequential failures and better and failure modes.
Forum: Electrical Systems 07-20-2022, 08:54 PM
Replies: 11
Views: 1,395
Posted By David Z
#2. 24v primary alternator with 12v step down to...

#2. 24v primary alternator with 12v step down to run the rest of the ship

24v alternators run similar amps to 12v alternators. Meaning you get twice the power. Running an AC will take a lot of...
Forum: Alternative Engines 07-20-2022, 08:46 PM
Replies: 29
Views: 4,607
Posted By David Z
I'd love to have a turbine. Operation is dead...

I'd love to have a turbine. Operation is dead simple, always starts (unless the battery is dead), fuel availability, mis-fuelling tolerant. Sure it might not be any more powerful, but I would...
Forum: RV-15 07-20-2022, 08:33 PM
Replies: 457
Views: 114,039
Posted By David Z
Aren't very many C180s in commercial use, just...

Aren't very many C180s in commercial use, just too small. Even the C185 is just too little of an airplane. By the time all the hunting gear, or exploration gear or whatever is packed into a C185,...
Forum: Fuel Injection Systems 07-20-2022, 05:53 AM
Replies: 25
Views: 2,603
Posted By David Z
The most common power switching system for fuel...

The most common power switching system for fuel pumps is much more simple, but relies on a "meat servo" to activate the switch. You have two of them coming out each shoulder :D.

An automatic pump...
Forum: Alternative Engines 07-20-2022, 05:46 AM
Replies: 29
Views: 4,607
Posted By David Z
I wish them the best and hope they succeed. I...

I wish them the best and hope they succeed. I also appreciate the challenges they face.
Forum: RV General Discussion/News 07-18-2022, 07:31 AM
Replies: 8
Views: 914
Posted By David Z
Wait till you see the smudges left by the rivet...

Wait till you see the smudges left by the rivet gun.
Forum: Traditional Aircraft Engines 07-17-2022, 06:56 AM
Replies: 80
Views: 8,974
Posted By David Z
I was also thinking that Carson speed would only...

I was also thinking that Carson speed would only apply in still air, zero wind. Flying with a headwind will increase the most efficient speed. We'll spend longer flying into the headwind, so need to...
Forum: Traditional Aircraft Engines 07-16-2022, 08:32 PM
Replies: 80
Views: 8,974
Posted By David Z
It's interesting that nothing is optimized for...

It's interesting that nothing is optimized for maximum efficiency at the same configuration. Although we are flying "over-powered" sport planes (as if there's a such thing as "over-powered"). Most...
Forum: Safety 07-16-2022, 08:20 PM
Replies: 19
Views: 2,511
Posted By David Z
I flew over a bunch of deer yesterday on short...

I flew over a bunch of deer yesterday on short final. Luckily for me they were running along the OUTSIDE of the airport perimeter fence.
Forum: RV Building Tips/Techniques 07-16-2022, 08:00 AM
Replies: 5
Views: 791
Posted By David Z
Slightly too long rivets in a difficult location...

Slightly too long rivets in a difficult location can lead to problems. If you know its going to squish just perfectly, then go for it, make a nice big shop head. As long as it meets both specs, it's...
Forum: RV-15 07-15-2022, 06:15 AM
Replies: 457
Views: 114,039
Posted By David Z
Currently 33 and building an RV8. Along with my...

Currently 33 and building an RV8. Along with my family and current building, I'll be tied up for at least 10 years. Not much interested in wheels, I'd love to have something on floats. The back...
Forum: RV Building Tips/Techniques 07-13-2022, 09:06 PM
Replies: 16
Views: 1,873
Posted By David Z
Piano hinge is usually the bottom layer too,...

Piano hinge is usually the bottom layer too, meaning it recieves the dimple from other layers. Doesn't much matter if it's a dimple in a dimple, or a dimple in a countersink in the last layer, the...
Forum: RV Building Tips/Techniques 07-13-2022, 03:07 PM
Replies: 16
Views: 1,873
Posted By David Z
The head height on a 3/32" rivet is .036", that's...

The head height on a 3/32" rivet is .036", that's slightly deeper than .032" sheet. It's apparently acceptable, but definitely not preferred. There's a chart somewhere, but can't seem to recall where.
Forum: RV-15 07-10-2022, 06:42 AM
Replies: 457
Views: 114,039
Posted By David Z
They even updated their website:...

They even updated their website: https://www.vansaircraft.com/rv-15/
Forum: Traditional Aircraft Engines 07-08-2022, 07:49 AM
Replies: 53
Views: 9,432
Posted By David Z
Can't tell from the writeup if the mechanical...

Can't tell from the writeup if the mechanical gauge was connected during flight. Could be a wire chaffing with movement in flight. Iratic fluctuations could be a wire intermittently rubbing against...
Forum: RV-10 07-07-2022, 11:40 PM
Replies: 10
Views: 1,212
Posted By David Z
Somewhere along the way I acquired an extra set...

Somewhere along the way I acquired an extra set of the 1/4" wing bolts. I have been using them as temporary bolts. Srayed a little Corrosion X on the shank prior to carefully pushing them in. I'll...
Forum: RV Building Tips/Techniques 07-03-2022, 06:57 AM
Replies: 13
Views: 3,862
Posted By David Z
I put masking tape across the line of holes that...

I put masking tape across the line of holes that need clecos. Only the ones I'm worried about getting that small cleco scuff.

Ocassionally I do get some masking tape in the hole that needs cleaning...
Forum: RV Building Tips/Techniques 06-28-2022, 03:31 PM
Replies: 17
Views: 2,579
Posted By David Z
A popular transport category aircraft, the Dash...

A popular transport category aircraft, the Dash 8. Early versions have the lavatory smoke detector sourced from the local hardware store. My home actually has a fancier models. Hey, it detects smoke...
Forum: Tools 06-27-2022, 10:03 PM
Replies: 20
Views: 2,577
Posted By David Z
My vise is older than probably anyone still...

My vise is older than probably anyone still holding a medical. I'm sure it's been smacked around before I got it and I haven't managed to break it either.

Magnetic jaw pads are mandatory, not sure...
Forum: RV Building Tips/Techniques 06-27-2022, 09:52 PM
Replies: 17
Views: 2,579
Posted By David Z
I've used non-aviation parts where there doesn't...

I've used non-aviation parts where there doesn't seem to be an aviation equivalent and I can't find a way to use aviation specific parts. I'm talking about foam padding and other non-critical...
Forum: Tools 06-27-2022, 09:36 AM
Replies: 32
Views: 5,132
Posted By David Z
Walls are your friend when floor space is...

Walls are your friend when floor space is limited. Hang as many tools off the walls as possible. Under the work bench is another great area to keep stuff.

I put plywood on the walls because it's...
Forum: RV General Discussion/News 06-26-2022, 09:43 PM
Replies: 54
Views: 10,665
Posted By David Z
I've flown two different types with pumps in the...

I've flown two different types with pumps in the wings near/in the tanks. However there were TWO pumps for each tank for a total of 4 pumps. They also happened to be twins, and left tank fed via dual...
Forum: Painting your RV 06-26-2022, 09:59 AM
Replies: 13
Views: 1,157
Posted By David Z
I wiped away all the sanding residue with damp...

I wiped away all the sanding residue with damp paper towels. Cleaned with isopropyl alcohol.

Water is nearly free and harmless to handle (dumped the excess water on my grass and it's not dead yet...
Forum: RV-8/8A 06-25-2022, 08:11 PM
Replies: 39
Views: 21,254
Posted By David Z
Do you happen to know the pressure and flow...

Do you happen to know the pressure and flow capabilities of the transfer pump from Turtle Pac? I'm trying to compare it to what I'll be using. Since you can't over-pressure the wing tanks, that's...
Forum: RV-8/8A 06-25-2022, 06:49 PM
Replies: 39
Views: 21,254
Posted By David Z
Dan 57: what transfer pump are using for the...

Dan 57: what transfer pump are using for the fuselage Turtle tank?

I'm assuming 3/8" transfer line from the Turtle tank and typical 1/4" vent lines?
Forum: RV-8/8A 06-25-2022, 03:09 PM
Replies: 39
Views: 21,254
Posted By David Z
Has anyone come up with a good solution to the...

Has anyone come up with a good solution to the accidental overfill problem? Obviously we're going to watch fuel levels and never intentionally over fill the tank. The consequence of doing that is...
Forum: RV-15 06-16-2022, 07:13 PM
Replies: 60
Views: 23,603
Posted By David Z
5 blade prop is up to the builder, not Van's....

5 blade prop is up to the builder, not Van's. However...

4 - turbine engines
1 - 1st prototype
5 - 50 passengers
X - Xtra back-country mission capable
V - Very slow

Sounds like a deHavilland...
Forum: Alternative Engines 06-16-2022, 06:04 AM
Replies: 42
Views: 6,910
Posted By David Z
UL Power is making great headway, and spending...

UL Power is making great headway, and spending dollars on marketing too. If they made a FWF kit with all the goodies that Van's offers (or better), I bet they'd sell lots. The reputation of...
Forum: RV-7/7A 06-16-2022, 05:58 AM
Replies: 1
Views: 903
Posted By David Z
My understanding of history is that the RV8 "Dash...

My understanding of history is that the RV8 "Dash 1" wing was designed for parts commonality and improvements developed from the RV7.

Essentially the RV8 "Dash 1" wing is an RV7 wing with some...
Forum: RV Building Tips/Techniques 06-13-2022, 08:13 PM
Replies: 6
Views: 1,184
Posted By David Z
Still do at my job. We call it "start taxi",...

Still do at my job. We call it "start taxi", "up", down" and "engines off" and have to write it down manually. Most airlines track all this remotely through electronic means.
Forum: RV-15 06-05-2022, 10:01 PM
Replies: 51
Views: 22,406
Posted By David Z
180hp on floats with the same airframe capable of...

180hp on floats with the same airframe capable of 260hp would create the fastest boat on the lake. :D Maybe a restriction of "210hp min for float equipped aircraft".
Forum: RV Building Tips/Techniques 06-05-2022, 09:58 PM
Replies: 8
Views: 716
Posted By David Z
Just for throwing another's setup out there, this...

Just for throwing another's setup out there, this is what I do.

-One bigger air line (1/2" IIRC) at 90psi for tools with motors or want fixed 90 psi. Works great for my impact wrench when changing...
Forum: RV-8/8A 06-04-2022, 08:43 PM
Replies: 5
Views: 710
Posted By David Z
I'm actually building a new bracket right now for...

I'm actually building a new bracket right now for my Newton duplex valve.
Forum: RV models of the future (RV-??) 05-28-2022, 05:53 PM
Replies: 53
Views: 11,111
Posted By David Z
Between this thread and the RV-twin thread...

Between this thread and the RV-twin thread (https://vansairforce.net/community/showthread.php?t=202652), it's got me thinking of the Velocity Twin. While I'm sure they're great planes, not sure how...
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