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Search: Posts Made By: David Z
Forum: Traditional Aircraft Engines 10-04-2022, 07:12 PM
Replies: 12
Views: 909
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, 03:35 PM
Replies: 20
Views: 1,984
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, 09:27 AM
Replies: 12
Views: 1,117
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, 08:38 PM
Replies: 10
Views: 1,075
Posted By David Z
Where's the radiator going?

Where's the radiator going?
Forum: Primers 08-13-2022, 09:30 PM
Replies: 11
Views: 1,499
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, 09:14 PM
Replies: 5
Views: 1,287
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, 09:01 PM
Replies: 21
Views: 2,867
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, 08:12 PM
Replies: 10
Views: 1,161
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, 05:20 AM
Replies: 8
MPG
Views: 931
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, 07:24 PM
Replies: 8
Views: 815
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, 05:01 AM
Replies: 26
Views: 5,854
Posted By David Z
Any chance of this changing?

Any chance of this changing?
Forum: Traditional Aircraft Engines 07-24-2022, 08:43 AM
Replies: 74
Views: 6,289
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, 04:30 AM
Replies: 22
Views: 4,488
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, 12:43 PM
Replies: 11
Views: 1,180
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, 07:54 PM
Replies: 11
Views: 1,180
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, 07:46 PM
Replies: 29
Views: 4,117
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, 07:33 PM
Replies: 457
Views: 104,148
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, 04:53 AM
Replies: 25
Views: 2,308
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, 04:46 AM
Replies: 29
Views: 4,117
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, 06:31 AM
Replies: 8
Views: 801
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, 05:56 AM
Replies: 74
Views: 6,289
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, 07:32 PM
Replies: 74
Views: 6,289
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, 07:20 PM
Replies: 19
Views: 2,161
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, 07:00 AM
Replies: 5
Views: 711
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, 05:15 AM
Replies: 457
Views: 104,148
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, 08:06 PM
Replies: 16
Views: 1,593
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, 02:07 PM
Replies: 16
Views: 1,593
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, 05:42 AM
Replies: 457
Views: 104,148
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, 06:49 AM
Replies: 53
Views: 8,401
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, 10:40 PM
Replies: 10
Views: 1,107
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, 05:57 AM
Replies: 13
Views: 3,619
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, 02:31 PM
Replies: 17
Views: 2,293
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, 09:03 PM
Replies: 20
Views: 2,335
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, 08:52 PM
Replies: 17
Views: 2,293
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, 08:36 AM
Replies: 32
Views: 4,454
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, 08:43 PM
Replies: 54
Views: 10,031
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, 08:59 AM
Replies: 13
Views: 1,006
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, 07:11 PM
Replies: 34
Views: 20,099
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, 05:49 PM
Replies: 34
Views: 20,099
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, 02:09 PM
Replies: 34
Views: 20,099
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, 06:13 PM
Replies: 60
Views: 22,075
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, 05:04 AM
Replies: 42
Views: 6,028
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, 04:58 AM
Replies: 1
Views: 818
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, 07:13 PM
Replies: 6
Views: 1,127
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, 09:01 PM
Replies: 51
Views: 21,181
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, 08:58 PM
Replies: 8
Views: 653
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, 07:43 PM
Replies: 5
Views: 611
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, 04:53 PM
Replies: 53
Views: 10,280
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...
Forum: Safety 05-22-2022, 07:15 PM
Replies: 3
Views: 1,472
Posted By David Z
Been flying the work plane a lot recently too. It...

Been flying the work plane a lot recently too. It has pneumatic wing deice boots. They've been rather "crusty" as of late too. By crusty, I mean ice bits that aren't entirely removed by the boot...
Forum: RV General Discussion/News 05-21-2022, 11:45 AM
Replies: 35
Views: 7,054
Posted By David Z
Maybe the price of engines will go down? :D As...

Maybe the price of engines will go down? :D

As one who's still building and looking forward to flying, I sure wouldn't mind if our hobby became a little cheaper.

If someone buys an airplane as an...
Forum: Traditional Aircraft Engines 05-20-2022, 06:31 AM
Replies: 19
Views: 1,942
Posted By David Z
Modern automotive oils aren't designed for leaded...

Modern automotive oils aren't designed for leaded fuels, or lead contaminants. Wasn't the case post WW2 when automotive gasoline was leaded. Not suggesting it was okay then, but it's even less okay...
Forum: RV General Discussion/News 05-20-2022, 06:14 AM
Replies: 38
Views: 7,413
Posted By David Z
Yes Please! While the standard tanks are just...

Yes Please! While the standard tanks are just adequate for my planned uses, a little extra will be great for those headwind days. I'm contemplating a small fuselage tank, but this is a much cleaner...
Forum: RV-15 05-17-2022, 10:41 AM
Replies: 51
Views: 21,181
Posted By David Z
I second that! Need some pretty big tires to...

I second that!

Need some pretty big tires to roll over the trees and rocks in the Canadian Shield. Lots of lakes though :D
Forum: Primers 05-12-2022, 08:08 PM
Replies: 13
Views: 1,501
Posted By David Z
I've done varying treatments throughout the...

I've done varying treatments throughout the plane.

Tail got mating surfaces primed with hardware store rattle can primer.
Wings got zinc chromate over everything with alumiprep/alodine
Fuselage is...
Forum: Traditional Aircraft Engines 05-12-2022, 07:55 PM
Replies: 14
Views: 2,735
Posted By David Z
Turbos also heat the intake air. That's bad for...

Turbos also heat the intake air. That's bad for detonation. What might be okay down low with little/no turbo boost will create a lot of compressive heating of the intake air up high once the turbo...
Forum: RV-8/8A 05-12-2022, 06:49 AM
Replies: 5
Views: 824
Posted By David Z
Alodine is the "proper" way to prep for priming...

Alodine is the "proper" way to prep for priming and paint. Many people skip this step due to it being highly toxic. Myself included.
Forum: RV General Discussion/News 05-12-2022, 06:42 AM
Replies: 35
Views: 4,031
Posted By David Z
Fridge

I'm surprised nobody has mentioned a fridge/freezer. Great for keeping those beers cold for after a good work day. Secondary use is freezing sealants, paint, primer and other things for extending pot...
Forum: RV-15 05-09-2022, 08:53 PM
Replies: 40
Views: 22,827
Posted By David Z
It's a new hemoglobin based primer product. Uses...

It's a new hemoglobin based primer product. Uses iron instead of zinc from the zinc chromate primers of yester-year.

No breathing protection required, but the person applying this primer will still...
Forum: Electrical Systems 05-07-2022, 07:16 PM
Replies: 69
Views: 9,464
Posted By David Z
At the rate I'm building my RV8, perhaps I'll...

At the rate I'm building my RV8, perhaps I'll have primary and secondary electrical generation from Monkworks ;)
Forum: RV General Discussion/News 04-29-2022, 07:19 PM
Replies: 28
Views: 2,858
Posted By David Z
If someone wants to cruise an IO-360 at 110hp and...

If someone wants to cruise an IO-360 at 110hp and 7500', that can be done at full throttle, being 22" and 2400rpm (made up numbers for example sake). Now if ram air can deliver an extra bit of...
Forum: RV General Discussion/News 04-28-2022, 04:42 PM
Replies: 28
Views: 2,858
Posted By David Z
Anything restricting the intake lowers engine...

Anything restricting the intake lowers engine efficiency. This includes a throttle plate, air filter or anything. Unfiltered ram air increases manifold pressure, so to maintain the same total power,...
Forum: RV-15 04-27-2022, 01:38 PM
Replies: 16
Views: 3,585
Posted By David Z
With all the secrecy and hoopla being created...

With all the secrecy and hoopla being created over the RV15, I'm surprised there isn't a poster of a skunk on the wall somewhere. The "Van's Skunkworks".
Forum: RV-10 04-26-2022, 08:15 AM
Replies: 29
Views: 6,916
Posted By David Z
I'm going to disagree. The 200-300hp range is...

I'm going to disagree. The 200-300hp range is very popular outside RVs. The RV10 platform is perfect to experiment within that range. There's lots of talk of ~200hp turbines going on the RV8 because...
Forum: RV-10 04-25-2022, 12:43 PM
Replies: 29
Views: 6,916
Posted By David Z
At one point, Lycoming was the...

At one point, Lycoming was the "alternative".

Rotax was the alternative option that now seems to have done a pretty good job at making the O-200 and O-235 obsolete.

As much as we love our -360 and...
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