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Search: Posts Made By: David Z
Forum: Safety Yesterday, 06:58 PM
Replies: 49
Views: 4,580
Posted By David Z
Several moons ago, I was having a beer with a...

Several moons ago, I was having a beer with a mechanic from a previous job. He shared the story about how he ended up at his (at the time) present employer. He got fired during an inspection of the...
Forum: RV General Discussion/News Yesterday, 06:52 PM
Replies: 19
Views: 2,826
Posted By David Z
The 170 was improved by calling it the 180 and...

The 170 was improved by calling it the 180 and putting in 230hp. The late model 180s with the longer cabin were under-powered until they called it the 185. But then it's 300hp, guzzles gas and a big...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) Yesterday, 06:39 PM
Replies: 9
Views: 342
Posted By David Z
FedEx probably thought "only 40 grand for an...

FedEx probably thought "only 40 grand for an airplane engine! Why can't we put these on our planes?". A 777 engine is probably closer to 40 million.
Forum: Safety 04-14-2021, 06:58 PM
Replies: 49
Views: 4,580
Posted By David Z
Pressurization Tester

I watched someone make a home-brew aircraft pressurization tester. Found a high flow, low pressure pump, ran it on 220v electric motor and was able to pressurize a King Air to about 4psi. But WOW,...
Forum: RV General Discussion/News 04-14-2021, 06:47 PM
Replies: 13
Views: 623
Posted By David Z
Add to Scott's post, fuel injected high wing...

Add to Scott's post, fuel injected high wing aircraft as well. I have never heard of parallel mechanical/electric fuel pumps used in aircraft. This is a case of "if it ain't broke, don't fix it" or...
Forum: International 04-12-2021, 06:32 AM
Replies: 19
Views: 2,189
Posted By David Z
The bill at the end is the same. In a past life,...

The bill at the end is the same. In a past life, I'd pull up to the self serve pumps in a Piper Navajo at 2+ per liter. Total bill was easily over $1000 if flying a long way. Over $300/hr just in...
Forum: RV General Discussion/News 04-11-2021, 09:12 PM
Replies: 19
Views: 2,826
Posted By David Z
I was thinking of fuel lines, but your idea is...

I was thinking of fuel lines, but your idea is more exciting.
Forum: RV General Discussion/News 04-10-2021, 07:52 AM
Replies: 29
Views: 2,537
Posted By David Z
My suggestions: - find a partially built project....

My suggestions:
- find a partially built project. I saved about 40% off the cost of my wing kit.
- glass panel. This one sounds a bit odd, but a single screen basic panel will cover almost...
Forum: RV General Discussion/News 04-08-2021, 06:32 PM
Replies: 5
Views: 684
Posted By David Z
That is a great shop. Your compressed air set-up...

That is a great shop. Your compressed air set-up is similar to mine. I have an line-oiler for the tools that like oil and a filtered, dry air line for tools that like clean dry air. Then different...
Forum: Close Calls / Lessons Learned 04-07-2021, 08:28 PM
Replies: 79
Views: 7,460
Posted By David Z
To clarify the previous comments about ice...

To clarify the previous comments about ice protection, pitot and static heat is on whenever airborne. It's the other ice protection systems (props, wings, windshield, engine intakes, etc.) that are...
Forum: RV-8/8A 04-06-2021, 09:07 PM
Replies: 9
Views: 606
Posted By David Z
Water

Water is great because it can be dumped out on the ramp and nobody cares. Then later, it can be refilled for almost free.
Forum: RV-10 04-06-2021, 08:57 PM
Replies: 13
Views: 1,428
Posted By David Z
In reference to the above post, I fly into #3...

In reference to the above post, I fly into #3 gravel all the time, prepared gravel runways. Those runways do a number on airplanes! The nosewheels kick gravel up against the belly of the plane,...
Forum: RV-10 04-06-2021, 06:25 AM
Replies: 13
Views: 1,428
Posted By David Z
Look up pictures of the Cessna Caravan mud...

Look up pictures of the Cessna Caravan mud guards. Something similar could be created easily at low cost. Then you're not damaging wheel pants or the under side of the wings. Can't imagine they'd be...
Forum: ADS-B 04-05-2021, 06:17 PM
Replies: 24
Views: 2,302
Posted By David Z
Haha, I did that a few weeks ago. Albeit not in a...

Haha, I did that a few weeks ago. Albeit not in a 747, but in a work plane nonetheless. I'll call it "delusions of more fun".
Forum: RV Friends Who Have Passed On 04-04-2021, 01:58 PM
Replies: 62
Views: 12,636
Posted By David Z
They certainly stalled the aircraft during...

They certainly stalled the aircraft during certification flight testing. Whether they have the data required to program training sims is a different question.
Forum: Close Calls / Lessons Learned 04-03-2021, 11:11 AM
Replies: 79
Views: 7,460
Posted By David Z
There-in lies the trick. Sometimes a person will...

There-in lies the trick. Sometimes a person will forget to turn on the pitot heat in clouds. It's quite easy to forget when task saturated. That's part of the reason for this thread's existence. Is...
Forum: Close Calls / Lessons Learned 04-02-2021, 06:50 PM
Replies: 79
Views: 7,460
Posted By David Z
Sorry, I should clarify. I didn't mean literally...

Sorry, I should clarify. I didn't mean literally all the time, 24/7, only when airborne. Turn it on before take-off and turn it off after landing. That way there's airflow to keep it from...
Forum: Close Calls / Lessons Learned 04-02-2021, 06:15 AM
Replies: 79
Views: 7,460
Posted By David Z
Is there a concern about having the pitot heat on...

Is there a concern about having the pitot heat on all the time? It isn't necessary, but if it doesn't hurt anything either, why not? Better than forgetting it the one time it is needed.
Forum: RV Friends Who Have Passed On 04-01-2021, 03:51 PM
Replies: 62
Views: 12,636
Posted By David Z
I did some digging on this. It's easy to find the...

I did some digging on this. It's easy to find the number of stall/spin accidents in each country. A couple hours of data digging and could have the total number in each country for a calendar year,...
Forum: Close Calls / Lessons Learned 03-31-2021, 08:51 PM
Replies: 79
Views: 7,460
Posted By David Z
Another very strong motivator to maintain VMC,...

Another very strong motivator to maintain VMC, thus VFR is icing. A non-icing plane such as all RVs must never be intentionally flown in icing conditions. So IFR in sub-freezing temperatures is more...
Forum: RV-14 03-31-2021, 06:28 PM
Replies: 10
Views: 1,382
Posted By David Z
When there's a whole list of backordered parts,...

When there's a whole list of backordered parts, you can ask Vans to ship what they have.

I came up to the stage of the build where I needed two of the back ordered items and they happened to be...
Forum: RV Friends Who Have Passed On 03-31-2021, 06:18 PM
Replies: 62
Views: 12,636
Posted By David Z
For a Canadian Private license, spins are...

For a Canadian Private license, spins are demonstrated in training and stalls are a flight test item*.
For a Canadian Commercial license, spins are a flight test item*.

For what it's worth,...
Forum: RV Friends Who Have Passed On 03-31-2021, 10:13 AM
Replies: 62
Views: 12,636
Posted By David Z
Interesting tidbit about Airbus aerodynamic...

Interesting tidbit about Airbus aerodynamic stalls. In "normal law", Airbus aircraft have envelope protection where the fly-by-wire computers won't allow the aircraft to stall or overstress. Once...
Forum: RV Building Tips/Techniques 03-30-2021, 08:07 PM
Replies: 6
Views: 541
Posted By David Z
You're fine, it's not that critical. The VS spar...

You're fine, it's not that critical. The VS spar is pretty thick, it won't make a lick of difference.
Forum: Glass Cockpit 03-30-2021, 07:20 PM
Replies: 15
Views: 965
Posted By David Z
Call me old fashioned, but when the weather gets...

Call me old fashioned, but when the weather gets really soupy and we're near minimums, I'll pick the ILS over an LPV every day of the week. I'm also that weirdo that tunes the NDBs when flying around...
Forum: RV General Discussion/News 03-30-2021, 06:56 PM
Replies: 3
Views: 496
Posted By David Z
I butchered a part recently, and asked for some...

I butchered a part recently, and asked for some back-ordered fuselage parts to be shipped early. Both items took 10-14 days, and that included crossing the border. I also used USPS/Canada Post as the...
Forum: RV Friends Who Have Passed On 03-30-2021, 06:41 PM
Replies: 62
Views: 12,636
Posted By David Z
I'm quite curious how one could compare...

I'm quite curious how one could compare statistics of different types of pilots.
-Aerobatic pilots spend their time exploiting the edge of the flight envelope. Frequently crossing into stalled flight...
Forum: Close Calls / Lessons Learned 03-30-2021, 10:04 AM
Replies: 79
Views: 7,460
Posted By David Z
Hopefully the FAA sees the educational and safety...

Hopefully the FAA sees the educational and safety benefit to the international GA community by sharing this. There is, at present count, 955 views on this thread. Meaning 955 people who have learned...
Forum: ADS-B 03-30-2021, 06:57 AM
Replies: 22
Views: 2,512
Posted By David Z
That sounds like de-identified data. UAL 123 flew...

That sounds like de-identified data. UAL 123 flew from JFK to LAX on March 30th. I can't look up the address of the pilots and go say hello. You'd need access to United's crew scheduling department,...
Forum: RV models of the future (RV-??) 03-30-2021, 06:26 AM
Replies: 45
Views: 6,445
Posted By David Z
Tail dragger RV-10? One can dream :D

Tail dragger RV-10? One can dream :D
Forum: Close Calls / Lessons Learned 03-29-2021, 09:20 PM
Replies: 79
Views: 7,460
Posted By David Z
"Pilot Error"

I see in the video the poster blames pilot error. I don't like the term "pilot error", it's used as a "pilot did something dumb", and ends the analysis there. Lets start asking "why" as well. Why did...
Forum: RV-7/7A 03-29-2021, 08:27 PM
Replies: 18
Views: 1,402
Posted By David Z
I have flown both carbs and FI in various...

I have flown both carbs and FI in various different models. Each has slightly different idiosyncrasies that are easy to adapt to and handle. The real only no-go is inverted flight and a carb. The...
Forum: RV General Discussion/News 03-29-2021, 08:06 PM
Replies: 59
Views: 3,185
Posted By David Z
Transition

When I transition, it's usually from local altimeter setting to standard 29.92 after crossing into the standard pressure region at FL180 and above. Again on the way down, we transition to a local...
Forum: RV-10 03-28-2021, 07:35 PM
Replies: 4
Views: 821
Posted By David Z
Probably

Probably, but priming is easier. To apply alodine properly is quite the process and time consuming. Especially on big sheets like wing skins. It's also quite toxic and contains chemicals we all want...
Forum: RV General Discussion/News 03-28-2021, 06:10 PM
Replies: 18
Views: 1,332
Posted By David Z
I see a crack in the rib flange. Maybe it's just...

I see a crack in the rib flange. Maybe it's just the resolution, but sure looks like the flange is starting to separate. For the price of the rib, have it replaced.

Even if it is cracked, it's...
Forum: RV General Discussion/News 03-28-2021, 06:05 PM
Replies: 69
Views: 6,483
Posted By David Z
The "shelf" looks sturdy enough.

The "shelf" looks sturdy enough.
Forum: Primers 03-27-2021, 08:18 PM
Replies: 14
Views: 4,730
Posted By David Z
Probably a little late, but I tried the Zinc...

Probably a little late, but I tried the Zinc Phosphate. Neither here nor there, wasn't hugely impressed, but wasn't anything wrong with it either. My plane has different primer at every stage. Tail...
Forum: RV General Discussion/News 03-27-2021, 06:19 PM
Replies: 69
Views: 6,483
Posted By David Z
That's the real mystery. If true, that's a modern...

That's the real mystery. If true, that's a modern marvel. Do I put it on my popcorn? How long until it takes effect?

Being more serious, I've got about 1500hrs of piston time, 1000hrs of that is in...
Forum: RV General Discussion/News 03-27-2021, 08:38 AM
Replies: 46
Views: 7,163
Posted By David Z
Pretty sure there isn't a "lottery/sweepstakes"...

Pretty sure there isn't a "lottery/sweepstakes" tax in Canada. There is tax on large gifts such as automobiles, so the typical work-around is to "sell" the gift for $1.
Forum: Tools 03-25-2021, 08:43 PM
Replies: 8
Views: 913
Posted By David Z
You're all making me jealous. I have a 60+ year...

You're all making me jealous. I have a 60+ year old cracked concrete floor in my airplane factory. Shop vac, broom, and my shih tzu eats rocks out of the cracks in the concrete.
Forum: RV Building Tips/Techniques 03-25-2021, 08:19 PM
Replies: 11
Views: 676
Posted By David Z
Conduit Runs

This really should be included in the plans: https://www.vansaircraft.com/faq-technical-builder-items/wing-wiring-routing-wires-in-the-wings/
Forum: Alternative Engines 03-24-2021, 08:04 AM
Replies: 58
Views: 6,971
Posted By David Z
All of my experience around the R-985...

All of my experience around the R-985 (deHavilland Beaver), they are operated at 1900 to 2000rpm in cruise. This sounds like exactly why.

The neat stuff one learns on this site.

Now we just need to...
Forum: RV General Discussion/News 03-24-2021, 06:32 AM
Replies: 26
Views: 2,300
Posted By David Z
Alternatively go around and try again. Not...

Alternatively go around and try again. Not advocating one way or another, just different ways to skin the proverbial cat. Most pssengers hate skips because its a seemingly dramatic maneuver.

Edit:...
Forum: Traditional Aircraft Engines 03-22-2021, 04:09 AM
Replies: 12
Views: 1,802
Posted By David Z
I have wondered about higher compression ratios...

I have wondered about higher compression ratios at higher altitude. The altitude is reducing the amount of air available to compress.

For example, a fictitious engine's cylinder might take in 3 oz...
Forum: RV General Discussion/News 03-21-2021, 05:14 AM
Replies: 14
Views: 1,590
Posted By David Z
All the smart people with their knowledgeable...

All the smart people with their knowledgeable intelligent answers. The turbo flux capacitator getting too many quantum giggawatts at 88 miles per hour sounds more fun. Let us have fun with our...
Forum: RV General Discussion/News 03-20-2021, 05:59 PM
Replies: 17
Views: 1,230
Posted By David Z
Redundancy? If the brakes break, the tailwheel...

Redundancy?

If the brakes break, the tailwheel steers. If the steering linkages break, the brakes work. I realize sometimes both are needed though.

Say that 5 times fast :D
Forum: RV General Discussion/News 03-20-2021, 05:55 PM
Replies: 14
Views: 1,590
Posted By David Z
Must have installed a turbo encabulator. I sure...

Must have installed a turbo encabulator. I sure can't afford it.

https://youtu.be/Ac7G7xOG2Ag
Forum: RV General Discussion/News 03-19-2021, 03:10 PM
Replies: 26
Views: 1,732
Posted By David Z
I've had Zulu 2, tried Bose, and then got my Zulu...

I've had Zulu 2, tried Bose, and then got my Zulu 2s upgraded to Zulu 3 specs. The Bose was hard wired into a plane I flew on a contract, so used them pretty much exclusively for several months. The...
Forum: RV General Discussion/News 03-19-2021, 03:00 PM
Replies: 6
Views: 1,876
Posted By David Z
Thanks, I'll consider my "old" NAS1304 bolts to...

Thanks,
I'll consider my "old" NAS1304 bolts to be like a nice whiskey or a fine wine, that they've only gotten better with age.
Forum: RV General Discussion/News 03-18-2021, 06:34 PM
Replies: 6
Views: 1,876
Posted By David Z
Reviving an old thread, which makes this really...

Reviving an old thread, which makes this really weird.

My fuselage kit, circa 2020, was shipped with NAS1304-50. Last week I ordered some more of the same bolts (long story, don't ask). The ones...
Forum: RV Ongoing Maintenance Issues 03-18-2021, 06:41 AM
Replies: 9
Views: 1,005
Posted By David Z
All 2024, tubes and some angles are 6061. The...

All 2024, tubes and some angles are 6061. The skins, ribs, spars, bulkheads are all 2024.
Forum: RV General Discussion/News 03-17-2021, 08:55 PM
Replies: 14
Views: 1,588
Posted By David Z
What about those who fly planes that aren't named...

What about those who fly planes that aren't named after animals? Chipmunk, Beaver, Otter, Caribou, Buffalo, 2xOtter. Then they ran out of animals and went with -7, -8... Well I suppose the first 3...
Forum: Alternative Engines 03-17-2021, 07:30 PM
Replies: 58
Views: 6,971
Posted By David Z
While we're talking about hypothetical engines,...

While we're talking about hypothetical engines, lets put the S18 on a Rocket. The RV8 would fit the S14, two rows of 7 cylinders, a bit over 200hp will do quite well.
Forum: RV Building Tips/Techniques 03-17-2021, 07:15 PM
Replies: 57
Views: 4,667
Posted By David Z
Today I countersunk the wrong side of a small...

Today I countersunk the wrong side of a small part for the nut plates. :mad: Boy was I mad at myself.
Forum: RV General Discussion/News 03-17-2021, 07:09 PM
Replies: 228
Views: 93,931
Posted By David Z
Second Airplane Wish List

Still working on the first airplane, but one can dream eh?

RV8 is a great sport plane, but it's no family hauler. A Piper Navajo Panther conversion would be a great family hauler. I would want one...
Forum: Traditional Aircraft Engines 03-17-2021, 07:56 AM
Replies: 22
Views: 1,737
Posted By David Z
I think most people are way over complicating the...

I think most people are way over complicating the operation of these engines. There's very little we can do to actually hurt the engines. I had a boss who taught me to lean slightly for takeoff in a...
Forum: RV General Discussion/News 03-17-2021, 07:36 AM
Replies: 14
Views: 1,588
Posted By David Z
Price Depends on the cost of each aircraft and...

Price

Depends on the cost of each aircraft and what you're willing to spend after buying the plane. The 7a sounds like it needs some panel work. The 6a might need some engine work.

Is there a...
Forum: Propellers 03-16-2021, 09:21 PM
Replies: 40
Views: 4,694
Posted By David Z
Not long ago I was talking to Whirlwind about...

Not long ago I was talking to Whirlwind about that exact engine. The 330 series with 3 blades can handle the non-counterweighted IO-370/375 cranks. Having said that it's a beefy prop and...
Forum: Electrical Systems 03-15-2021, 09:03 PM
Replies: 25
Views: 3,458
Posted By David Z
Can you more closely define "arctic...

Can you more closely define "arctic temperatures"? While not real arctic cold, I plan to operate my aircraft to at least -30*c (-25*f), maybe colder, and would like to avoid as many cold weather...
Forum: Traditional Aircraft Engines 03-14-2021, 09:16 PM
Replies: 22
Views: 2,674
Posted By David Z
What is the design life of an RV airframe? I...

What is the design life of an RV airframe?

I know most things can be maintained forever, but at some point it's just not worth replacing internal structural bits. Spars, longerons, etc.
Forum: RV-9/9A 03-14-2021, 04:14 PM
Replies: 22
Views: 2,462
Posted By David Z
It can be easily converted. Convert the RV9 into...

It can be easily converted. Convert the RV9 into money, then convert the money into an RV7. :D
Forum: Alternative Engines 03-14-2021, 10:20 AM
Replies: 58
Views: 6,971
Posted By David Z
This project rates up pretty high on the "cool...

This project rates up pretty high on the "cool factor". I was following the original engine pretty closely.

I'd ask how performance was affected with the larger frontal area, but I suppose there...
Forum: Propellers 03-13-2021, 08:10 PM
Replies: 16
Views: 1,106
Posted By David Z
The angle valve engines usually have crankshaft...

The angle valve engines usually have crankshaft dampers (AKA counterweights) that lessen the beating on the prop.

There's threads on here about the Whirlwind 330 prop. From what I understand, it's...
Forum: RV General Discussion/News 03-13-2021, 06:27 AM
Replies: 6
Views: 586
Posted By David Z
I have seen it before on a certified aircraft. It...

I have seen it before on a certified aircraft. It was actually an aileron horn, similar to the rudder and elevators on our RVs. One big caviet, it was designed that way. Our planes are designed...
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