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Search: Posts Made By: DanH
Forum: RV General Discussion/News Today, 07:43 PM
Replies: 17
Views: 883
Posted By DanH
FWIW, quick experiment today...set 2400,...

FWIW, quick experiment today...set 2400, throttled for 65% at 3000 ft, leaned to peak EGT. Shutting down one ignition was all it took to push EGT from roughly 1450 to 1500.

Someone with SDS...
Forum: RV General Discussion/News Today, 08:30 AM
Replies: 71
Views: 18,499
Posted By DanH
Vic, more info needed if we are to offer more...

Vic, more info needed if we are to offer more than shotgun suggestions. Good photos of the installation with the upper cowl off can tell a lot. Use the little paperclip icon.
Forum: Electronic Ignition Systems Yesterday, 10:05 AM
Replies: 66
Views: 7,650
Posted By DanH
Insulated ring terminals should meet MS25036. ...

Insulated ring terminals should meet MS25036. There are similar milspecs for other connection styles and for uninsulated terminals.
Forum: RV General Discussion/News Yesterday, 09:42 AM
Replies: 17
Views: 883
Posted By DanH
Ahhh, split rubber or plastic tubing? "Pipe"...

Ahhh, split rubber or plastic tubing? "Pipe" suggests something different on this side of the pond.

With an open port, the P-mag would not advance from base timing at low altitude. With the engine...
Forum: RV General Discussion/News Yesterday, 06:23 AM
Replies: 17
Views: 883
Posted By DanH
Mike, I assume "a pipe had come off" means you...

Mike, I assume "a pipe had come off" means you had one leaking intake gasket. It would make little or no advance difference in cruise at WOT, as the deltaP across the leak would only be equal to...
Forum: RV-14 04-16-2021, 04:42 PM
Replies: 8
Views: 411
Posted By DanH
The CHTs are fine for cruise. Lower airspeed...

The CHTs are fine for cruise. Lower airspeed tells the tale in climb, resulting in higher CHT and oil temperature.

There is no "correct" EGT number. EGT on a non-turbo Lycoming is a reference, not...
Forum: RV-8/8A 04-16-2021, 06:17 AM
Replies: 23
Views: 2,593
Posted By DanH
Most 8's have the mushroom rear rudder pedals, so...

Most 8's have the mushroom rear rudder pedals, so it's easy to install an internal rudder trim....no aero drag, no additional mass aft of the hinge line, infinitely adjustable.

Drill a hole in the...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 04-15-2021, 04:17 PM
Replies: 0
Views: 165
Posted By DanH
Search Non-Functional

Just a little prod...can someone please fix the VAF search function? The entire database from 2010 to 2020 seems to be unavailable.
Forum: Alternative Engines 04-15-2021, 02:55 PM
Replies: 9
Views: 743
Posted By DanH
I too will raise a hand for Mark.

I too will raise a hand for Mark.
Forum: Electronic Ignition Systems 04-15-2021, 07:23 AM
Replies: 66
Views: 7,650
Posted By DanH
Those are awful splices. You can slide some...

Those are awful splices. You can slide some shrink tubing over them, but note how pulling the wire just splits the tube and stresses the wire across a 90 degree bend.

Want to be a builder? Time to...
Forum: RV General Discussion/News 04-15-2021, 06:36 AM
Replies: 19
Views: 966
Posted By DanH
Specific to the question, I'd say "Not possible"....

Specific to the question, I'd say "Not possible". A standard pump operates with two simple disk check valves. One or both might leak for a variety of reasons, with a loss of pumping efficiency due...
Forum: Traditional Aircraft Engines 04-14-2021, 11:37 AM
Replies: 9
Views: 355
Posted By DanH
Michel, the folks saying climb at a higher...

Michel, the folks saying climb at a higher airspeed are entirely correct. Dynamic pressure is the source of the pressure differential which forces cooling mass (air) down through the fins. ...
Forum: Electronic Ignition Systems 04-13-2021, 09:37 AM
Replies: 66
Views: 7,650
Posted By DanH
Nothing wrong with soldered connections, but does...

Nothing wrong with soldered connections, but does a P-mag offer a way to fixate the wires against vibration? If not, use the crimp caps, no solder.

Returning to the original, it's fascinating how...
Forum: VAF Classifieds (posts in here deleted after 30 days) 04-12-2021, 06:00 PM
Replies: 0
Views: 176
Posted By DanH
12 to 24 V Converters, Chargeguard Power Timers

Anyone need a 24V power supply? Meanwell SD-25A-24, input 9-18V DC, output 24V DC 1.1A. Have two, $10 each plus shipping.

Also two Nevis Chargeguards. Good way to wire an aux power supply,...
Forum: Traditional Aircraft Engines 04-12-2021, 07:25 AM
Replies: 2
Views: 335
Posted By DanH
I'm not aware of a choice from Lycoming, but I...

I'm not aware of a choice from Lycoming, but I suppose you could call Rosta Vernatherm. The actual temperature control device is a little cartridge inside the aluminum body, which is really just a...
Forum: Electronic Ignition Systems 04-12-2021, 07:19 AM
Replies: 66
Views: 7,650
Posted By DanH
I'll call it normal. High probability the minor...

I'll call it normal. High probability the minor spread (20F) is a normal function of the flow divider/nozzle relationship. You did not mention fuel flow at 15" MP, but I'll venture it wasn't much,...
Forum: RV Ongoing Maintenance Issues 04-07-2021, 07:51 AM
Replies: 16
Views: 827
Posted By DanH
It is possible. Assuming it is an AFP pump, past...

It is possible. Assuming it is an AFP pump, past reports of stuck poppet valves typically involved o-ring swelling with an earlier rubber compound and auto fuel. The OP is reporting this to be a...
Forum: ADS-B 04-06-2021, 08:49 PM
Replies: 23
Views: 2,332
Posted By DanH
Flying today, and MGM approach wasn't busy, so...

Flying today, and MGM approach wasn't busy, so experiment time.

Yes, it appears to be a ATC system latency issue, combined with an inability to tie an anonymous return to a subsequent or previous...
Forum: RV Ongoing Maintenance Issues 04-06-2021, 08:25 PM
Replies: 16
Views: 827
Posted By DanH
This thing has gotten way more complicated than...

This thing has gotten way more complicated than necessary.

The engine driven pump cannot generate pressure higher than its spring dictates. So, if the indicated pressure is significantly more than...
Forum: ADS-B 04-06-2021, 08:36 AM
Replies: 23
Views: 2,332
Posted By DanH
The quirk appears to relate to using anonymous...

The quirk appears to relate to using anonymous mode, unavailable with 1090ES. Not advantageous.
Forum: ADS-B 04-06-2021, 06:04 AM
Replies: 23
Views: 2,332
Posted By DanH
Thanks Dave, that makes sense. Sounds like I...

Thanks Dave, that makes sense. Sounds like I need to conduct an experiment next time it happens, by going back to 1200, turning the anonymous mode off, then getting a new squawk from the controller....
Forum: RV General Discussion/News 04-05-2021, 05:13 PM
Replies: 13
Views: 878
Posted By DanH
I tend to encourage markings and operational...

I tend to encourage markings and operational conventions recognizable to almost anyone transitioning from a Piper or Cessna.

That said, wait about 10 minutes, and a post will come along in which...
Forum: RV General Discussion/News 04-05-2021, 03:16 PM
Replies: 13
Views: 878
Posted By DanH
https://www.vansaircraft.com/wp-content/uploads/20...

https://www.vansaircraft.com/wp-content/uploads/2019/02/speeds.pdf

Blue Line
(Maneuvering speed. Maximum speed at which full control can be applied. Speed at which full elevator control would impose...
Forum: ADS-B 04-05-2021, 08:45 AM
Replies: 23
Views: 2,332
Posted By DanH
"Confirm you are not a flight of two."

I think we discussed this some time ago, but don't recall if there was an explanation.

Sometimes I contact an approach for a VFR arrival, they give me a squawk, and then come back with a request to...
Forum: RV Ongoing Maintenance Issues 04-05-2021, 06:19 AM
Replies: 6
Views: 792
Posted By DanH
When you're ready to refinish, slide a knife...

When you're ready to refinish, slide a knife blade up under a few of those chips. If the chip is thin, the backside is uniform gray or dark mustard, and they pop off the surface leaving bare glass,...
Forum: RV Ongoing Maintenance Issues 04-04-2021, 07:29 PM
Replies: 6
Views: 792
Posted By DanH
I think you're both right, sorta. $10 says it...

I think you're both right, sorta. $10 says it was sprayed with K200, or Featherfill, or similar polyester primer/surfacer.
Forum: RV General Discussion/News 04-02-2021, 07:12 AM
Replies: 62
Views: 5,160
Posted By DanH
Survey thread, no need for text. Just judging...

Survey thread, no need for text. Just judging the beer order. There will be real news soon.
Forum: RV General Discussion/News 04-01-2021, 11:20 AM
Replies: 62
Views: 5,160
Posted By DanH
Go to the ATC tower, walk west on Waukau to the...

Go to the ATC tower, walk west on Waukau to the third house just outside the gate.
Forum: RV General Discussion/News 03-30-2021, 08:39 AM
Replies: 69
Views: 6,538
Posted By DanH
Perhaps make it less likely lead salts would...

Perhaps make it less likely lead salts would stick to hard parts...the oil and solvent. Scavenge? Ummm...



We've seen the ingredient list. Which one would be a lead scavenger?
Forum: RV Friends Who Have Passed On 03-30-2021, 06:03 AM
Replies: 62
Views: 12,768
Posted By DanH
Everybody go to 5500 or so this weekend, slow to...

Everybody go to 5500 or so this weekend, slow to typical approach speed, drop the flaps, cut power, roll in, and pull for an approximation of a tight base to
final. Now do it again with 5 less...
Forum: RV-9/9A 03-30-2021, 05:49 AM
Replies: 18
Views: 2,911
Posted By DanH
And now for a short public service...

And now for a short public service announcement:

Don't monkey around with fuel system design.*

Thank you.
Forum: RV-8/8A 03-29-2021, 04:09 PM
Replies: 10
Views: 1,041
Posted By DanH
One piece, and while you're at it, get rid of the...

One piece, and while you're at it, get rid of the useless hinge.
.
Forum: RV General Discussion/News 03-29-2021, 10:18 AM
Replies: 69
Views: 6,538
Posted By DanH
I know you're not serious, so this is just for...

I know you're not serious, so this is just for the Darwin Award candidates...

The tricresyl phosphate in MMO will make you walk funny.

Look up "jake walk", "jake leg", and similar.
Forum: RV General Discussion/News 03-28-2021, 07:47 AM
Replies: 69
Views: 6,538
Posted By DanH
No mystery. Just look up the MSDS, or read the...

No mystery. Just look up the MSDS, or read the Wiki page:

Petroleum Distillates (Hydrotreated Heavy Naphthenic) 60-100%
Petroleum Distillates (Stoddard Solvent) 10-30%
Tricresyl Phosphate ...
Forum: RV General Discussion/News 03-27-2021, 10:14 PM
Replies: 56
Views: 8,804
Posted By DanH
None of this is theoretical for me, as I won a...

None of this is theoretical for me, as I won a similar drawing in 2006. It's taxed as regular income, both federal and state. The total tax bill was about $86K on a $200K valuation. Further, I...
Forum: Alternative Engines 03-27-2021, 06:33 PM
Replies: 58
Views: 7,035
Posted By DanH
Brian, it's a new day...photo hosting right here...

Brian, it's a new day...photo hosting right here on the VAF servers. Just click the little bitty paperclip icon above the "Reply To Thread" screen and post photos, easy as pie.
Forum: Traditional Aircraft Engines 03-27-2021, 06:10 AM
Replies: 5
Views: 530
Posted By DanH
CHT low across the board. EGT erratic, low at...

CHT low across the board. EGT erratic, low at part power, higher than the rest at high power.

I'll venture one bad plug, plug wire, connector etc, or simply fouled. The high EGT under power...
Forum: RV-10 03-26-2021, 08:55 PM
Replies: 22
Views: 1,330
Posted By DanH
Optionitis (op-shun-i-tus) 1. A disease of...

Optionitis

(op-shun-i-tus)

1. A disease of homebuilt airplane builders, characterized by endless rationalization. Secondary symptoms include (a) slow build progress, (b) self-doubt, (c)...
Forum: RV-7/7A 03-26-2021, 11:27 AM
Replies: 34
Views: 2,157
Posted By DanH
Sam, you are the good pilot based at the very...

Sam, you are the good pilot based at the very fine airport. That's mighty real in my book.

Then there's the big dummies like me, trying be a hero and do a STOL arrival on this displaced threshold,...
Forum: RV-7/7A 03-26-2021, 07:15 AM
Replies: 34
Views: 2,157
Posted By DanH
Opinions vary, so let's move to fact. Landing...

Opinions vary, so let's move to fact.

Landing gears are generally designed for a 500 FPM arrival, which depending on leg design and other factors, is generally a bit over 3 G's. We want all the...
Forum: VAF Classifieds (posts in here deleted after 30 days) 03-25-2021, 05:57 PM
Replies: 1
Views: 785
Posted By DanH
Pair of Tailwheel Trainers

Two of my friends here at 08A are calling it quits, so there are two nice tailwheel time builders available...a Legend Cub, and a decent Aeronca Chief. They're not RV's, so I'll not list all the...
Forum: Alternative Engines 03-25-2021, 07:21 AM
Replies: 58
Views: 7,035
Posted By DanH
Bit 'o thread drift here, and I'm guilty as any. ...

Bit 'o thread drift here, and I'm guilty as any. Torsional vibration is a subject more homebuilders should contemplate, in particular those who want to fly alternative engines. However, it is a...
Forum: Alternative Engines 03-25-2021, 05:15 AM
Replies: 58
Views: 7,035
Posted By DanH
Fundamental frequency, first natural frequency,...

Fundamental frequency, first natural frequency, lowest vibratory mode. Different users may notate it otherwise, but here's the picture.

Aircraft propeller mass moment of inertia is almost always...
Forum: RV-12/RV-12iS 03-25-2021, 04:36 AM
Replies: 27
Views: 3,180
Posted By DanH
Curiouser and curiouser. I think the question...

Curiouser and curiouser.

I think the question here is why you're getting cracks and paint damage under nylon washers and AN526 screws. It's not the washer and screw choice, which are structurally...
Forum: Alternative Engines 03-24-2021, 01:25 PM
Replies: 58
Views: 7,035
Posted By DanH
Terry, I don't know. It was a long time ago. As...

Terry, I don't know. It was a long time ago. As you probably know, the Air University Library is on Maxwell AFB, and civilian access requires an active duty sponsor. I wasn't sure if I could...
Forum: Alternative Engines 03-24-2021, 09:27 AM
Replies: 58
Views: 7,035
Posted By DanH
Probably above the resonant intersection, as it...

Probably above the resonant intersection, as it would be with the Wasp Jr example.

The Russians, on the other hand, tend towards, um, stout. When doing the fixed pitch shaft for the M14, I tried...
Forum: Alternative Engines 03-24-2021, 07:44 AM
Replies: 58
Views: 7,035
Posted By DanH
Another nice illustration of an intersection of...

Another nice illustration of an intersection of system F1 and the 9th order, at about 1600 RPM with a Wasp Jr, here noted via propeller stress measurements. A Campbell diagram like the one in the...
Forum: Alternative Engines 03-24-2021, 07:33 AM
Replies: 58
Views: 7,035
Posted By DanH
For a 9 cyl single row, the primary contributors...

For a 9 cyl single row, the primary contributors are the 4.5 and 9th orders. The 4.5 order tends to be below the practical running range, but the 9th can be problematical, as it tends to intersect...
Forum: RV General Discussion/News 03-23-2021, 08:32 AM
Replies: 5
Views: 763
Posted By DanH
Good Writing

From the May issue of Air and Space, in an article by Paul Glenshaw...

The quote is from Richard Harding Davis, a famed reporter who flew with Wright exhibition pilot Frank Coffyn in 1911. Although...
Forum: Traditional Aircraft Engines 03-23-2021, 07:59 AM
Replies: 22
Views: 2,379
Posted By DanH
Sorry Brian, missed your reply a week or more...

Sorry Brian, missed your reply a week or more ago.

The key is to arrange hoses so there is no torque which can unscrew a fitting. Put another way, so no hose can be the handle of the wrench.

So,...
Forum: RV General Discussion/News 03-22-2021, 03:28 PM
Replies: 26
Views: 2,327
Posted By DanH
...but don't forget to select the uphill tank if...

...but don't forget to select the uphill tank if you plan a long slip.
Forum: Primers 03-22-2021, 06:52 AM
Replies: 6
Views: 733
Posted By DanH
Nope. In general, during construction you only...

Nope.

In general, during construction you only want to primer (if you primer) those parts which will not subsequently get a color coat...mostly hidden stuff and between parts.

Why? Most of the...
Forum: Tools 03-18-2021, 08:45 AM
Replies: 27
Views: 1,511
Posted By DanH
Short answer, no.

Short answer, no.
Forum: RV-4 03-17-2021, 12:51 PM
Replies: 505
Views: 347,989
Posted By DanH
Those are very some shapely diffusers. I bow to...

Those are very some shapely diffusers. I bow to Axel the Artisan!



Rubbery. Temperature depends epoxy formulation and post cure.
Forum: Traditional Aircraft Engines 03-17-2021, 11:00 AM
Replies: 22
Views: 1,762
Posted By DanH
Completely agree...at stock compression and...

Completely agree...at stock compression and ignition timing.
Forum: RV Building Tips/Techniques 03-17-2021, 10:55 AM
Replies: 31
Views: 2,048
Posted By DanH
Agree. It seems to form a hexagonal epoxy...

Agree. It seems to form a hexagonal epoxy honeycomb when infused. Finished product is heavier than paper honeycomb by a lot, but that doesn't matter much for an oil door. Definitely a lot more...
Forum: Fiberglass 03-16-2021, 03:29 PM
Replies: 3
Views: 477
Posted By DanH
OAT plus a few degrees in flight. Air temp at...

OAT plus a few degrees in flight.

Air temp at 220F is possible after shutdown on a hot day...but there is no structural load then. I think a plenum lid would cool very quickly as structural load...
Forum: Fiberglass 03-16-2021, 02:41 PM
Replies: 3
Views: 477
Posted By DanH
West 105/206 has a relatively low Tg (glass...

West 105/206 has a relatively low Tg (glass transition temperature), the point at which the solid resin starts acting like rubber. Doesn't mean you can't use it. Just don't expect the part to be...
Forum: Alternative Engines 03-16-2021, 12:29 PM
Replies: 58
Views: 7,035
Posted By DanH
Photo from EAA Sport Aviation, October 2016. -

Photo from EAA Sport Aviation, October 2016.
-
Forum: Alternative Engines 03-16-2021, 09:47 AM
Replies: 58
Views: 7,035
Posted By DanH
Technically, no. Again, torque is only a force. ...

Technically, no. Again, torque is only a force. Force x distance ("how far you'll move it") = work. Common terms would be Joules or ft-lbsf.

Let's not get too far afield here. Subject is a...
Forum: Alternative Engines 03-15-2021, 09:43 AM
Replies: 58
Views: 7,035
Posted By DanH
Torque is a force. Power is the rate at which...

Torque is a force. Power is the rate at which work is done.

Horsepower is torque x RPM divided by a constant (5252). More torque at less RPM is the same as less torque at more RPM. For...
Forum: RV-4 03-15-2021, 09:05 AM
Replies: 505
Views: 347,989
Posted By DanH
Done before, flown 10 years, holds up fine, stays...

Done before, flown 10 years, holds up fine, stays put, peels easily if desired. Think of it as a gasket which doesn't allow leakage out the side of the aluminum wraps. We want the air to go all the...
Forum: RV-4 03-15-2021, 06:30 AM
Replies: 11
Views: 1,012
Posted By DanH
6-2, 34 inseam, size 14 shoes, and I simply do...

6-2, 34 inseam, size 14 shoes, and I simply do not fit in any -4 I've yet tried.
Forum: RV General Discussion/News 03-13-2021, 05:07 AM
Replies: 6
Views: 591
Posted By DanH
For clarity, a sketch of what I think Ed...

For clarity, a sketch of what I think Ed proposed...essentially an extended aileron.
.
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