VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Search Forums
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 64 of 500
Search took 0.07 seconds.
Search: Posts Made By: DanH
Forum: RV General Discussion/News 11-29-2022, 01:34 PM
Replies: 55
Views: 4,737
Posted By DanH
What if this had been J-3? It's not a crazy...

What if this had been J-3?

It's not a crazy thought. The subject RV is carbed, with mags...no electrical requirement, same as the Cub. Plenty of fuel, more than the Cub. Weather broken or better,...
Forum: Alternative Engines 11-29-2022, 08:28 AM
Replies: 64
Views: 6,819
Posted By DanH
Section changes are obviously bad practice. ...

Section changes are obviously bad practice. However, consider the torsional load on that free-standing lobe. Think of the pin as the handle of a wrench.

Real analysis would be best, but if it has...
Forum: RV Ongoing Maintenance Issues 11-28-2022, 05:17 PM
Replies: 25
Views: 1,697
Posted By DanH
My note to Shorai and the...

My note to Shorai and the response:
____________________________________________

I note a competitor claiming their LiFePO battery incorporates internal cell balancing, and others do not. I am...
Forum: Fuel Injection Systems 11-28-2022, 10:24 AM
Replies: 11
Views: 456
Posted By DanH
Same as the 360A. Ask Ron Moring about enlarging...

Same as the 360A. Ask Ron Moring about enlarging the flange. Apparently it can be increased enough to eliminate the adapter normally used to mount an FM-200, bore size 3-1/16". May not be able to...
Forum: Electronic Ignition Systems 11-28-2022, 08:37 AM
Replies: 22
Views: 1,138
Posted By DanH
Nope. On the ground it will sound and run just...

Nope. On the ground it will sound and run just fine with advance in the 40's. At full throttle it may detonate, depending on conditions. However, even then it won't sound or run much different,...
Forum: Fuel Injection Systems 11-28-2022, 07:10 AM
Replies: 11
Views: 456
Posted By DanH
The standard horizontal sump should be 2-5/16",...

The standard horizontal sump should be 2-5/16", like the RSA-5. The "cold air" manifold on the 390C and D is sized for an RSA-10.
Forum: Electronic Ignition Systems 11-27-2022, 01:39 PM
Replies: 22
Views: 1,138
Posted By DanH
Different system, same move. Timing advance...

Different system, same move. Timing advance schedule below is for an angle valve. I don't know what sort of MAP sensor is on the board of the Autosport Labs timing control device I use, but the...
Forum: Primers 11-27-2022, 01:19 PM
Replies: 15
Views: 1,017
Posted By DanH
Bead blasting sheet aluminum tends to make it...

Bead blasting sheet aluminum tends to make it warp, and it removes the pure aluminum layer on alclad. Don't do it.
Forum: Electronic Ignition Systems 11-27-2022, 10:09 AM
Replies: 22
Views: 1,138
Posted By DanH
I seem to recall at least one case of a failed...

I seem to recall at least one case of a failed MAP sensor resulting in timing advance at high manifold pressure. Card, RV-9? It's here somewhere.

Anyway, with the manifold pressure sensor hose...
Forum: Fuel Injection Systems 11-27-2022, 07:34 AM
Replies: 11
Views: 456
Posted By DanH
RSA-5 and FM150 bore diameter at the throttle...

RSA-5 and FM150 bore diameter at the throttle plate and manifold flange is 2.3125"

RSA-10 is 3.4375"

An FM-200, as used on the 390-119, is 3.0625"

The RSA series has a significant bore reduction...
Forum: RV Ongoing Maintenance Issues 11-26-2022, 07:13 PM
Replies: 25
Views: 1,697
Posted By DanH
The "how" is probably simple charge limiting. I...

The "how" is probably simple charge limiting. I have a note out to Shorai.
Forum: Electronic Ignition Systems 11-26-2022, 07:16 AM
Replies: 22
Views: 1,138
Posted By DanH
I'm with Warren. Leave it alone and be happy. ...

I'm with Warren. Leave it alone and be happy. If we base on Nigel Speedy's data using a parallel valve 360, the base timing retard will result in lower CHT with no practical performance difference...
Forum: Traditional Aircraft Engines 11-26-2022, 06:51 AM
Replies: 21
Views: 1,054
Posted By DanH
Before we go, return to the photo from post...

Before we go, return to the photo from post #4



Is the circled fitting an elbow, or a tee?

If an elbow, and connected to a return line, all the return flow would be passing through the Bendix...
Forum: RV Ongoing Maintenance Issues 11-25-2022, 12:53 PM
Replies: 25
Views: 1,697
Posted By DanH
I'm speaking of cell balancing, the subject of...

I'm speaking of cell balancing, the subject of the referenced EarthX note, not over-voltage protection, the issue resulting in battery melt and smoke.

Are there any LiFePO batteries without active...
Forum: RV Ongoing Maintenance Issues 11-25-2022, 10:21 AM
Replies: 21
Views: 2,578
Posted By DanH
Or not...;)

Or not...;)
Forum: Traditional Aircraft Engines 11-25-2022, 10:16 AM
Replies: 21
Views: 1,054
Posted By DanH
No. The subject is a return connected near the...

No. The subject is a return connected near the servo inlet.



Strictly an aside, but there are only two practical ways an operator can raise nozzle pressure...advance the throttle, or change the...
Forum: RV-14 11-25-2022, 09:51 AM
Replies: 4
Views: 583
Posted By DanH
Primarily fixed exit area (early) vs fixed plus...

Primarily fixed exit area (early) vs fixed plus variable (119).



119 snorkel was re-shaped and flows better, and fits an FM-200.



Don't know, but probably unused mount lugs. Common to cut them...
Forum: Electronic Ignition Systems 11-25-2022, 09:00 AM
Replies: 22
Views: 1,138
Posted By DanH
Typically we tap MP by screwing a restricted...

Typically we tap MP by screwing a restricted fitting into one of the unused cylinder primer ports. The restrictor (1) serves to minimize the intake leak if the MP line becomes disconnected, and (2)...
Forum: RV Ongoing Maintenance Issues 11-25-2022, 08:50 AM
Replies: 25
Views: 1,697
Posted By DanH
Seriously, is there any automotive or aircraft...

Seriously, is there any automotive or aircraft LiFePO battery without internal cell management?
Forum: Traditional Aircraft Engines 11-25-2022, 08:25 AM
Replies: 21
Views: 1,054
Posted By DanH
Ahh. A classic PWM port injection has a...

Ahh.

A classic PWM port injection has a pressure regulator in the return flow path. The regulator holds the injector supply at a specific pressure above atmospheric regardless of engine demand. ...
Forum: Traditional Aircraft Engines 11-24-2022, 09:40 PM
Replies: 21
Views: 1,054
Posted By DanH
This isn't black or white. More a matter of...

This isn't black or white. More a matter of carefully considered compromise.

Let's start by asking "What is its intended purpose?"

Is there something special about your application which makes it...
Forum: Traditional Aircraft Engines 11-24-2022, 04:12 PM
Replies: 21
Views: 1,054
Posted By DanH
IF you want a constant flow return line tee'd to...

IF you want a constant flow return line tee'd to the inlet fitting for a Bendix-style fuel control, yes, it needs a restrictor. The minimum supply pressure for an RSA-5 is about 20 psi at WOT full...
Forum: RV Ongoing Maintenance Issues 11-24-2022, 11:24 AM
Replies: 8
Views: 494
Posted By DanH
The slosh compound is a problem. Best I know, you...

The slosh compound is a problem. Best I know, you can't use proseal over it. I have removed slosh from older composite Kitfox tanks with MEK and a stiff brush, but it ain't fun.

Offhand I don't...
Forum: Traditional Aircraft Engines 11-23-2022, 06:57 AM
Replies: 21
Views: 1,054
Posted By DanH
Which system are you guys discussing?

Which system are you guys discussing?
Forum: RV-10 11-23-2022, 06:53 AM
Replies: 19
Views: 1,089
Posted By DanH
Yes, SS rivets, 5/32 IIRC. Elevators balanced...

Yes, SS rivets, 5/32 IIRC. Elevators balanced individually.
Forum: RV-10 11-22-2022, 07:33 PM
Replies: 19
Views: 1,089
Posted By DanH
https://vansairforce.net/community/showpost.php?p=...

https://vansairforce.net/community/showpost.php?p=1592950&postcount=28
Forum: GPS 11-20-2022, 01:17 PM
Replies: 11
Views: 1,182
Posted By DanH
Follow up....I wedged a small bit of foam in...

Follow up....I wedged a small bit of foam in beside the inserted plug to wedge it firmly to the side which always had communication. Worked all year like that. I'm sure it's simply pushing...
Forum: Painting your RV 11-19-2022, 08:03 PM
Replies: 5
Views: 456
Posted By DanH
Where is Don? Calling...

Where is Don? Calling Don...

http://www.deltapopaviation.com/Home.html
Forum: RV Ongoing Maintenance Issues 11-18-2022, 09:38 AM
Replies: 53
Views: 23,303
Posted By DanH
Trouble is, the Flamemaster guy said the same...

Trouble is, the Flamemaster guy said the same thing.
Forum: RV Building Tips/Techniques 11-17-2022, 01:55 PM
Replies: 6
Views: 507
Posted By DanH
There is no truly safe insulation for the cabin...

There is no truly safe insulation for the cabin side of the firewall....and it doesn't work very well anyway. It's like wearing your underpants over your jeans and expecting skidmark prevention. ...
Forum: Propellers 11-17-2022, 12:19 AM
Replies: 43
Views: 2,512
Posted By DanH
C-1576 drawing below. As static friction is...

C-1576 drawing below. As static friction is typically higher than dynamic friction, the mechanical damping function (silicone grommets in parallel with friction damping) would only come into play...
Forum: Virtual Hangar 11-15-2022, 11:54 AM
Replies: 239
Views: 123,564
Posted By DanH
Brian, good to hear from you. What have you...

Brian, good to hear from you.

What have you been doing? Still making beautiful beans at the day job? ;)
Forum: Alternative Engines 11-15-2022, 09:17 AM
Replies: 64
Views: 6,819
Posted By DanH
Keith, suggest you consider natural rubber...

Keith, suggest you consider natural rubber torsional couplers made specifically for this sort of application. Lovejoy Centaflex is a personal favorite, but there are other couplers in various...
Forum: Propellers 11-14-2022, 05:17 PM
Replies: 43
Views: 2,512
Posted By DanH
Steve, great comments. Absolutely, for the...

Steve, great comments.



Absolutely, for the same reason that placing a damper at a node is ineffective.



Traded a note with Les Dowd today, and will follow up with another engineer. The...
Forum: Fiberglass 11-14-2022, 04:53 PM
Replies: 11
Views: 1,055
Posted By DanH
Photo illustrates what Steve said about using...

Photo illustrates what Steve said about using several layers of flannel. Depending on how wet the layups are, it's possible to squeeze a lot of epoxy into the bleeder ply. The shiny areas are fully...
Forum: Propellers 11-14-2022, 11:37 AM
Replies: 43
Views: 2,512
Posted By DanH
I am a fan of old SAE and NACA papers, in...

I am a fan of old SAE and NACA papers, in particular the pre-WWII years, the golden age of piston aircraft engine development. They tend to be written in plain language, in an era when it was all...
Forum: Fiberglass 11-14-2022, 10:58 AM
Replies: 11
Views: 1,055
Posted By DanH
For simple "at home" work I use... A vacuum pump...

For simple "at home" work I use...

A vacuum pump from some unknown machine dumped at my buddy's junkyard

Pink foam for forms, epoxy shelled or with a ply of glass for surface durability

HD garbage...
Forum: Propellers 11-14-2022, 10:32 AM
Replies: 5
Views: 460
Posted By DanH
I suspect we need only be patient. I have no...

I suspect we need only be patient. I have no inside info, but I do note they called this document "Volume 1"
Forum: Propellers 11-14-2022, 09:14 AM
Replies: 5
Views: 460
Posted By DanH
Hartzell Information Manual for Experimental Aircraft

Hartzell has released a document dedicated to propeller vibration compatibility. Apparently it is new, with a cover notation of "Original September 2022".

It lists all the currently approved...
Forum: RV Building Tips/Techniques 11-13-2022, 04:53 PM
Replies: 21
Views: 2,360
Posted By DanH
Those inlets are a nice piece of work. My...

Those inlets are a nice piece of work. My compliments sir.
Forum: Propellers 11-13-2022, 10:52 AM
Replies: 43
Views: 2,512
Posted By DanH
Hartzell C-1576. Appears to be little more than...

Hartzell C-1576. Appears to be little more than a mass ring in the limited photos I find on the net. Anyone have an exploded diagram?
Forum: Propellers 11-13-2022, 09:05 AM
Replies: 43
Views: 2,512
Posted By DanH
Mike, got a link to the STC information? "Like...

Mike, got a link to the STC information?



"Like a willow" is perhaps an excessive visualization. Strictly opinion, but I base it on having spent time around spinning props with a powerful variable...
Forum: Propellers 11-13-2022, 08:26 AM
Replies: 43
Views: 2,512
Posted By DanH
An accurate model of an engine-propeller system...

An accurate model of an engine-propeller system does incorporate blade root stiffness as well as the torsional stiffness of shafts and shaft equivalents. The FEA models now used in industry are...
Forum: Propellers 11-12-2022, 08:30 AM
Replies: 43
Views: 2,512
Posted By DanH
Obviously yes, assuming a shaft extension exists...

Obviously yes, assuming a shaft extension exists in a particular installation.

However, the question becomes "How stiff is it?". To see the reality, it's necessary to quantify, because we're...
Forum: Autopilots 11-11-2022, 11:37 PM
Replies: 9
Views: 461
Posted By DanH
Cool. Just covering the bases. When it kicks...

Cool. Just covering the bases.

When it kicks off, does the indicator actually display the legend "Excessive G" or something similar? I ask because just for fun, let's assume there is nothing...
Forum: Propellers 11-11-2022, 11:26 PM
Replies: 43
Views: 2,512
Posted By DanH
As there is no connecting stiffness between the...

As there is no connecting stiffness between the Landoll's inertia and the prop hub inertia, the effective result is an increase in prop inertia...making it more like the metal prop.
Forum: Propellers 11-11-2022, 11:04 PM
Replies: 43
Views: 2,512
Posted By DanH
Break the prop. Note pendulum absorbers are...

Break the prop.



Note pendulum absorbers are tuned to a specific order rather than a frequency.



In this specific application, it's more likely simply acting as a flywheel mass, as its location...
Forum: Autopilots 11-11-2022, 06:50 AM
Replies: 9
Views: 461
Posted By DanH
Dennis, the control box must be mounted with a...

Dennis, the control box must be mounted with a specific orientation. Should be a sticker or something indicating up and forward.

The servo reversal reset happens if the unit is powered on during...
Forum: RV Building Tips/Techniques 11-09-2022, 06:43 PM
Replies: 21
Views: 2,360
Posted By DanH
Sean, that design looks like it would seal well...

Sean, that design looks like it would seal well with simple strip seals...like a stock lower seal and a mirror copy on the top cowl. They get attached to the backside of the cowl flanges and overlap...
Forum: Fiberglass 11-07-2022, 06:33 AM
Replies: 11
Views: 1,069
Posted By DanH
Scrap aircraft fabric, generally free from the...

Scrap aircraft fabric, generally free from the guy on your airport who recovered his airplane. Unsized polyester.
Forum: RV-8/8A 11-02-2022, 07:33 AM
Replies: 17
Poll: RV-8 Carpet?
Views: 1,342
Posted By DanH
The standard is 2000F over 25 sq inches, with a...

The standard is 2000F over 25 sq inches, with a specified heat flux. The old test used an oil burner which is no longer available, so the FAA is going over to propane. However, unlike fuel oil, the...
Forum: RV-8/8A 11-01-2022, 03:07 PM
Replies: 17
Poll: RV-8 Carpet?
Views: 1,342
Posted By DanH
Luke, take a look at post 14 in a thread called...

Luke, take a look at post 14 in a thread called "Firewall kits -beta". There's a picture of the setup and a temperature plot.

"Target" is a proxy for objects on the cabin side of a firewall, but...
Forum: RV-8/8A 11-01-2022, 11:40 AM
Replies: 17
Poll: RV-8 Carpet?
Views: 1,342
Posted By DanH
FAR 25.853 is applicable for materials located...

FAR 25.853 is applicable for materials located well away from a powerplant firewall. 853 materials are not fireproof. They are merely expected to self extinguish after the heat source is removed. ...
Forum: RV-7/7A 10-31-2022, 07:25 PM
Replies: 2,061
Views: 1,576,690
Posted By DanH
No faintness of heart when you're only half-smart...

No faintness of heart when you're only half-smart ;)
Forum: RV-7/7A 10-31-2022, 06:20 PM
Replies: 2,061
Views: 1,576,690
Posted By DanH
Horton Aircraft Deconstruction Service..."State...

Horton Aircraft Deconstruction Service..."State of the Art in Takin' Apart"
.
Forum: Painting your RV 10-31-2022, 08:30 AM
Replies: 30
Views: 3,028
Posted By DanH
Now that's funny ;) There are quite a few...

Now that's funny ;)



There are quite a few scholarly papers out there regarding oxidation of aluminum. In a quick scan, they all seem to say the initial rate of oxide formation is very fast, but...
Forum: RV-14 10-28-2022, 12:24 PM
Replies: 14
Views: 2,482
Posted By DanH
The OP was reporting over-tightening of the...

The OP was reporting over-tightening of the B-nuts, not the brass body into the cylinder head.
Forum: RV-7/7A 10-27-2022, 08:23 PM
Replies: 20
Views: 1,846
Posted By DanH
There is no data to address the question. I...

There is no data to address the question. I doubt there ever will be. NTSB reports focus on the primary cause, and rarely go into any depth about subsequent failures.

Here's a good example. The...
Forum: Probable Cause Documents Discussed 10-26-2022, 06:47 PM
Replies: 33
Views: 5,051
Posted By DanH
Here's an example. Lower right motor mount...

Here's an example. Lower right motor mount weldment for an RV-7. Those rivet holes are not supposed the be countersunk, much less countersunk to a knife edge.

Impossible to find in a prebuy. It...
Forum: RV-14 10-26-2022, 06:31 PM
Replies: 12
Views: 2,546
Posted By DanH
It's what the math says. See "Speaking Truth To...

It's what the math says. See "Speaking Truth To Power" at the end of this article:

https://www.kitplanes.com/vans-rv-14a/
Forum: RV Building Tips/Techniques 10-26-2022, 12:29 PM
Replies: 19
Views: 1,074
Posted By DanH
Leaks are cumulative. A little here, a little...

Leaks are cumulative. A little here, a little there..

The finning on the angle valve engines will let you get away with murder...CHT will fall in the acceptable range, even if higher than other...
Forum: RV-7/7A 10-26-2022, 09:49 AM
Replies: 20
Views: 1,846
Posted By DanH
Caution, Will Robinson.... The home stores sell...

Caution, Will Robinson....

The home stores sell 3M "IC 15WB+ Fire Barrier" and 3M "CP 25WB+ Fire Barrier" caulks. These are latex products, not silicone, and are only rated for max service...
Forum: RV-14 10-26-2022, 09:33 AM
Replies: 12
Views: 2,546
Posted By DanH
The open vs closed difference was 3 MPH (2.6...

The open vs closed difference was 3 MPH (2.6 knots) when Marc Cook flew the -119 version RV-14 with Greg.



Bill's configuration remains an oddity; it has no significant lower cowl pressure. Can't...
Forum: RV-7/7A 10-26-2022, 09:03 AM
Replies: 20
Views: 1,846
Posted By DanH
The classic approach for rubber grommets is a...

The classic approach for rubber grommets is a stainless steel shield. Example:

https://www.aircraftspruce.com/catalog/appages/firewallshields3.php?clickkey=190107

A tiny quantity of any high...
Showing results 1 to 64 of 500

 
Forum Jump

All times are GMT -6. The time now is 07:31 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.