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Search: Posts Made By: Freemasm
Forum: Electrical Systems 11-30-2021, 10:33 AM
Replies: 30
Views: 1,121
Posted By Freemasm
Multi-meter suggestions

I have a Tandy/Radio Shack digital MM I've used since the late 80's. It has handled the abuse from me for decades but the display backlight is out and unreadable in most environments. I've had a...
Forum: RV Building Tips/Techniques 11-24-2021, 07:54 AM
Replies: 11
Views: 1,343
Posted By Freemasm
Cheap insurance

In addition to 1097s, get some 1241ís from FlyBoy accessories or elsewhere. 3s and 4s that are 1/64Ē larger each. Some will probably argue that the Oversize rivet dims arenít far off from each...
Forum: RV Building Tips/Techniques 11-23-2021, 02:22 PM
Replies: 12
Views: 1,167
Posted By Freemasm
All of the ďworkaroundsĒ are probably great for...

All of the ďworkaroundsĒ are probably great for new PP constructions. There will be times when thatís not practical for reworks, mods, earlier kit construction, etc. Of course, itís personal; your...
Forum: Rocket 11-22-2021, 03:46 PM
Replies: 3
Views: 393
Posted By Freemasm
Flap/ Fuse interface

Surely someone will chime in telling me I did something wrong. All is good.

Background = Fabbed a second set of flaps. First set was per drawing and not such a good fit. Second set was basically a...
Forum: RV Building Tips/Techniques 11-21-2021, 06:06 PM
Replies: 12
Views: 1,167
Posted By Freemasm
No desire to start a debate with DavidZ. Everyone...

No desire to start a debate with DavidZ. Everyone gets to build they way they choose; however:

Thereís a lot of slop (tolerance) in a screw/bolt hole. More if you donít engage all the way to the...
Forum: RV Building Tips/Techniques 11-20-2021, 01:59 PM
Replies: 12
Views: 1,167
Posted By Freemasm
Donít stop there.

6 thru 1/4
One and two lug styles

Trying to save a few dollars on tools most always comes back to bite me. Yard store is a great place to do business with.
Forum: RV Ongoing Maintenance Issues 11-18-2021, 09:06 AM
Replies: 22
Views: 2,421
Posted By Freemasm
Supports the observation and theory: Shimmy =>...

Supports the observation and theory:

Shimmy => cycles => metal fatigue

Sounds like there's plenty of options to make this avoidable.
Forum: RV Ongoing Maintenance Issues 11-18-2021, 08:16 AM
Replies: 12
Views: 1,387
Posted By Freemasm
There's no reason to address the anecdotal data;...

There's no reason to address the anecdotal data; you mention a single data point in a population that experiences a lot of variables. Plus, I framed it in the "accepted or tribal knowledge" category...
Forum: RV Ongoing Maintenance Issues 11-18-2021, 07:17 AM
Replies: 22
Views: 2,421
Posted By Freemasm
I can't tell for sure from the posted pic but the...

I can't tell for sure from the posted pic but the shape of the fracture surface and apparent lack of necking, etc. would suggest fatigue. Possible overstress but I'm doubting based on the one pic. If...
Forum: RV Ongoing Maintenance Issues 11-18-2021, 07:02 AM
Replies: 12
Views: 1,387
Posted By Freemasm
Just some anecdote to add to the convo

It was pretty common in Mooney world to swap top and bottom isolators or rotate in place when the sag got noticeable. They were symmetrical/omnidirectional so orientation didn't matter. I have no...
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-15-2021, 02:10 PM
Replies: 6
Views: 473
Posted By Freemasm
This one,Sir?

Take a look and let me know.
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-12-2021, 07:33 AM
Replies: 6
Views: 473
Posted By Freemasm
So far, I've found a universal (indexing) joint,...

So far, I've found a universal (indexing) joint, a black cover plate (left/right/off), and the majority of an extension, etc. I've got one more place to look. Will be out there again on Saturday. ...
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-11-2021, 02:21 PM
Replies: 6
Views: 473
Posted By Freemasm
Let me look tonight. I have some Andair misc...

Let me look tonight. I have some Andair misc stuff. Will PM you.
Forum: RV-6/6A 11-09-2021, 04:56 PM
Replies: 14
Views: 1,671
Posted By Freemasm
If as described by the OP, this aircraft is not...

If as described by the OP, this aircraft is not airworthy. The shear strength of 2117 versus versus steel is a small fraction. Doesn't matter how many "successful trouble free" hours the airframe has...
Forum: RV General Discussion/News 11-08-2021, 07:11 AM
Replies: 15
Views: 1,063
Posted By Freemasm
Just remember

Gas being very volatile will not readily reveal a slow leak. The blue dye in Avgas will leave a stain in time. Mogas will leave a stain but it's not as readily noticeable and takes longer. There's...
Forum: RV General Discussion/News 11-07-2021, 10:54 AM
Replies: 15
Views: 1,063
Posted By Freemasm
I tested mine with fuel (ethanol free Mogas) and...

I tested mine with fuel (ethanol free Mogas) and UV dye before and after the backplate was installed. Some have mentioned the added risk of using fuel but it wasn't anything that i believed wasn't...
Forum: RV Building Tips/Techniques 10-27-2021, 05:22 PM
Replies: 9
Views: 775
Posted By Freemasm
The aviation dept of Lowes, HD, Ace,...

The aviation dept of Lowes, HD, Ace, etc.

Assuming I'm understanding your intent, bullets or custom drifts are commonly just male fasteners with a long tapers machined and/or ground and/or...
Forum: RV Ongoing Maintenance Issues 10-27-2021, 07:47 AM
Replies: 20
Views: 1,606
Posted By Freemasm
@ BillL I respect your posts. You're one of the...

@ BillL

I respect your posts. You're one of the good guys who actually backs-up his statements with related theories and application versus anecdote; hence my respect.

Your quote: My assertion is...
Forum: RV Building Tips/Techniques 10-26-2021, 10:02 AM
Replies: 11
Views: 950
Posted By Freemasm
Building on previous comment

1097 rivets are great. Another very good option are 1241 rivets. They are 1/64Ē over sized versus 1/32. Blake at Flyboyaccessories sells them by the oz. No need to buy a little assortment if one...
Forum: RV Ongoing Maintenance Issues 10-26-2021, 09:48 AM
Replies: 20
Views: 1,606
Posted By Freemasm
A possible point of correction.

Good paper. Good read. Here in Humid AF Florida, lots of extra precautions are needed to protect your investment. The day/night temperature swings here help airframes and PPs to “breath” in moisture...
Forum: RV General Discussion/News 10-23-2021, 08:38 AM
Replies: 10
Views: 1,336
Posted By Freemasm
The relatively soft (commonly bronze alloy)...

The relatively soft (commonly bronze alloy) lining is exactly that. Bearings for higher loading applications do not have said soft linings as the loads exceed that material’s properties. Said...
Forum: RV General Discussion/News 10-23-2021, 06:41 AM
Replies: 10
Views: 1,336
Posted By Freemasm
Going to respectfully disagree. The self...

Going to respectfully disagree. The self lubricating claim typically means there is some type of “sacrificial” materials involved. This is true here. The manufacturers got rid of the Zerk fittings...
Forum: RV General Discussion/News 10-22-2021, 04:20 PM
Replies: 10
Views: 1,336
Posted By Freemasm
Youíll get e lot of opinions here. Start/Clean...

Youíll get e lot of opinions here. Start/Clean with mineral spirits. It should take care of anything petroleum based. Lube with Tri-Flow or equivalent. This Teflon resin app is common in certified...
Forum: RV General Discussion/News 10-21-2021, 03:36 PM
Replies: 46
Views: 4,141
Posted By Freemasm
+ 1 on water manometer

Physics doesnít lie. Make sure the device is vertical in two planes when recording measurements.
Forum: Reviews 10-20-2021, 06:51 PM
Replies: 32
Views: 3,709
Posted By Freemasm
@Steve, Throw in the fact that the structures...

@Steve,

Throw in the fact that the structures aren’t that rigid, especially relative to each other, stresses can get very high very fast. I started a thread inquiring about minimum tube length and...
Forum: Propellers 10-16-2021, 08:15 PM
Replies: 12
Views: 1,171
Posted By Freemasm
I would not

Only the OEM has the design parameters. In general, the spinner is needed to ensure proper airflow/distribution through the cylinders. Related issues may not reveal themselves immediately.
Forum: Propellers 10-13-2021, 07:05 AM
Replies: 12
Views: 1,930
Posted By Freemasm
In general, prop clocking matters; possible...

In general, prop clocking matters; possible harmonics, torsional vibrations, etc.

The only opinion here that really matters is the prop OEMs. PP OEMs tend to be silent on said applications and I...
Forum: Fuel Injection Systems 10-11-2021, 02:44 PM
Replies: 18
Views: 1,773
Posted By Freemasm
I let the previous post about cavitation-induced...

I let the previous post about cavitation-induced pitting/erosion simmer in my brain for a bit and came up with a thought. If normal operation for the BPR is to be mostly-open, then what about using...
Forum: RV Ongoing Maintenance Issues 10-11-2021, 11:37 AM
Replies: 4
Views: 508
Posted By Freemasm
If I'm reading your question correctly, I believe...

If I'm reading your question correctly, I believe you're approaching this the wrong way. If the airframe lists a max diameter, it is only a limit and has nothing to do with any performance...
Forum: Tools 10-07-2021, 09:32 AM
Replies: 10
Views: 1,088
Posted By Freemasm
Pin Crimpers

I haven't gotten into the meat of the electrical yet but little things are popping up already e.g. pitot heat lines, wing to fuse disconnect.

Which pin crimpers will be needed? I don't know...
Forum: RV-8/8A 10-06-2021, 10:21 AM
Replies: 12
Views: 1,530
Posted By Freemasm
Forgive me

Forgive the question. I'm building a Rocket (based on an RV-4), not an eight.

Do you have to set sweep, incidence, etc. and determine fore/aft attach points or are those preset/predrilled/etc on...
Forum: RV General Discussion/News 10-06-2021, 07:47 AM
Replies: 4
Views: 1,503
Posted By Freemasm
Quite the opposite, Sir. (@abuura)

I started to include a wiki link when I made the original post. What I saw in a quick search centered around steels and got to a level that really wasn’t too helpful from a practicality standpoint....
Forum: RV-4 10-05-2021, 07:13 PM
Replies: 4
Views: 694
Posted By Freemasm
@ Robert PM me with an email address and I can...

@ Robert

PM me with an email address and I can send you a .mov of the Rocket version in action.
Forum: Fuel Injection Systems 10-05-2021, 11:30 AM
Replies: 18
Views: 1,773
Posted By Freemasm
Corrected. Been awake since 0230 and really...

Corrected. Been awake since 0230 and really feeling it while trying to use my head during my lunch break. I don't get to engineer much anymore. Throw my idiocy on top of that and bad stuff happens....
Forum: RV General Discussion/News 10-05-2021, 11:06 AM
Replies: 11
Views: 1,387
Posted By Freemasm
Thanks. That's already been done, I'm told. Of...

Thanks. That's already been done, I'm told. Of course, it doesn't mean it was done right.

Thanks for the other comments as well. Will pass them along
Forum: Fuel Injection Systems 10-05-2021, 11:02 AM
Replies: 18
Views: 1,773
Posted By Freemasm
The under appreciated BPR

Was going to start a new thread here to avoid the drift but the topic swung to this so I think it’s appropriate.

BTW, &**&@! you smart contributors. I don’t often sleep for any extended periods of...
Forum: RV General Discussion/News 10-05-2021, 06:22 AM
Replies: 11
Views: 1,387
Posted By Freemasm
Thanks, to date. If anyone could expand on their...

Thanks, to date. If anyone could expand on their processes/techniques, I'm sure it would be appreciated.
Forum: RV General Discussion/News 10-04-2021, 07:35 PM
Replies: 11
Views: 1,387
Posted By Freemasm
Need product review, Static Tire Balancer

My friend asked me about this. Not sure he needs it but I told him I'd ask since there's no on-line reviews.

Background: His Texas Skyways (big engine STC) 182 is eating tires. He's looking for ways...
Forum: Fuel Injection Systems 10-04-2021, 10:51 AM
Replies: 18
Views: 1,773
Posted By Freemasm
I doubt you want a variable frequency drive for...

I doubt you want a variable frequency drive for your fuel pump. It’s one more thing to FEA. Not just the VFD, every system related device like sensors for input, etc. then you’d need to determine...
Forum: RV General Discussion/News 10-01-2021, 12:15 PM
Replies: 4
Views: 1,503
Posted By Freemasm
Intergranular corrosion, some real life pix

Been some confusion here and other places. Finally found another old part I was looking for; so, here's some "real life" pix of IG corrosion taken from a Mooney. Wheel well-wing attach bracket and...
Forum: Fuel Injection Systems 09-30-2021, 12:21 PM
Replies: 19
Views: 1,506
Posted By Freemasm
Sorry about that. Read it wrong. I know you knew...

Sorry about that. Read it wrong. I know you knew the applicability but assumed you brain-farted it. Turns out it was me
Forum: Electronic Ignition Systems 09-30-2021, 11:56 AM
Replies: 11
Views: 1,551
Posted By Freemasm
They are a "through bolt"; not installed in a...

They are a "through bolt"; not installed in a blind hole. No reason they would need safetying.
Forum: Fuel Injection Systems 09-30-2021, 08:22 AM
Replies: 19
Views: 1,506
Posted By Freemasm
Believe Airguy meant lower VP. He is correct as...

Believe Airguy meant lower VP.

He is correct as the pressure losses are a function of the square the flow if frictional losses of 35 versus 10 gpm are 12x higher. Throw in the extra elevation head...
Forum: RV General Discussion/News 09-30-2021, 08:02 AM
Replies: 16
Views: 2,500
Posted By Freemasm
Stress and Strain are linear and relative to each...

Stress and Strain are linear and relative to each other while the material (fasteners here) are in their elastic range.

As Ross pointed out, some fasteners in car engines utilize the "turn" method...
Forum: RV General Discussion/News 09-29-2021, 09:45 PM
Replies: 16
Views: 2,500
Posted By Freemasm
Hey Bill, Iím glad you brought up the RTV...

Hey Bill,

Iím glad you brought up the RTV jug/case joint issue. How many (fractions of?) mills of RTV you think still exist between those surfaces under that much clamping force? When it bakes...
Forum: RV General Discussion/News 09-29-2021, 01:13 PM
Replies: 16
Views: 2,500
Posted By Freemasm
(Fastener) Torque. Not a debate

If this comes off as a little preachy, sorry. Thereís been some threads here where some donít understand/want to debate:

Torque
Importance of
Proper methods
Application differences
whatever

Hereís...
Forum: Electronic Ignition Systems 09-28-2021, 07:48 PM
Replies: 11
Views: 1,551
Posted By Freemasm
Canít tell, but

If the socket head screws are engaged in a nut in the other side of the load/stack, (donít know/canít tell from the photo), no safetying is generally required. If they are installed in a blind hole,...
Forum: Rocket 09-24-2021, 10:20 AM
Replies: 5
Views: 797
Posted By Freemasm
Tank vents

RV style vents versus the single or double loop wing root Rocket vents.

Not picturing it. Can you fill the tanks configured with the Rocket wing root vents without having the tanks siphon to below...
Forum: RV Building Tips/Techniques 09-22-2021, 01:46 PM
Replies: 23
Views: 4,277
Posted By Freemasm
It's a bit more complicated

Torque values are not necessarily intuitive.

For a fastener in shear application (which is typically the preferred design approach), the torque value would yield a strain/stress at ~ 50% of the...
Forum: RV Building Tips/Techniques 09-22-2021, 08:55 AM
Replies: 9
Views: 1,065
Posted By Freemasm
Thanks Ralph. The run you mention was...

Thanks Ralph.

The run you mention was contemplated but I would had to make a (very) compounded curve to get past the fwd attach brackets. As mentioned, trying hard to keep those pump suction losses...
Forum: RV Building Tips/Techniques 09-21-2021, 12:07 PM
Replies: 9
Views: 1,065
Posted By Freemasm
It's a Rocket. No specific fuel system layout to...

It's a Rocket. No specific fuel system layout to draw from. Plus, I'm attempting to have the fuel system configured for the lower VP of Mogas in case I'm ever forced in that direction. Hence, trying...
Forum: Traditional Aircraft Engines 09-21-2021, 10:50 AM
Replies: 19
Views: 1,743
Posted By Freemasm
Need way more info

Unleaded fuel covers a wide range of stuff. Lots of variables/parameters to consider:

Is the UL fuel MoGas or one of the aircraft alternative fuels?
What is the listed octane rating of the...
Forum: Traditional Aircraft Engines 09-21-2021, 10:12 AM
Replies: 56
Views: 16,677
Posted By Freemasm
Have been very curious myself. Would love to hear...

Have been very curious myself. Would love to hear the approach. Surprised no one has eaten a canopy to date.

This following link was cut out of a post I put in the general section which I...
Forum: RV Building Tips/Techniques 09-21-2021, 08:15 AM
Replies: 9
Views: 1,065
Posted By Freemasm
Rigid Fuel Lines- What is too short?

Sincere question looking for legitimate answer. What constitutes "too short" for rigid fuel lines? I'm aware of the variables (relative rigidity of structure between the two connecting points....
Forum: RV General Discussion/News 09-20-2021, 06:48 AM
Replies: 25
Views: 2,677
Posted By Freemasm
My apologies for the drift. Do the 680s fare well...

My apologies for the drift. Do the 680s fare well forward of the firewall? Blast tubes required? What do you know/what are your experiences?

Thanks
Forum: RV General Discussion/News 09-17-2021, 09:39 AM
Replies: 25
Views: 2,677
Posted By Freemasm
I would love to utilize a Lithium X battery in my...

I would love to utilize a Lithium X battery in my aircraft. Picking up a Li Fe battery at the airshows almost seems like you're being pranked; the weight is so light. That said, the current forms do...
Forum: RV Building Tips/Techniques 09-06-2021, 08:01 AM
Replies: 15
Views: 1,451
Posted By Freemasm
I’m gonna question that on anecdotal evidence and...

I’m gonna question that on anecdotal evidence and explain my reasoning. I don’t believe it has anything to do with molecular weight or complexity. My reasoning = the airframe preservative oils have...
Forum: RV Building Tips/Techniques 09-05-2021, 07:35 AM
Replies: 15
Views: 1,451
Posted By Freemasm
Do a search for manometer or similar. Here is one...

Do a search for manometer or similar. Here is one such thread

https://vansairforce.net/community/showthread.php?t=58361&highlight=Leak

I too wanted to leak check as throughly as possible before...
Forum: Traditional Aircraft Engines 09-03-2021, 12:09 PM
Replies: 23
Views: 3,671
Posted By Freemasm
There are Mazda diesels but compression...

There are Mazda diesels but compression ignition/direct injection is nothing new. Their new family of engines are direct injection gasoline engines and for the most part are leading the industry in...
Forum: Tools 09-03-2021, 08:22 AM
Replies: 0
Views: 360
Posted By Freemasm
Angle Drill Upgrade (trigger safety)

I have an ancient ARO angle drill. Picture with the big chuck I was using for a hole saw. The Trigger Safety on these tools is probably woefully under appreciated; especially on this one that...
Forum: RV Ongoing Maintenance Issues 08-26-2021, 10:53 PM
Replies: 15
Views: 2,015
Posted By Freemasm
Donít think that was me but Iím pretty brain dead...

Donít think that was me but Iím pretty brain dead these days. If the surface corrosion cleaned up by mechanical means, youíre good to go. There are a million opinions on surface prep, conversion...
Forum: Electrical Systems 08-25-2021, 07:37 AM
Replies: 25
Views: 4,951
Posted By Freemasm
What is the range of engine parasitic (for lack...

What is the range of engine parasitic (for lack of better terms) load in HP? I can back calc the theoretical of course but do you have measured points and standby and full load?

Thanks
Forum: Alternative Engines 08-24-2021, 11:08 AM
Replies: 16
Views: 3,103
Posted By Freemasm
Per the car guys, which I'm not: The subject...

Per the car guys, which I'm not:

The subject engine is detuned and efficiency is hampered by emissions equipment. Many of these engines on the road running pushing well north of 500ftlbs between...
Forum: Alternative Engines 08-24-2021, 07:24 AM
Replies: 16
Views: 3,103
Posted By Freemasm
(personal) Fantasy Land auto engine candidate

No reason to reply and tell me all of the things not considered here. I'm aware. However, if I were to fantasize about myself adapting an auto engine to an aircraft I probably start here (thanks to...
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