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Search: Posts Made By: Freemasm
Forum: Traditional Aircraft Engines 08-09-2022, 12:42 PM
Replies: 5
Views: 251
Posted By Freemasm
Impossible to accurately determine SHP from your...

Impossible to accurately determine SHP from your data but the first guess would be you are indeed over-propped. Assuming your flight numbers are WOT, the RPM appears low there and at static. The...
Forum: RV Building Tips/Techniques 08-09-2022, 06:18 AM
Replies: 7
Views: 320
Posted By Freemasm
Secondary effect(s)

The restriction dampens pressure ripple; common with PD pumps like oil pumps. Besides steadying the readout, it will prolong the life of the sensing element.

I had always made the assumption from...
Forum: RV-8/8A 08-08-2022, 11:38 AM
Replies: 9
Views: 798
Posted By Freemasm
Parallel valve: Stroked to 370-ish CIs better...

Parallel valve:

Stroked to 370-ish CIs
better breathing sump
EI
etc.

The HP numbers are then very close to the 390 at less weight and cost.

Yes, you could do much of the same to the 390 but a more...
Forum: RV-8/8A 08-07-2022, 07:29 PM
Replies: 3
Views: 304
Posted By Freemasm
Donít know that WW has actually shipped any. I...

Donít know that WW has actually shipped any. I have the drawing but they claim the prop shipment is held up because the spinner vendor hasnít supplied any yet. Otherís may have heard a different...
Forum: RV Building Tips/Techniques 08-07-2022, 06:37 AM
Replies: 3
Views: 236
Posted By Freemasm
Hard to say without seeing what youíre seeing....

Hard to say without seeing what youíre seeing.

Convention:

Dashed line = hidden. Feature is on opposite side
Solid line = visible/near side.

Yes, itís a sub-fundamental answer but youíre...
Forum: RV Building Tips/Techniques 08-06-2022, 07:01 AM
Replies: 15
Views: 862
Posted By Freemasm
Both the human body and nature are amazingly...

Both the human body and nature are amazingly resilient regarding the abuse we throw at them. Not intending to sound preachy but Itís best not to challenge either unnecessarily, IMO. Thereís plenty of...
Forum: Rocket 08-05-2022, 07:04 AM
Replies: 8
Views: 1,635
Posted By Freemasm
Update = Still waiting

No prop yet. They are blaming the spinner vendor and production issues though it doesn't matter to me. 8 week promise is now 14 weeks and counting. A "pseudo" update is here in the propeller...
Forum: RV Building Tips/Techniques 08-05-2022, 06:50 AM
Replies: 15
Views: 862
Posted By Freemasm
Be mindful

No one will argue alodine's effectiveness. Any informed person will not argue its health and environmental hazards; it really is that bad. Dip tanks, capture sluices, etc. are great for capturing...
Forum: RV Building Tips/Techniques 07-30-2022, 04:12 PM
Replies: 5
Views: 471
Posted By Freemasm
Don’t mean to be insulting but is the ram Stroke...

Don’t mean to be insulting but is the ram
Stroke set correctly?

If you don’t know, the “cam” action that actuates the ram is not a linear function/geometry. The real force doesn’t kick in until the...
Forum: Traditional Aircraft Engines 07-29-2022, 05:56 AM
Replies: 17
Views: 1,344
Posted By Freemasm
^^^ Yes, it is helpful to seat the rings by...

^^^
Yes, it is helpful to seat the rings by slightly rocking them but the leak was heard from the exhaust pipe versus the breather; so ,doubting it will be helpful this time

@OP , yes 25 squared...
Forum: RV General Discussion/News 07-28-2022, 06:51 AM
Replies: 94
Views: 50,265
Posted By Freemasm
I'm a big fan of the related efforts to date. For...

I'm a big fan of the related efforts to date. For my curiosity, what is the weight delta between this product and the standard wing?
Forum: Traditional Aircraft Engines 07-27-2022, 07:04 AM
Replies: 17
Views: 1,344
Posted By Freemasm
Pure conjecture

Pure conjecture on my part. Differential expansion rates, related geometries, etc. always come into play for such a design. The primary sealing force for valves are the related springs. If valve...
Forum: RV General Discussion/News 07-26-2022, 05:58 AM
Replies: 94
Views: 50,265
Posted By Freemasm
Engineering/designing is a continuous lesson in...

Engineering/designing is a continuous lesson in compromise. I've designed aerospace systems and power generation systems. In the back of your mind, there's always worry about the alligator you didn't...
Forum: Traditional Aircraft Engines 07-24-2022, 10:01 AM
Replies: 5
Views: 474
Posted By Freemasm
Thumb typing. Pardon the brevity Standard...

Thumb typing. Pardon the brevity

Standard responses are abundant regarding sealing baffling.

Re problem 2 What fuel are you burning?

Iíd verify thereís no ďnewĒ pressure losses up to the MFP....
Forum: RV Ongoing Maintenance Issues 07-22-2022, 05:56 AM
Replies: 7
Views: 471
Posted By Freemasm
This ^ ^ ^ The primary premise of the worm...

This ^ ^ ^


The primary premise of the worm drive is to prevent counter-forces from driving the mechanism and/or fail in place. I wouldn't trust working around any overhead door that relied...
Forum: RV Ongoing Maintenance Issues 07-21-2022, 11:07 AM
Replies: 10
Views: 739
Posted By Freemasm
NOT Skygeek. In short summary, they are not...

NOT Skygeek. In short summary, they are not (always) ethical. They probably do a lot of purchase/resell.

The basis of my point; they will tell you something is "in stock" then quote many weeks for...
Forum: RV-8/8A 07-14-2022, 09:53 AM
Replies: 8
Views: 748
Posted By Freemasm
Before you drill anything, get a piece of...

Before you drill anything, get a piece of hardwood and slit/shape accordingly. It should be shaped:

slit deep enough to allow the cantilevered skin to not "bottom out" and not be formed.

slit tight...
Forum: Electrical Systems 07-14-2022, 07:19 AM
Replies: 59
Views: 11,323
Posted By Freemasm
I assume this was related to my Church of...

I assume this was related to my Church of Froehlich schematic/post. Keep in mind, the builder gets to do what ever they wish. There's a lot of ways to do it. I'm willing to learn but have no desire...
Forum: Rocket 07-12-2022, 04:39 PM
Replies: 14
Views: 1,393
Posted By Freemasm
I'm aware of most of these issues but these...

I'm aware of most of these issues but these performance numbers, no PRSU, diesel/jet fuel still make me fantasize.

https://vansairforce.net/community/showthread.php?t=198566
Forum: RV Ongoing Maintenance Issues 07-12-2022, 09:44 AM
Replies: 5
Views: 504
Posted By Freemasm
Post a schematic of your system. Sounds far more...

Post a schematic of your system. Sounds far more like a leaking control valve than anything else. I'm not picturing how a check valve would be incorporated/necessary. That said, most CV that fit...
Forum: Rocket 07-12-2022, 06:28 AM
Replies: 14
Views: 1,393
Posted By Freemasm
Thank you for catching me on that. I tend to skim...

Thank you for catching me on that. I tend to skim especially when viewing on the phone. I believe my info to be correct though not relevant to your question; story of my life. That said, sounds like...
Forum: Rocket 07-11-2022, 09:59 AM
Replies: 14
Views: 1,393
Posted By Freemasm
ooh boy. You'll definitely be into the design...

ooh boy. You'll definitely be into the design margins. There's lot to consider but I'll state what I think I know, i.e.wings. The rockets re-station the ribs 1" closer throughout the length....
Forum: RV General Discussion/News 07-10-2022, 07:03 AM
Replies: 31
Views: 2,704
Posted By Freemasm
But how? Making assumptions but isnít the oil...

But how? Making assumptions but isnít the oil door is way forward? How do you reach the upper hinge pins? Iím installing a four banger so the mount is looong. Plenty of room between FW and engine...
Forum: RV General Discussion/News 07-08-2022, 06:24 AM
Replies: 31
Views: 2,704
Posted By Freemasm
Cowl Fastener/method choice

Bit of a nube question but I'm serious. What cowl fastening method did you use choose ? Why you settled on your choice (besides it was in the instructions)? Would you have done it differently? Would...
Forum: Traditional Aircraft Engines 07-07-2022, 06:15 AM
Replies: 50
Views: 4,126
Posted By Freemasm
Can't speak for our northern brothers; however,...

Can't speak for our northern brothers; however, it's worth checking for a similar policy/arrangement. Check your local auto parts store. In most of the states, if a business sells oil/oil change...
Forum: RV Building Tips/Techniques 07-06-2022, 08:54 AM
Replies: 13
Views: 1,064
Posted By Freemasm
Sounds like your mind is made up. Your build so...

Sounds like your mind is made up. Your build so do as you wish. 24" isn't going to do much for an elevator push/pull link.

For anyone else that cares, the aforementioned Dinitrol product (and...
Forum: RV Building Tips/Techniques 07-06-2022, 05:55 AM
Replies: 13
Views: 1,064
Posted By Freemasm
You're most likely not going to get good coverage...

You're most likely not going to get good coverage from any paint product if the tubes have any length. I put Dinitrol AV8 in tubes as well. It is a great product and does dry so coating the exterior...
Forum: RV General Discussion/News 07-05-2022, 05:15 PM
Replies: 26
Views: 1,700
Posted By Freemasm
Gonna add a little to the comments. As mentioned,...

Gonna add a little to the comments. As mentioned, add radian shields where appropriate. Closer to the source would probably be better here; accessibility, no hinderance to local airflow, etc. ...
Forum: Tools 06-30-2022, 07:29 PM
Replies: 11
Views: 907
Posted By Freemasm
I've used my phone app plenty of times (the two...

I've used my phone app plenty of times (the two plane feature is wicked cool). It has it's purpose. It also has its limitations.

Relative/absolute feature is more handy than you'd expect. You don't...
Forum: Electrical Systems 06-29-2022, 06:05 AM
Replies: 1
Views: 690
Posted By Freemasm
Check PM please

Check PM please
Forum: Traditional Aircraft Engines 06-29-2022, 05:47 AM
Replies: 4
Views: 444
Posted By Freemasm
Instrument (directional) hysteresis?

Instrument (directional) hysteresis?
Forum: Electrical Systems 06-28-2022, 02:49 PM
Replies: 6
Views: 516
Posted By Freemasm
Got contactors in the individual feeds? Try...

Got contactors in the individual feeds? Try loading each side separately, and independently and watch the voltages. If it drops a little as load goes up, the contactors (drop across them) is...
Forum: Traditional Aircraft Engines 06-28-2022, 02:06 PM
Replies: 11
Views: 1,041
Posted By Freemasm
There are always outliers to any data sample....

There are always outliers to any data sample. Sometimes luck is involved. I'm convinced through anecdote that the older components had better properties and/or quality in many cases despite their...
Forum: Traditional Aircraft Engines 06-28-2022, 11:32 AM
Replies: 11
Views: 1,041
Posted By Freemasm
Always good to hear from you, Larry. I always...

Always good to hear from you, Larry. I always read your posts. Always very insightful and knowledgeable but I'm gonna have to disagree with you on this one, Maybe your definition is on the micro...
Forum: Traditional Aircraft Engines 06-28-2022, 10:02 AM
Replies: 11
Views: 1,041
Posted By Freemasm
It is helping and not just with preventing...

It is helping and not just with preventing corrosion from the more obvious sense. Engine oils (being generic here) like to absorb water and become acidic. Secondly, water and oil do mix contrary to...
Forum: Traditional Aircraft Engines 06-28-2022, 07:31 AM
Replies: 11
Views: 1,041
Posted By Freemasm
Figured on this one. The principle equilibrium is...

Figured on this one. The principle equilibrium is a fact (some say force) in nature and especially important in fluid chemistry. It is not a "hope". Also, no one suggested oil vapor as a motive force...
Forum: Traditional Aircraft Engines 06-28-2022, 06:36 AM
Replies: 11
Views: 1,041
Posted By Freemasm
Engine Preservation. Cheap, hopefully effective apporach

My Titan Engine is supposed to be preserved. It's been out of the desiccated bag a a few months now as I flounder with baffles, firewall component layout, cowling, etc. Can't over-fill the engine...
Forum: RV General Discussion/News 06-27-2022, 12:57 PM
Replies: 13
Views: 2,366
Posted By Freemasm
Not an update, per se'. Go about 20-ish minutes...

Not an update, per se'. Go about 20-ish minutes into the podcast for verification of suspicion (of suspicions) and status...
Forum: Traditional Aircraft Engines 06-27-2022, 07:34 AM
Replies: 13
Views: 1,556
Posted By Freemasm
It is seemingly a strangely acting measurement....

It is seemingly a strangely acting measurement. Do you trust the instrumentation?

I'd strongly consider applying Occam's razor here. Consider swapping two TCs and see if the output characteristic...
Forum: RV General Discussion/News 06-26-2022, 05:49 AM
Replies: 54
Views: 9,424
Posted By Freemasm
With rare exception for specific models, the pump...

With rare exception for specific models, the pump OEMs do not warrant and even prohibit PWM control of their products. Some control modules have better dampening than others but all increase...
Forum: RV General Discussion/News 06-25-2022, 02:54 PM
Replies: 54
Views: 9,424
Posted By Freemasm
Not one bit. I thought you were having pressure...

Not one bit. I thought you were having pressure excursions and decay from your previous posts. Something to keep an eye on.
Forum: RV General Discussion/News 06-25-2022, 08:18 AM
Replies: 54
Views: 9,424
Posted By Freemasm
Thumb typing so pardon any brevity. Pressure...

Thumb typing so pardon any brevity.

Pressure Regs are basically two types; the assumed application senses/controls downstream/forward pressure. One that senses/controls upstream pressure (like...
Forum: RV General Discussion/News 06-25-2022, 06:52 AM
Replies: 54
Views: 9,424
Posted By Freemasm
Yes, but

All of this is obviously true; but, from the pic there's a downcomer line. Unless there's an air leak on the suction side, that config should be fine.

Obviously I don't have component info or data....
Forum: RV General Discussion/News 06-24-2022, 12:30 PM
Replies: 54
Views: 9,424
Posted By Freemasm
Interesting. That type of pump has very linear...

Interesting. That type of pump has very linear characteristics. The only real scenario that makes sense for what you describe is a mechanical failure where the pump's internal friction has...
Forum: Electrical Systems 06-24-2022, 12:16 PM
Replies: 21
Views: 2,586
Posted By Freemasm
A question for the uninformed, please.

I'm not deep into wiring yet so I haven't geeked up to the required levels yet.

The only reference I've found regarding wire support/secure intervals is not to exceed 24 inches. Any of you better...
Forum: RV General Discussion/News 06-23-2022, 09:24 AM
Replies: 27
Views: 2,930
Posted By Freemasm
Details please

Details please
Forum: Propellers 06-22-2022, 06:12 PM
Replies: 6
Views: 1,192
Posted By Freemasm
Coming from what? Aluminum or three blade...

Coming from what? Aluminum or three blade MT12?

Give us some power plant info and performance delta info as well. If it performs anywhere close to its appearance, I assume youíll be happy.
Forum: RV Ongoing Maintenance Issues 06-22-2022, 09:31 AM
Replies: 29
Views: 3,240
Posted By Freemasm
Not looking to start a fight but going to opine...

Not looking to start a fight but going to opine anyway. The listed criteria appears to pertain to forming a bend, proper. This "kink" is not. If you extrapolated the curve, I'm sure you'd find it...
Forum: Traditional Aircraft Engines 06-20-2022, 03:43 PM
Replies: 19
Views: 4,555
Posted By Freemasm
I don't have a secret or technique. I made it...

I don't have a secret or technique. I made it slightly oversized at the top/formed area and iterated it down to a good fit. The important part IMO is the curved portion so that there's a good...
Forum: Alternative Engines 06-20-2022, 12:13 PM
Replies: 42
Views: 4,950
Posted By Freemasm
Was going only on what was previously posted. Now...

Was going only on what was previously posted. Now I know. At least their market target makes sense now. If their FWF kit/PP/prop is competitive with OH'd component prices, they've got a decent...
Forum: Alternative Engines 06-20-2022, 07:34 AM
Replies: 42
Views: 4,950
Posted By Freemasm
Attached below. First let me say, I'm an...

Attached below.



First let me say, I'm an engineer and not a market analyst. That said, I don't understand UL's approach to the market. Getting in bed with an OEM goes a very long way in creating...
Forum: Alternative Engines 06-19-2022, 07:22 AM
Replies: 42
Views: 4,950
Posted By Freemasm
Air BnB changed the way a lot of people book...

Air BnB changed the way a lot of people book vacation stays, Same for Uber and the taxi biz. As for GA, this is a bit of a tough one to come up with the best example here. innovative companies come...
Forum: Alternative Engines 06-17-2022, 04:46 PM
Replies: 42
Views: 4,950
Posted By Freemasm
That comment was for Ross who makes products that...

That comment was for Ross who makes products that do exactly that.

@ Carl. DI on gasoline is a tough environment. The types of pumps needed to get to the pressures required are positive displacement...
Forum: Alternative Engines 06-17-2022, 02:07 PM
Replies: 42
Views: 4,950
Posted By Freemasm
This continues to boost my main point....

This continues to boost my main point. Economically, don't expect any market disruption. Now, if only someone could make a product that could take advantage of the legacy design's strengths while...
Forum: Alternative Engines 06-17-2022, 11:27 AM
Replies: 42
Views: 4,950
Posted By Freemasm
I purposely wasn't considering liability issues....

I purposely wasn't considering liability issues. They are well known. I'm talking about getting something to market below the current levels. Don't the previous replies/arguments kind of drive my...
Forum: Alternative Engines 06-17-2022, 07:48 AM
Replies: 42
Views: 4,950
Posted By Freemasm
Just my opinion

Gonna state the obvious, in my perception of reality at least.

Any new aero (applied) engine that is going to be a market disrupter from an economic standpoint (versus another "me too" option) are...
Forum: RV-4 06-16-2022, 06:59 AM
Replies: 12
Views: 1,164
Posted By Freemasm
Yes Sir. Invented and utilized by people that...

Yes Sir. Invented and utilized by people that sleep well at night. My background is aerospace before moving over to the power industry. I learned so much from the A&Ps I worked with on the space...
Forum: RV-4 06-16-2022, 05:58 AM
Replies: 12
Views: 1,164
Posted By Freemasm
Not wishing to start a debate and sorry for...

Not wishing to start a debate and sorry for adding to the drift. As long as the castel nut is pinned, it is at least as good as the self locking nut. That's what their design intent was for;...
Forum: Traditional Aircraft Engines 06-15-2022, 11:41 AM
Replies: 6
Views: 813
Posted By Freemasm
If the cylinder seat has been eroded, the (lack...

If the cylinder seat has been eroded, the (lack of) surface finish will far exceed anything acceptable to make a seal. More sealing material, talking the extra thick spiral wound style, will not...
Forum: Rocket 06-15-2022, 08:55 AM
Replies: 19
Views: 2,743
Posted By Freemasm
It's both simpler and more complex than that. A...

It's both simpler and more complex than that. A whole lot could be written here. In very brief summary from what I'm trying to remember:

RV-4 - A well known Vans product. Designed around a...
Forum: Traditional Aircraft Engines 06-14-2022, 08:07 PM
Replies: 6
Views: 813
Posted By Freemasm
Going to skip forward a bit. Drop that riser and...

Going to skip forward a bit. Drop that riser and look at the gasket seating surface. If it leaked for any length of time, the cylinder surface may have eroded. If so, youíll probably need to pull...
Forum: Electrical Systems 06-14-2022, 09:26 AM
Replies: 59
Views: 11,323
Posted By Freemasm
IIRC you utilize mechanical fuel injection. You'd...

IIRC you utilize mechanical fuel injection. You'd still need something similar for EFI regardless of Ignition type.
Forum: Rocket 06-14-2022, 06:51 AM
Replies: 8
Views: 1,635
Posted By Freemasm
Got a few minutes before another meeting. I hope...

Got a few minutes before another meeting. I hope to hit on all of your points in the related PM.

I was waiting on a final declaration from WW before making my prop choice; reference the original...
Forum: Electrical Systems 06-13-2022, 07:45 PM
Replies: 59
Views: 11,323
Posted By Freemasm
Standing on the shoulders of others

Boundary Conditions:
Electrically dependent aircraft
EFII (came with Titan Engine)
Monkworkz Back-up gen

This is my proposed single-line functional diagram; no connection points, wire sizes, etc....
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