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Search: Posts Made By: Freemasm
Forum: RV General Discussion/News Today, 05:49 AM
Replies: 52
Views: 8,455
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 Yesterday, 02:54 PM
Replies: 52
Views: 8,455
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 Yesterday, 08:18 AM
Replies: 52
Views: 8,455
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 Yesterday, 06:52 AM
Replies: 52
Views: 8,455
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: 52
Views: 8,455
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: 18
Views: 1,357
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: 2,263
Posted By Freemasm
Details please

Details please
Forum: Propellers 06-22-2022, 06:12 PM
Replies: 6
Views: 894
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 you’ll be happy.
Forum: RV Ongoing Maintenance Issues 06-22-2022, 09:31 AM
Replies: 19
Views: 2,013
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: 4,246
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: 3,634
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: 3,634
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: 3,634
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: 3,634
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: 3,634
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: 3,634
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: 3,634
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: 779
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: 779
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: 547
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: 2,003
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: 547
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, you’ll probably need to pull...
Forum: Electrical Systems 06-14-2022, 09:26 AM
Replies: 51
Views: 8,987
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: 7
Views: 1,182
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: 51
Views: 8,987
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....
Forum: RV General Discussion/News 06-10-2022, 06:00 AM
Replies: 25
Views: 5,251
Posted By Freemasm
coalesce water only? collect? Not the...

coalesce water only? collect?



Not the outgassing you have to concern yourself with. It will quickly find it's equilibrium in a confined volume. The different expansion coefficients are a different...
Forum: Traditional Aircraft Engines 06-09-2022, 05:57 AM
Replies: 13
Views: 2,091
Posted By Freemasm
Thanks. I would have lost that bet. For my...

Thanks. I would have lost that bet. For my benefit, how do you verify no cross over; the dry side is staying dry and charged?
Forum: RV General Discussion/News 06-09-2022, 05:53 AM
Replies: 25
Views: 5,251
Posted By Freemasm
Couldn't tell you. I'm not a car guy; however,...

Couldn't tell you. I'm not a car guy; however, the components I've gotten from Summit Racing have all been of very good quality.

People state that testing with fuel is too dangerous. That's a...
Forum: RV General Discussion/News 06-08-2022, 08:14 PM
Replies: 25
Views: 5,251
Posted By Freemasm
Gas can leak through where water won’t for the...

Gas can leak through where water won’t for the reason listed above. If using water, add a surfactant to break down the surface tension. Adding dish soap is better than nothing.
Forum: Traditional Aircraft Engines 06-08-2022, 12:21 PM
Replies: 13
Views: 2,091
Posted By Freemasm
This aligns with industry standards; pre-charge...

This aligns with industry standards; pre-charge 80-90% system press when primary purpose is make-up power (pressure). ~ 50% when the primary purpose is pressure pulsation dampening, others. Of...
Forum: Traditional Aircraft Engines 06-08-2022, 11:20 AM
Replies: 33
Views: 1,956
Posted By Freemasm
You can't divorce the design parameters and a...

You can't divorce the design parameters and a change in one will influence another. Air flat sucks as a cooling media compared to other fluids, i.e specific heat. "Built so tightly" was probably...
Forum: RV General Discussion/News 06-08-2022, 07:56 AM
Replies: 25
Views: 5,251
Posted By Freemasm
Has nothing to do with it

Surface tension. Surface tension. Surface tension. Anything else is a distant secondary influencer.
Forum: RV General Discussion/News 06-08-2022, 06:50 AM
Replies: 5
Views: 865
Posted By Freemasm
Ghetto gear

What Larry said; or, just leave your airworthy aircraft on the wrong side of town overnight.
Forum: RV Building Tips/Techniques 06-07-2022, 08:50 AM
Replies: 8
Views: 714
Posted By Freemasm
Can't get in the minds of designers/builders but...

Can't get in the minds of designers/builders but from my ancient memory banks:

The venting on lead type batteries enclosures is probably/was originally for H2 off-gassing when charging. It is an FAA...
Forum: Electrical Systems 06-06-2022, 12:18 PM
Replies: 24
Views: 1,979
Posted By Freemasm
Sorry for the resurrection

After some on/off looking, I may have found an actual rebuilt ND 14158 at Rock Auto. GREAT place for older, budget minded auto stuff, BTW. can get teh same price as a dealer distributer unless...
Forum: Rocket 06-06-2022, 11:24 AM
Replies: 3
Views: 420
Posted By Freemasm
Been watching this since yesterday and no one has...

Been watching this since yesterday and no one has chimed in. Tough question to answer from a description. Sounds like you're trying to make HRII wings from a spar already drilled for an RV4. You're...
Forum: Traditional Aircraft Engines 06-06-2022, 09:45 AM
Replies: 7
Views: 522
Posted By Freemasm
Cable aside, you changed the configuration. No...

Cable aside, you changed the configuration. No one here can alter the laws that govern kinematics. Additionally, the cable should freely rotate inside of the shield. If the end weren't secured when...
Forum: Traditional Aircraft Engines 06-06-2022, 05:59 AM
Replies: 7
Views: 522
Posted By Freemasm
You have plenty of "throw". The hrottle cable end...

You have plenty of "throw". The hrottle cable end dimensions are now not optimal.

- You can make new connections points at the forward end if room is available.
- You can order a new cable with...
Forum: RV Building Tips/Techniques 06-05-2022, 07:02 AM
Replies: 8
Views: 471
Posted By Freemasm
Lots of ways. Some caution advised

A regulator force-balances the downstream (or whatever conditions they're trying to control) pressure, and sometimes ambient pressure against (adjustable) spring forces to maintain the desired...
Forum: Rocket 06-04-2022, 07:34 AM
Replies: 7
Views: 1,182
Posted By Freemasm
@Andoman. Would gladly resurrect this thread if I...

@Andoman. Would gladly resurrect this thread if I live long enough to complete this project. A much better source is the aforementioned thread (see link) in the first post here. Lots of RV experience...
Forum: Electronic Ignition Systems 06-03-2022, 02:19 PM
Replies: 13
Views: 979
Posted By Freemasm
This is a truly bad idea for less than obvious...

This is a truly bad idea for less than obvious but well discussed reasons; the relative safety associated with the different chemistries.

Assuming the DeWalt is LIon = potential for runaway thermal...
Forum: Rocket 06-03-2022, 11:24 AM
Replies: 7
Views: 1,182
Posted By Freemasm
Wasn't supposed to be a debate. MTs have been...

Wasn't supposed to be a debate. MTs have been applied here for a long time. Was letting Rocket World know of a new option. I could have gone with an MT and only driven 30 miles to pick it up. They...
Forum: RV Ongoing Maintenance Issues 06-03-2022, 08:52 AM
Replies: 10
Views: 887
Posted By Freemasm
Parasitic losses through pipes/tubes are...

Parasitic losses through pipes/tubes are proportional to the fifth power of the diameter. A 1/2" ID tube or pipe would have 32X the losses of a 1" so some systems are very sensitive to ID changes...
Forum: RV Building Tips/Techniques 06-03-2022, 07:52 AM
Replies: 5
Views: 702
Posted By Freemasm
It's all about intended application. Why would...

It's all about intended application.

Why would a company list a shear value for an elastomer not intended to be used as an adhesive?

Why would you not expect "micro movement" from a sealant that...
Forum: Propellers 06-02-2022, 11:04 AM
Replies: 6
Views: 894
Posted By Freemasm
On order

They have been developing a 15" spinner for the three blade 330. I ordered my combo ~ five weeks ago. Got the spinner drawing yesterday. Looking forward to having it take up some more hangar space...
Forum: Rocket 06-02-2022, 10:57 AM
Replies: 7
Views: 1,182
Posted By Freemasm
New Prop Option from Whirlwind

Whirlwind is on the verge of releasing a 15" spinner for the 330 series. Gives Rocket world another very good option, IMO. I settled here for a few reasons:

- The reviews on it here have been flat...
Forum: RV Building Tips/Techniques 06-02-2022, 06:12 AM
Replies: 6
Views: 680
Posted By Freemasm
yes, but

Always admiration for ingenuity. That said, bubble levels are notoriously inaccurate and often non-repeatable if not using the same side and direction each time. I've used my phone app when I could...
Forum: Electrical Systems 06-01-2022, 11:26 AM
Replies: 15
Views: 811
Posted By Freemasm
A different mind set

If the battery isn't going to hold a charge, I want to know it at my home field. I stopped using a float charger after having to hand prop a Mooney after a long lunch. First and hopefully last time...
Forum: RV Building Tips/Techniques 06-01-2022, 11:21 AM
Replies: 8
Views: 574
Posted By Freemasm
At that point, why not an AN161?

At that point, why not an AN161?
Forum: VAF Classifieds (posts in here deleted after 30 days) 06-01-2022, 06:02 AM
Replies: 10
Views: 1,072
Posted By Freemasm
Thanks to all

Yes. Have PM'd Mr. Johnson and hopefully I can get a ride that way soon. Will cost me more in lunch/AvGas/beer/whatever than shipping but don't want to put anyone out if I can help it. I also...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-31-2022, 10:54 AM
Replies: 10
Views: 1,072
Posted By Freemasm
Thanks but I really want the rigidity of the real...

Thanks but I really want the rigidity of the real thing. I have to mock-up the heavy gage stuff as well for FW penetrations, starter/alt/back-up gen routings, etc. I work in the power generation OEM...
Forum: RV General Discussion/News 05-31-2022, 09:17 AM
Replies: 9
Views: 1,300
Posted By Freemasm
I not intentionally implying but we all know how...

I not intentionally implying but we all know how the world works. You can maintain your market share by being better or cheaper. Think Snap-on versus Harbor Freight. Both have a place in that market ...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-31-2022, 08:34 AM
Replies: 10
Views: 1,072
Posted By Freemasm
WTA PC680, dead

Anyone with a dead PC680 they want to part with? I'd like one for fit-up, wiring, etc. so the deader, the better. Let me know. Here or PM is fine. Thanks.
Forum: RV General Discussion/News 05-31-2022, 08:20 AM
Replies: 9
Views: 1,300
Posted By Freemasm
There's so much future profit involved. Yes, it's...

There's so much future profit involved. Yes, it's comparatively a drop in the bucket for Big Oil but...

If a company can politically position itself to supply a closed market, they gain and everyone...
Forum: Electrical Systems 05-24-2022, 07:39 PM
Replies: 16
Views: 1,165
Posted By Freemasm
Not sure I follow but trying. As more aircraft...

Not sure I follow but trying. As more aircraft become electrically dependent, wasted "parasitic" loads become a bigger deal IMO. Sure, I could throw the standard silver cans in the architecture. A...
Forum: Electrical Systems 05-24-2022, 10:10 AM
Replies: 16
Views: 1,165
Posted By Freemasm
My reference and question is to the GV200 series...

My reference and question is to the GV200 series with the M coil option (PWM control and low holding current). The dual coil options in this series would have better characteristics than the MX...
Forum: Electrical Systems 05-24-2022, 08:00 AM
Replies: 16
Views: 1,165
Posted By Freemasm
Strange. It was there and suddenly wasn't. Can...

Strange. It was there and suddenly wasn't. Can still order them from GV proper. Here is a spec sheet. I did get the weight wrong in my previous quick compare table. It makes more sense. The form...
Forum: RV-8/8A 05-23-2022, 07:41 PM
Replies: 5
Views: 536
Posted By Freemasm
No firsthand knowledge but I followed thread and...

No firsthand knowledge but I followed thread and found it helpful.

https://vansairforce.net/community/showthread.php?t=192684
Forum: Electrical Systems 05-23-2022, 12:15 PM
Replies: 16
Views: 1,165
Posted By Freemasm
The Blue Sea L9012 is on the list. Going to...

The Blue Sea L9012 is on the list. Going to assume it's also a PWM controlled coil sole based on comparative specs. I'm considering that one and the GigaVac GV200MA. As mentioned, one of my prime...
Forum: Electrical Systems 05-23-2022, 10:48 AM
Replies: 16
Views: 1,165
Posted By Freemasm
Pulse Width Modulation, coil application

I'm ME but understand PWM and it's applications, or so I thought. What are the reasons, advantages/disadvantages, etc. of a PWM coil in a DC contactor?

Comparing the coil currents, something that's...
Forum: RV Building Tips/Techniques 05-21-2022, 07:22 AM
Replies: 9
Views: 1,255
Posted By Freemasm
Got a picture of the flange or dimensions? I...

Got a picture of the flange or dimensions? I have some old, not RV10 tanks. If I can find the needed part on them, I can drill it out and send it to you.
Forum: RV Ongoing Maintenance Issues 05-17-2022, 09:22 AM
Replies: 15
Views: 2,297
Posted By Freemasm
My apologies for the drift

Sorry but you made me think of something I haven't thought about in many decades. Pulling up some ancient memories so hopefully I still remember the details.

The design and subsequent fabrication of...
Forum: RV General Discussion/News 05-16-2022, 01:29 PM
Replies: 99
Views: 24,914
Posted By Freemasm
Swift Fuel Deleivered in FL.

@Carl.

My friend buys 94UL in bulk from a distributor here in FL. A reinforced 700 Gal.US tank is delivered to his property for ~15 - 20% more than the cheapest self serve around here; less than...
Forum: RV General Discussion/News 05-15-2022, 03:33 PM
Replies: 99
Views: 24,914
Posted By Freemasm
interesting posts but you're playing with fire in...

interesting posts but you're playing with fire in my humble opinion. Vapor pressure and it's consequences are fuel system design considerations. More specifically, it is more typically a fuel pump...
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