MOSAIC Rule Today?

This KCAS business has me squinting really closely at my POH.

The clean stall speed of the PA28R-201 is 60KIAS. So how much is that in KCAS? Let's look at the performance table:
Screenshot 2025-07-26 at 10.22.16 AM.png
That sure looks like 60KIAS is 59KCAS to me!
 
I'm surprised only 1300 people commented (including manufacturers/suppliers).
 
Mother of Muppets if you’re the average that means they got 400 responses!
 
I’ve been putting the EE into “GEEK” since 1984.
Gave up Geekdom when I met my wife to be after graduation from HS and before Engineering School. She demanded it. Saved me from a life of ridicule ;) :biggrin:
 
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Just a comment on the likely outcomes if insurance companies throw a wet blanket on our party and require at a minimum Basic Med.

I suspect there will be a big shift in 'self insuring'. It all comes down to ones acceptable risk.

My BM is good until early 27'. Hopefully the insurance companies accept the risk the FAA did, given they are different.
 
I asked AI to review the MOSAIC document and provide analysis on where my 1969 PA28-140 stands under the new Mosaic rule.

=======================================================

Yes, under the new MOSAIC rule, it is very likely that a 1969 Piper Cherokee 140 (PA-28-140) will become eligible to be operated by a sport pilot without an FAA medical, provided that the aircraft falls within the expanded criteria and the pilot holds a valid U.S. driver’s license.

Here’s how the MOSAIC rule changes affect this:​

✅ Sport Pilot Privileges Expanded (Under MOSAIC)​

  • The new rule removes the former max weight limit (1,320/1,430 lbs) for aircraft operated by sport pilots.
  • Instead of weight, the limitation is now based on stall speed and number of occupants.
  • Sport pilots may now fly aircraft with up to 4 seats, but may still only carry one passenger (i.e., 2 occupants max during operation).
  • Sport pilots may operate airplanes with a maximum stall speed (VS1) of up to 59 knots CAS (per § 61.316(a)(1) under the new rule).

✅ Medical Certification Not Required​

  • The final rule retains the driver’s license medical option for sport pilots.
  • So, if a pilot has a valid U.S. driver’s license and was not denied an FAA medical, they can fly under sport pilot privileges.

❓ PA-28-140 Eligibility​

To confirm a 1969 PA-28-140 qualifies under MOSAIC:
  • The stall speed (VS1) of a stock PA-28-140 is about 55 knots CAS, which is below the new 59-knot CAS limit.
  • It is a 4-seat aircraft, but sport pilots can legally operate it with only one passenger.
  • Therefore, it meets the new stall speed and seating criteria, making it eligible under MOSAIC.

✅ Summary​

RequirementMeets Criteria?
≤ 4 seats✅ Yes
Max 2 occupants during operation✅ Yes (pilot + 1)
Stall speed ≤ 59 knots CAS✅ Yes (~55 knots)
Driver’s license in lieu of FAA medical✅ Yes

Final Considerations:​

  • Training & Endorsements: If you plan to operate at night or use retractable gear or a constant-speed propeller, MOSAIC requires additional training and endorsements.
  • The rule becomes effective October 22, 2025, so this change does not apply until then.
If you’d like help locating the exact language in the CFR amendments that pertains to the Piper 140’s eligibility or how to legally operate it as a sport pilot after October 2025, I can assist further.
 
We've never had any problem getting insurance for any of us flying with or without a medical. It's been a complete non-issue. Of course that's in an RV-12, so it's to be expected that people without medicals will be flying it... but realistically, what's the diff between that and, say, a Cherokee or 172? I think the insurers are going to care a lot more about transition training than medicals. Competition will take care of the rest.
 
We've never had any problem getting insurance for any of us flying with or without a medical. It's been a complete non-issue. Of course that's in an RV-12, so it's to be expected that people without medicals will be flying it... but realistically, what's the diff between that and, say, a Cherokee or 172? I think the insurers are going to care a lot more about transition training than medicals. Competition will take care of the rest.
Are you sure? Maybe for a 172, but with LSAs opening up to complex retracts.....?

I'm guessing that insurance companies are scrambling to figure out what this will mean for them.
 
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We've never had any problem getting insurance for any of us flying with or without a medical. It's been a complete non-issue. Of course that's in an RV-12, so it's to be expected that people without medicals will be flying it... but realistically, what's the diff between that and, say, a Cherokee or 172? I think the insurers are going to care a lot more about transition training than medicals. Competition will take care of the rest.
Good point.

Speaking of transition training, the new rule pertaining to VFR night flight for sport pilot is focused on the SP pilot "moving up" to night flight. The requirement for night training with a log book endorsement makes sense.

However, the PPL who is "stepping down" to SP, letting his medical or Basic Med cert expire, will need the same training and endorsements to fly VFR night. Even though he may have logged 20 hours of night flight in the last 30 days and has a logbook with 100's of hours of night flight. :dunno:
 
Good point.

Speaking of transition training, the new rule pertaining to VFR night flight for sport pilot is focused on the SP pilot "moving up" to night flight. The requirement for night training with a log book endorsement makes sense.

However, the PPL who is "stepping down" to SP, letting his medical or Basic Med cert expire, will need the same training and endorsements to fly VFR night. Even though he may have logged 20 hours of night flight in the last 30 days and has a logbook with 100's of hours of night flight. :dunno:
If you have a PPL you had to have night flight training, so wouldn't the PPL cover the training requirement and act as a de facto endoresement?

You're not losing your PPL, you're just exercising privileges of a lower rating.
 
If you have a PPL you had to have night flight training, so wouldn't the PPL cover the training requirement and act as a de facto endoresement?
I would think. But as it is written, there is no specific provision for that.

If I remember correctly this reminds me of the 250 mile dual cross country requirement for commercial. At that time I had hundreds of hours x-country time.

You're not losing your PPL, you're just exercising privileges of a lower rating.
IDK, Since we would be operating under Sport Pilot privileges the letter of the rule for SP privilege prevails?
 
If you have a PPL you had to have night flight training, so wouldn't the PPL cover the training requirement and act as a de facto endoresement?

You're not losing your PPL, you're just exercising privileges of a lower rating.
Yes.
 
I'm guessing that insurance companies are scrambling to figure out what this will mean for them.
This. And, some insurance companies are already requiring medicals for older pilots even though the regs allow basicmed or SP/DL.
However, the PPL who is "stepping down" to SP, letting his medical or Basic Med cert expire, will need the same training and endorsements to fly VFR night. Even though he may have logged 20 hours of night flight in the last 30 days and has a logbook with 100's of hours of night flight.
No. The endorsement shows you have the required training. A PP certificate shows you have the training. And, even before MOSAIC the FAA has already clarified that a PP or higher doesn't need any of the endorsements a certificated SP would need (other than tailwheel, high performance, or complex, which the PP would need anyway).
 
Are you sure? Maybe for a 172, but with LSAs opening up to complex retracts.....?
I'm struggling to see what having or not having a medical certificate has to do with operating complex or retracts. The underwriters are already going to whack you pretty hard for those things if you have low hours, lack of experience, and advancing age. Take the case of a PP who's under retirement age with complex and HP time... he's going to let his medical expire and fly with SP privileges, day VFR only and under 10K. People have been flying for 20 years or so without medical certificates and the record has been pretty good for accidents and incidents caused by medical issues.

I'm guessing that insurance companies are scrambling to figure out what this will mean for them.
Probably. I'm guessing there may initially be a couple of insurers who will resist issuing policies for SP flying complex, HP, retracts, and so on - and there will be several who don't, and eventually competitive forces and statistics will even things out. It just feels to me like the FAA and insurance underwriters have about the same risk appetite.
 
Are you sure? Maybe for a 172, but with LSAs opening up to complex retracts.....?

I'm guessing that insurance companies are scrambling to figure out what this will mean for them.
As if they have'nt had months if not years to figure it out already. If the're "Scrambling", they shouldn't be in the business in the first place.
 
If they didn’t know what the final rule would look like, they couldn’t properly prepare in advance.
IMNSHO, not much changed for Pilots except the stall speed. The basics of expanded opportunities for Sport Pilots were essentially the same from the initial to the final from my perspective. Prudent management would study each potential tweak like stall speed, night flying or similar prior to a final rule. If you wait for the final final final to decide what to do, good luck. YMMV.
 
IMNSHO, not much changed for Pilots except the stall speed. The basics of expanded opportunities for Sport Pilots were essentially the same from the initial to the final from my perspective. Prudent management would study each potential tweak like stall speed, night flying or similar prior to a final rule. If you wait for the final final final to decide what to do, good luck. YMMV.
My experience is that “prudent management” doesn’t generally spend money to study and develop a plan for something that isn’t set in stone.:dunno:
 
My experience is that “prudent management” doesn’t generally spend money to study and develop a plan for something that isn’t set in stone

I did a lot of "what If'" studies in my time. If this happens, we'll do this, If not, we'll do that. No detail plan but a general approach to different scenarios. Worth a little to avoid potential missteps in "Scrambling". I would hazard a guess some outfits are thinking about what to do if there is a 100% tariff on their overseas source of supply.

It is a matter of depth in the "What If" excersise. Sort of "What if the FAA allows an IFR in VMC type rating?. We'll require Lower/Higher premiums. If it doesn't happen, then no problem. If it does, here's what we will do to decide." Or in the case of MOSAIC, "What if they raise the stall speed in the final version? We'll require additional transition training or raise premiums or do nothing." The specifics of what/how much comes after the rule is final so the insurance company can execute the plan to set somethig "in stone".

OTOH, another Course of Action is to wait till final final final, see what the competition does and then act. If I was in charge, I would have asked these questions before then. Not a lot of resources needed except some outline of a plan of action if something changes.
 
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Personally, I don't think we'll see much impact, insurance-wise, due to the implementation of MOSAIC. Twenty years of Sport Pilot have shown a very limited effect of the lack of a formal medical. Pilots with disqualifying medical conditions fly GA aircraft all the time. Cessna 172s are probably easier to fly than many of the skittish Light Sports on the market.

As I posted earlier, there were 142 accidents due to pilot incapacitation between 1998 and 2017. Nineteen of the pilots involved didn't posses a valid medical for the aircraft they were flying. Can't see that changing much.

In that same time period, there were 86 homebuilt accidents listed as pilot error, but with a note that the pilots had certain substances in their bloodstream. In over a third of the cases (38%), the presence of prescription drugs was listed as a potential contributing factor. So it's been happening all along.

With the collection of data over time, it might affect rates and coverage. But I think we're good for a while.

Ron Wanttaja
 
There are already new entrants into the MOSAIC field, some of them unexpected. Today a fellow announced he is buying the Christen brand from Aviat Husky, with the intent of offering factory built and builder assist Eagles under the new SP rules.
 
I feel like this is going to turn into a Super Thread, the likes of which we have not seen in a LONG time!
Which of the 717 pages of the doc defines what a Super Thread is? :D

I guess that makes sense. I wonder if all these new foreign planes being certified as experimental exhibition lately can be certified this way instead? Maybe that was Pipistrels plan for the panthera all along?
That's kinda what I'm guessing.
 
I almost put a deposit on this.
Don’t get your hopes up.

View attachment 143208
Sigh... https://en.wikipedia.org/wiki/LoPresti_Fury

Who was working on it last? Did they officially give up? Who owns the rights now?

That would be SUCH a fun little airplane. I hope it gets picked up again.

I'm still awaiting a return on my investment.

( @2-Bit Speed , you owe me. :) )
When my older son was about 2 or 3, he said "Let's go airport! I buy daddy King Air." If he comes through on that eventually, I'd say I got that return on my investment. :rofl:

the chinese steal. they dont invent. stole all of tesla’s technology because musk insisted on opening plants in china
Stole it... And then improved upon it to the extent that their tech is better than ours. They may steal, but they're not stupid.
 
Sigh... https://en.wikipedia.org/wiki/LoPresti_Fury

Who was working on it last? Did they officially give up? Who owns the rights now?

That would be SUCH a fun little airplane. I hope it gets picked up again.
Double sigh. I dug a little more and answered my own question.

I remember Corky Fornof flying the Swift Fury on the airshow circuit not overly long ago - 10-15 years ago. At that point it still sounded like they were going to try and produce it.

Alas, the LoPresti family donated the Fury, N217LP, to the Swift Museum Foundation in 2019 and stipulated that it not be flown. They have also returned all of the original Swift factory tooling that they had on loan from the Foundation. It will not go into production. :(
 
However, the PPL who is "stepping down" to SP, letting his medical or Basic Med cert expire, will need the same training and endorsements to fly VFR night. Even though he may have logged 20 hours of night flight in the last 30 days and has a logbook with 100's of hours of night flight. :dunno:

The thing is that for sport pilots to fly at night under the new rules, they need to have a medical certificate or qualify under BasicMed (§ 61.329(b)), so if you have a private certificate, I can’t see any circumstances under which you could fly at night using sport pilot privileges but couldn’t fly at night using your private pilot privileges. So there isn’t really any point to using sport pilot night privileges if you have a private cert.

I suppose in theory you could surrender (or the FAA could revoke) your private cert and then get a sport cert. I don’t think you would need to repeat the full three hours of night training and 10 night take-offs and landings, but you’d need to get the logbook endorsement. The same is probably true of other sport-pilot specific endorsements, like the class B/C/D endorsement and VH > 87 kts endorsement.
 
We've never had any problem getting insurance for any of us flying with or without a medical. It's been a complete non-issue. Of course that's in an RV-12, so it's to be expected that people without medicals will be flying it... but realistically, what's the diff between that and, say, a Cherokee or 172? I think the insurers are going to care a lot more about transition training than medicals. Competition will take care of the rest.
How old are you? I expect that insurers may have different requirements based on age. They may be skittish until the new LSA changes have played out for a few years and they have more claims data to crunch on.
 
How old are you? I expect that insurers may have different requirements based on age. They may be skittish until the new LSA changes have played out for a few years and they have more claims data to crunch on.
64, and not the youngest of the four of us. Nobody's hit 80 yet, though.
 
Double sigh. I dug a little more and answered my own question.

I remember Corky Fornof flying the Swift Fury on the airshow circuit not overly long ago - 10-15 years ago. At that point it still sounded like they were going to try and produce it.

Alas, the LoPresti family donated the Fury, N217LP, to the Swift Museum Foundation in 2019 and stipulated that it not be flown. They have also returned all of the original Swift factory tooling that they had on loan from the Foundation. It will not go into production. :(
I had a $10K deposit with LoPresti for a SwiftFury. Sad that they never got it to market. On the up side, at least when the project folded, they returned all of the deposits (with interest). Went toward my eventual airplane purchase in 2001.
 
I sure hope your medical opinions aren't arbitrary. I certainly wouldn't tell your malpractice carrier that.
I graduated from medical school in 1989 and have never been subject of lawsuit or any disciplinary action. My malpractice carrier couldn't be happier with my performance over the past 36 years.

What is an opinion exactly? From Webster " a view, judgment, or appraisal formed in the mind about a particular matter"

Under Basic Med there is not a concise set of standards of fitness. So as far as I'm concerned a physician's determination of a particular individual's fitness to fly is for all practical purposes an arbitrary opinion. I agree that there is significant potential liability for physicians who sign off the Basic Med form.
 
I graduated from medical school in 1989 and have never been subject of lawsuit or any disciplinary action. My malpractice carrier couldn't be happier with my performance over the past 36 years.

What is an opinion exactly? From Webster " a view, judgment, or appraisal formed in the mind about a particular matter"

Under Basic Med there is not a concise set of standards of fitness. So as far as I'm concerned a physician's determination of a particular individual's fitness to fly is for all practical purposes an arbitrary opinion. I agree that there is significant potential liability for physicians who sign off the Basic Med form.

The problem isn't with your usage of "opinion," it's the use of "arbitrary."

ARBITRARY - adjective; based on random choice or personal whim, rather than any reason or system​

Certainly you should have an opinion on a medical matter, but even without a "concise set of standards of fitness" being handed to you, is your opinion really based upon random choice or personal whim? Or is it based upon your training and experience as a physician and what an examination tells you about the examinee's physical condition? If you were examining the person to participate in some other physical activity, like swimming or jogging, would you need a USG body to lay out standards for you in order for you to render a reasonable medical opinion?

IMHO, you should be rendering an informed opinion, not an arbitrary one.
 
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