Re: KRnet> Re: engine cost 0200 corvair

[Jeff Scott via KRnet]

 
 The IO-240 Continental is quite different from the O-200.  It is basically a 4 cylinder version of the Continentsl IO-360, which, IMHO, is a really solid engine.  It also shares most parts with the IO-360, which makes parts availability reasonable.  It would make a good engine for a scaled up, heavier KR and is comparable to a Lycoming O-235-L2C for performance.  For the right price, I would use one.-Jeff Scott--Sent from my Android phone with GMX Mail. Please excuse my brevity.On 4/21/23, 5:59 PM Flesner via KRnet  wrote:

  On 4/21/2023 5:45 PM, Flesner via KRnet wrote:
   >
   > Here is an engine that would make a rocket of a KR.
   
   https://www.barnstormers.com/classified-1525747-Cont-IO-240F-engine.html
   
   -- 
   KRnet mailing list
   KRnet@list.krnet.org
   https://list.krnet.org/mailman/listinfo/krnet
   
 

-- 
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet

Re: KRnet> engine cost 0200 corvair

[Jeff Scott via KRnet]

The O-200 has been a bargain engine for some time.  However, more recently machine services, cylinders, crankshafts and other parts costs have skyrocketed.  An O-200 with a serviceable crankshaft is a bargain.  An O-200 without a serviceable crankshaft is a door stop.  A new crankshaft now exceeds $8000.  Compare that to the $1670 I paid for the new crank for the O-200 I had on my KR in 1999.   Same goes for the Lycoming engines. 

 

I just completed a MOH of an O-290 Lycoming as a pro bono service for the local EAA Chapter.  I threw in several hundred $$ of materals from my own inventory.  The only outside services we paid for were to have the crankshaft and camshaft machined and basic cylinder overhaul.  That added up to nearly $5000 in machine shop services, and close to $10,000 in parts by the time I was done.  This included me going through the carb,  outside overhaul of magnetos, new harnesses, new bearings, pistons, rings, starter, alternator, regulator, engine mount, and mount bushings.  However, this engine is like new and ready to bolt on and fly. 

 

The days of a $10,000 overhaul for an aircraft engine are gone and this makes the Corvair a more attractive engine for planes like the KR.  Would I go that route?  No.  But that's me and based on my experience and my budget.  My opinion by no means should be construed to say choosing another engine platform is wrong for anyone else.

 

I have a C-85 with O-200 crank build to do as soon as I have the time available.  It's just not an inexpensive proposition anymore.

 

-Jeff Scott

Arkansas Ozarks

A&P/IA

 

 

 
 

Sent: Friday, April 21, 2023 at 4:54 PM
From: "Steve Loebs via KRnet" 
To: "KRnet" 
Cc: "Steve Loebs" 
Subject: Re: KRnet> engine cost 0200 corvair


Yeah, I thought the "$10,000 +/- 40% either way" was a typo, that is why I asked you twice.
 


On Fri, Apr 21, 2023 at 1:35 PM Flesner via KRnet  wrote:

On 4/21/2023 1:49 PM, Steve Loebs via KRnet wrote:
> Since you have experience with the O200, what is a rough low end price
> for an O200 that has just been overhauled?

+





-- 
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet

KRnet> Request for KR-1 Stalling Data

[kiwi faulkner via KRnet]

Greetings KR Enthusiasts

I am in the process of restoring New Zealand's only KR-1 which was completed - 
as per the plans - in the late seventies and has sat in storage for some 
20-plus years since last flying.  Of note is the fact that this aeroplane had 
no static system, and the static inlets of the ASI and ALT were simply left 
open behind the instrument panel.

Since the aircraft was built the regulatory oversight process has changed and 
the 'microlight' category has been introduced.  Interestingly, all New Zealand 
KR-2's are categorised as class 2 microlights and this makes aircraft ownership 
considerably more straightforward and of course, less costly.

I would like to re-register this aircraft as a microlight.  Alas the Civil 
Aviation Authority here have cited the original 1978 flight test report in 
which the owner recorded the MAUW (750lb) stalling speed power off in level 
flight as 55 knots indicated.   This is 10 knots faster than permitted for a 
microlight, and some 18 mph faster than the designer's stated figure of 45 mph. 
 Curiously, the stalling speed in a turn for this aircraft was noted as 50 
knots indicated - that is to say, the stalling speed is recorded as decreasing 
with increasing load factor (!).

Something is amiss with this data - but alas the Authority is maintaining its 
position.

Could I therefore humbly request that anybody out there with direct experience 
flying (and moreover stalling) an unmodified KR-1 at design MAUW (750lb) pass 
me the registration and stalling speed indicated.  Or alternatively contact 
information for anybody not following this list with such experience.

My thanks in advance for your consideration and assistance.

Kiwi

-- 
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet

Re: KRnet> engine cost 0200 corvair

[MS]

If a forged crankshaft,electronic ignition & twin plugs,=Steve's Prop Hub and 
naintenace of 25 hour  valve adsustment & oil shange and some very minor 
improvements, the 2180 there's not a more reliable engine if flown high *for 
cooling and less drag) and 75% power except for takeoff and climb thare's not a 
more reliable and inexpensive engine for that various mods of the KR.  I have 
an Ellison and run it very lean.  I expect it to last longer than I do.  

Revmaster another great choice, time tested.  

Inexpensive engines, especially Steve's where the easy parts are done.  

There are some fancy engines out there, if one want to spend $2500 but the time 
the project is finished.  

I've love to have the 3100 Corvair with the 3rd generation crank, but I'm happy 
with with I've got. 

Mike
-- 
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet

Re: KRnet> Request for KR-1 Stalling Data

[Kevin Stolhammer via KRnet]

This won't help you, as my KR1 buffets at 62 mph.(53 kts).  Haven't taken
it into full stall yet.  That was with retracts down.  Plane is pretty much
to plans, tho heavy (785 lbs) as flown.  It now has fixed gear,  but it's
not back in the air yet. Someday...
Kevin Stolhammer
kstolham...@gmail.com


On Sat, Apr 22, 2023, 6:21 PM kiwi faulkner via KRnet 
wrote:

> Greetings KR Enthusiasts
>
> I am in the process of restoring New Zealand's only KR-1 which was
> completed - as per the plans - in the late seventies and has sat in storage
> for some 20-plus years since last flying.  Of note is the fact that this
> aeroplane had no static system, and the static inlets of the ASI and ALT
> were simply left open behind the instrument panel.
>
> Since the aircraft was built the regulatory oversight process has changed
> and the 'microlight' category has been introduced.  Interestingly, all New
> Zealand KR-2's are categorised as class 2 microlights and this makes
> aircraft ownership considerably more straightforward and of course, less
> costly.
>
> I would like to re-register this aircraft as a microlight.  Alas the Civil
> Aviation Authority here have cited the original 1978 flight test report in
> which the owner recorded the MAUW (750lb) stalling speed power off in level
> flight as 55 knots indicated.   This is 10 knots faster than permitted for
> a microlight, and some 18 mph faster than the designer's stated figure of
> 45 mph.  Curiously, the stalling speed in a turn for this aircraft was
> noted as 50 knots indicated - that is to say, the stalling speed is
> recorded as decreasing with increasing load factor (!).
>
> Something is amiss with this data - but alas the Authority is maintaining
> its position.
>
> Could I therefore humbly request that anybody out there with direct
> experience flying (and moreover stalling) an unmodified KR-1 at design MAUW
> (750lb) pass me the registration and stalling speed indicated.  Or
> alternatively contact information for anybody not following this list with
> such experience.
>
> My thanks in advance for your consideration and assistance.
>
> Kiwi
>
> --
> KRnet mailing list
> KRnet@list.krnet.org
> https://list.krnet.org/mailman/listinfo/krnet
>
-- 
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet