KR> Cable safe

[Christopher Pryce]

Here's an alternative if you're willing:

http://www.eaavideo.org/video.aspx?v=4605134888001

Chris Pryce
Burlington, NJ

KR> Flywheel alternators

[billjacobs...@yahoo.com]

Thanks Jeff,Good clear description.
Bill Jacobs


-- Original message--From: Jeff Scott via KRnet Date: Mon, Jun 13, 2016 
5:28 PMTo: krnet at list.krnet.org;Cc: Jeff Scott;Subject:Re: KR> Flywheel 
alternators"Flywheel Alternators" are more aptly described as Dynamo Charging 
systems.? They have fixed magnets that fly past a fixed Stator (coil or coils) 
to produce AC current and either a single or 3 phase A/C Output that is then 
rectified into DC.? A single phase unit either works or not as there are no 
moving parts to wear out.? If a wire breaks in the stator or beetween the 
stator and the regulator, it no longer works.? A 3 phase unit can lose a phase, 
which will reduce its max current output.? I expect the Great Planes units are 
likely single phase.? The regulator is where all the magic happens and where 
problems are most likely to occur.? The regulator both rectifies the AC output 
into DC, and regulates the DC to something less than 14.3 Volts.?Low voltage 
output will almost always be the regulator that's at fault.  No charging can be 
either the regulator, wiring, or the dynamo stator wires that have failed.?The 
failures I have seen in them were failed regulators, and burned wiring between 
the dynamo and the regulator, and broken wires in the dynamo.? It is possible 
that your regulator output may be affected by heat, but to what degree, I 
couldn't predict.? Since these systems don't typically charge at idle, you need 
to use a good voltmeter (preferably digital) and take a reading anywhere on the 
12V DC buss with the engine turning somewhere around 1500 - 2000 RPM.? I don't 
have any specific knowledge about the Great Planes units, so don't know what 
RPM they cut in, but the ones on the Jabiru engines I've been working on seem 
to start charging around 1800 rpm.? Once it's charging with minimal load, I 
would expect to see something on the order of a minimum of 13V to maintain the 
battery.? If it is less than that, they you are likely looking at a regulator 
issue.? The dynamo itself will either work, or it won't.?-Jeff ScottLos Alamos, 
NM?Sent:?Monday, June 13, 2016 at 2:02 PMFrom:?"Mike Stirewalt via KRnet" 
To:?krnet at list.krnet.orgCc:?laser147 at juno.comSubject:?KR> Flywheel 
alternatorsAnybody know if the flywheel alternators that are in the Great 
Plainsengines wear out with time? It seems my voltmeter needle is ridingaround 
11 volts instead of 12 with the engine at full RPM. It might bemy 
imagination.If they DO wear out with time, what needs to be replaced? What 
wears?I just aborted a trip to La Paz because the voltmeter needle seemed to 
beriding a little lower than it usually does. I didn't want to be comingback 
across the border without a working transponder so I landed in SanFelipe and 
just came back home. Better safe than sorry. This alternatorsituation worries 
me but it might be just fine and my imagination theproblem, not the alternator. 
It's got a lot of hours on it - theflywheel alternator I mean - and am 
wondering if I've got a 
problemdeveloping.Thanks,MikeKSEEAffordable
 Wireless PlansSet up is easy. Get online in minutes.Starting at only $9.95 per 
month!www.netzero.net?refcd=nzmem0216[http://www.netzero.net?refcd=nzmem0216]___Search
 the KRnet Archives at 
http://tugantek.com/archmailv2-kr/search[http://tugantek.com/archmailv2-kr/search].To
 UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.orgplease 
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KR> Cable safe

[Mark Langford]

Chris Pryce wrote:

 > Here's an alternative if you're willing:
 >
 > http://www.eaavideo.org/video.aspx?v=4605134888001

That's a great idea, but make sure it's in the right place the first 
time, because compression fittings are almost "forever"!  A dremel with 
a carborundum wheel would make quick work of it, but it's not something 
you'd want to do very often.

Personally mine are a fairly loose fit through the firewall...just 
shields and grommets, and the cable housing is clamped with a P-clamp 
very near the end.  This minimizes stretch of the housing between 
firewall and end point (mixture, throttle, whatever), and reduces 
freeplay.  I think I'll keep doing it my way...

Mark Langford
ML at N56ML.com
http://www.n56ml.com

KR> Cable safe

[Chris Gardiner]

Stef,
Have you tried Wicksaircraft.com?
Regards
Chris Gardiner

Sent from my iPad

> On Jun 13, 2016, at 8:07 PM, Stef den Boer via KRnet  list.krnet.org> wrote:
> 
> 
> The problem is aircraft spruce is out of stock and the manufactor company is 
> out
> of order or what ever. Is there some of you who has a new adres where I can 
> buy
> this item...
> 
> Thanks stef. 
> 
> 

KR> Ifly 720

[Jeff Scott]

?
?

Sent:?Monday, June 13, 2016 at 11:23 AM
From:?"Mark Langford via KRnet" 
To:?KRnet 
Cc:?ml at n56ml.com
Subject:?Re: KR> Ifly 720
Brian Kraut wrote:

> Ifly 720. I powered it up over the weekend and noticed that it
> took probably a minute or so to boot up and operation seems to not be
> very fast on it. I kind of expected that on their dedicated hardware
> that it would zip right along or at least run as good as it does on my
> phone that is also running 100 other processes at the same time. I also
> noticed that the touch screen requires a harder touch than my phone or
> tablet

Right on all counts! Mine probably takes well over two minutes to boot,
and the touch screen isn't as sensitive as in iPhone, which may be by
design. And the absence of an on/off switch is unforgiveable, as is the
absence of at least a tiny battery to get you through cycling other
power on or off for a few seconds. The other biggie is the super glossy
screen. It just doesn't work well in a plane with a canopy. I had to
buy another touch screen for mine for $120 after relatively little
usage, but the previous one had a non-glare sheet over it. I may have
even bought the non-glare thing...I forget, but I'm looking for another
one now.

Other than these nits, it's a great unit, but the conclusion I've drawn
is to run it on an iPad, which can be bought used for under $100, and
you get the best of both worlds. iPad hardware is pretty dang reliable
and trouble free. I'm using my daughter discarded after many years of
hard use, and everything on works like the day it was new. And what a
battery...

Mark Langford, Harvest, AL
ML "at" N56ML.com
www.N56ML.com[http://www.N56ML.com]
---

I had the exact same issues with my iFly 720.  Painfully slow boot up.  
Insensitive screen.  Mine also needed the screen recalibrated regularly. I 
liked their software, but the 720 unit seemed to have a few problems.  Mine 
finally lost it's mind about a year ago and needed the OS to be flashed onto it 
again.  I asked them to make me a deal to trade for an iFly 740.  All of those 
issues were addressed in the iFly 740.  It boots fast.  Has a much brighter 
screen that is more sensitive than the 720, but not overly sensitive like my 
Android unit.  And it has an internal battery that will run it for ~15 minutes. 
 And the WiFi on the 740 seems to work much better.

I also fly with an Android running the same iFly software.  I find it to be a 
bit overly sensitive when I'm flying in rough air, so it's easy to get the 
wrong things keyed in.  It's not nearly as bright as the iFly 740, but about 
the same as the iFly 720.  The android also seems to be susceptible to RF 
interference that knocks the WiFi off line, so it drops the connection to my 
ADS-B gear.  Yesterday, the Android overheated and shut down for ~30 minutes 
while sitting in the same bright sunlight right next to my iFly unit, so I 
would say the iFly unit is a bit more hardy in real world environments.  I 
never had my iFly 720 or 740 shut down due to heat, but the Android has quit 
twice requiring it to cool for about 30 minutes in front of a vent and out of 
the sunlight before it was functional again.

-Jeff Scott
Los Alamos, NM

KR> Cable safe

[codylee.cramer]

http://m.aircraftspruce.com/pages/ha/grommets/6000metalgrommets.php


Sent from my T-Mobile 4G LTE Device
 Original message From: Stef den Boer via KRnet  Date: 6/13/16  8:07 PM  (GMT-05:00) To: KRnet  Cc: Stef den Boer  Subject: KR> Cable 
safe 
Hi kr friends,

I need to order a calble safe
http://www.aircraftspruce.com/catalog/appages/cablesafe.php?clickkey=8218

The problem is aircraft spruce is out of stock and the manufactor company is out
of order or what ever. Is there some of you who has a new adres where I can buy
this item...

Thanks stef. 

Steph and his dad are building the KR-2S see http://www.masttotaalconcept.nl/kr2
http://www.masttotaalconcept.nl/kr2
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KR> Fwd: Re: Flywheel alternators

[Mark Langford]

After re-reading my post, let me amend it a bit.  Start on page 30 at 
"Flywheel Alternators" and read through page 32.  Mine is a 20A, but you 
could even have a 15A. You could also have a 30A, I suppose.  Mine 
charges at 14.3-14.4V anytime the engine is much above idle, and has 
plenty of current for 91JF's meager needs.

See
http://www.twinslan.net/~n0nas/manuals/onan/940-0751%20Onan%20NH%20(RV%20spec%20J-P)%20NHC,%20NHCV%20(spec%20E)%20Engine%20Service%20Manual%20(04-1987).pdf
 


Pages 31 and 32 are all you need to test regulator and generator. This 
is a "Synchro 20" I have this dumb-as-dirt single-phase system also, and 
it is surprisingly smooth voltage with zero EMI noise on the radio, or 
the rest of the system, best I can tell.

Given that these use permanent magnets, it is certainly conceivable that 
they could lose their magnetism over time, but I wouldn't expect it to 
happen quickly.  Regulator would be my first guess.

Mark Langford
ML at N56ML.com
http://www.n56ml.com

KR> Flywheel alternators

[Mark Langford]

Mike Stirewalt wrote:

 > Anybody know if the flywheel alternators that are in the Great Plains
 > engines wear out with time?  It seems my voltmeter needle is riding
 > around 11 volts instead of 12 with the engine at full RPM.  It might be
 > my imagination.

See
http://www.twinslan.net/~n0nas/manuals/onan/940-0751%20Onan%20NH%20(RV%20spec%20J-P)%20NHC,%20NHCV%20(spec%20E)%20Engine%20Service%20Manual%20(04-1987).pdf
 


Pages 31 (starting at "30A synchro system) and 32 (testing) are all you 
need to test regulator and generator.  I have this dumb-as-dirt 
single-phase system also, and it is surprisingly smooth voltage with 
zero EMI noise on the radio, or the rest of the system, best I can tell.

Given that these use permanent magnets, it is certainly conceivable that 
they could lose their magnetism over time, but I wouldn't expect it to 
happen quickly.  Regulator would be my first guess.

Mark Langford
ML at N56ML.com
http://www.n56ml.com


On 6/13/2016 3:02 PM, Mike Stirewalt via KRnet wrote:
> Anybody know if the flywheel alternators that are in the Great Plains
> engines wear out with time?  It seems my voltmeter needle is riding
> around 11 volts instead of 12 with the engine at full RPM.  It might be
> my imagination.
>
> If they DO wear out with time, what needs to be replaced?  What wears?
>
> I just aborted a trip to La Paz because the voltmeter needle seemed to be
> riding a little lower than it usually does.  I didn't want to be coming
> back across the border without a working transponder so I landed in San
> Felipe and just came back home.  Better safe than sorry.  This alternator
> situation worries me but it might be just fine and my imagination the
> problem, not the alternator.  It's got a lot of hours on it - the
> flywheel alternator I mean - and am wondering if I've got a problem
> developing.
>
> Thanks,
>
> Mike
> KSEE
>
>
> 
> Affordable Wireless Plans
> Set up is easy. Get online in minutes.
> Starting at only $9.95 per month!
> www.netzero.net?refcd=nzmem0216
>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
> options
>
>

KR> Flywheel alternators

[Rene Ffrench]

On the weak Alternator Thread:

  I think I am in the same low voltage situation,

  What have folks done in the past when that looked like a problem?

Thanks
N44774 KR2
Austin Texas




Virus-free.
www.avast.com

<#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Mon, Jun 13, 2016 at 4:02 PM, Mike Stirewalt via KRnet <
krnet at list.krnet.org> wrote:

> Anybody know if the flywheel alternators that are in the Great Plains
> engines wear out with time?  It seems my voltmeter needle is riding
> around 11 volts instead of 12 with the engine at full RPM.  It might be
> my imagination.
>
> If they DO wear out with time, what needs to be replaced?  What wears?
>
> I just aborted a trip to La Paz because the voltmeter needle seemed to be
> riding a little lower than it usually does.  I didn't want to be coming
> back across the border without a working transponder so I landed in San
> Felipe and just came back home.  Better safe than sorry.  This alternator
> situation worries me but it might be just fine and my imagination the
> problem, not the alternator.  It's got a lot of hours on it - the
> flywheel alternator I mean - and am wondering if I've got a problem
> developing.
>
> Thanks,
>
> Mike
> KSEE
>
>
> 
> Affordable Wireless Plans
> Set up is easy. Get online in minutes.
> Starting at only $9.95 per month!
> www.netzero.net?refcd=nzmem0216
>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
> options
>



-- 
Cheers,
Rene'

lrffrench at gmail.com
+1-512-547-7164

KR> Flywheel alternators

[Larry Flesner]

At 03:02 PM 6/13/2016, you wrote:
>Anybody know if the flywheel alternators that are in the Great Plains
>engines wear out with time?



Any way to check it with a known good volt meter?  The aircraft meter 
may not be accurate.  What does your buss voltage read with the 
engine shut down?

Larry Flesner

KR> Flywheel alternators

[laser147 at juno.com]

Anybody know if the flywheel alternators that are in the Great Plains
engines wear out with time?  It seems my voltmeter needle is riding
around 11 volts instead of 12 with the engine at full RPM.  It might be
my imagination.  

If they DO wear out with time, what needs to be replaced?  What wears?  

I just aborted a trip to La Paz because the voltmeter needle seemed to be
riding a little lower than it usually does.  I didn't want to be coming
back across the border without a working transponder so I landed in San
Felipe and just came back home.  Better safe than sorry.  This alternator
situation worries me but it might be just fine and my imagination the
problem, not the alternator.  It's got a lot of hours on it - the
flywheel alternator I mean - and am wondering if I've got a problem
developing.

Thanks, 

Mike
KSEE



Affordable Wireless Plans
Set up is easy. Get online in minutes.
Starting at only $9.95 per month! 
www.netzero.net?refcd=nzmem0216

KR> KR progress report.

[Alastair Hawkins]

Sent with AquaMail for Android
http://www.aqua-mail.com


On June 12, 2016 6:33:16 PM Mike Sylvester via KRnet  
wrote:

> So darn close I'm already getting that KR grin [?] . I've started the 
> painting process and will be taking a week off to try to get her finished 
> by the end of the month. With that being said, I have a 1966 Cessna 150 in 
> great condition that needs a new home, I need the hanger space. More 
> updates to come.
>
>
> Mike Sylvester
> kr2s builder
> Birmingham,AL.
>
> Cell no.205-966-3854
>
>
> --
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
> options
>

KR> Ifly 720

[ml at n56ml.com]

Brian Kraut wrote:

> Ifly 720.  I powered it up over the weekend and noticed that it
> took probably a minute or so to boot up and operation seems to not be
> very fast on it.  I kind of expected that on their dedicated hardware
> that it would zip right along or at least run as good as it does on my
> phone that is also running 100 other processes at the same time.  I also
> noticed that the touch screen requires a harder touch than my phone or
> tablet 

Right on all counts!  Mine probably takes well over two minutes to boot,
and the touch screen isn't as sensitive as in iPhone, which may be by
design.  And the absence of an on/off switch is unforgiveable, as is the
absence of at least a tiny battery to get you through cycling other
power on or off for a few seconds.  The other biggie is the super glossy
screen.  It just doesn't work well in a plane with a canopy. I had to
buy another touch screen for mine for $120 after relatively little
usage, but the previous one had a non-glare sheet over it.  I may have
even bought the non-glare thing...I forget, but I'm looking for another
one now.

Other than these nits, it's a great unit, but the conclusion I've drawn
is to run it on an iPad, which can be bought used for under $100, and
you get the best of both worlds.  iPad hardware is pretty dang reliable
and trouble free.  I'm using my daughter discarded after many years of
hard use, and everything on works like the day it was new.  And what a
battery...

Mark Langford, Harvest, AL
ML "at" N56ML.com
www.N56ML.com

KR> [CorvAircraft] Prop

[brian.kraut at eamanufacturing.com]

I spoke to Ed Sterba about that a few years ago and he told me that low
drag planes like the KR and the Midget Mustang can go faster than the
theoretical pitch will allow.

I am not a prop expert, but if I had to take a wild guess as to a theory
which may or may not be correct I would look at this.  Prop pitch is not
as simple as the angle of incidence of the airfoil.  A propeller is not
a screw that exactly moves so many inches forward for each revolution. 
For one thing, it is an airfoil, not just a flat surface.  It is not
"screwing" its way through the air, it is creating lift 90 degrees to
the axis it is spinning.  And if it were a screw you need to remember
that the root is a much higher pitch than the tips so the prop would
"screw" its way further at the root than the tip.  The effective
distance it would "screw" forward is somewhere between the pitch of the
root and the pitch of the tip and depends on the drag of the plane.

Or to sum it all up, it is PFM and black magic and the formula, as Mark
says, does not always fit, it is a rule of thumb to get an approximation
only.


 Original Message 
Subject: Re: KR> [CorvAircraft] Prop
From: Mark Langford via KRnet 
List-Post: krnet@list.krnet.org
Date: Sun, June 12, 2016 7:32 pm
To: CorvAircraft , 'KRnet'

Cc: Mark Langford 

That equation has never worked for me either. If it makes anybody feel 
any better, Joe Horton reminded me today that he can reproduce 180 mph 
TAS on a regular basis, and his ASI system is well calibrated. He also 
has a nosewheel out front. Temperature and altitude are factors, and of 
course RPM and weight of the plane.

I flew the KR2 (old wing) with a 54x50 prop today at WOT at 168 mph TAS 
at about 2500 ft, so I'm getting over 100% efficiency. Bottom line is 
this equation doesn't fit KRs. Properly built, they are simply more 
efficient than most airplanes out there, especially at the time that 
equation was probably hatched...I'm guessing the early 1940's.

Mark Langford
ML at N56ML.com
http://www.n56ml.com



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KR> Ifly 720

[brian.kraut at eamanufacturing.com]

I have been using the Ifly GPS app on my tablet and phone for over a
year and love it.  I recently got a new project (Murphy Rebel) that came
with an Ifly 720.  I powered it up over the weekend and noticed that it
took probably a minute or so to boot up and operation seems to not be
very fast on it.  I kind of expected that on their dedicated hardware
that it would zip right along or at least run as good as it does on my
phone that is also running 100 other processes at the same time.  I also
noticed that the touch screen requires a harder touch than my phone or
tablet (which may be a good thing bouncing around in the cockpit)

Can any of you that run the 720 comment on this?  I am wondering if this
is normal or if mine might have some issues.

Also, did they hide a power button the unit somewhere that I just have
not found yet?

KR> KR progress report.

[Mike Sylvester]

So darn close I'm already getting that KR grin [?] . I've started the painting 
process and will be taking a week off to try to get her finished by the end of 
the month. With that being said, I have a 1966 Cessna 150 in great condition 
that needs a new home, I need the hanger space. More updates to come.


Mike Sylvester
kr2s builder
Birmingham,AL.

Cell no.205-966-3854
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