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Hot Starts Lycoming?

 
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pilot4profit(at)sbcglobal
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PostPosted: Sat Dec 09, 2006 8:07 am    Post subject: Hot Starts Lycoming? Reply with quote

Any one care to share their hot start tips?????
CS


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Tim(at)MyRV10.com
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PostPosted: Sat Dec 09, 2006 8:36 am    Post subject: Hot Starts Lycoming? Reply with quote

I have the plain Bendix/Precision style silverhawk injection.

For a hot start:

No prime
Throttle cracked about 1/4-1/2"
Mixture full lean to cutoff
While cranking, as soon as it fires, rapidly move the mixture to
the normal ground lean range....maybe 1" back from full rich.
Then add or remove throttle as necessary.

When I've failed, it's because I didn't get the mixture
forward in time and it didn't stay running, and expecially
at first I was confused as to how to proceed from there....
prime, no prime, mixture cutoff, or leave it where it is.
Even back when I messed up a little, I still was able to
get it started within a couple attempts. Now days I just
don't fail the first time as often.

I still don't really have a procedure figured out for
a perfect recovery from a failed start, because it hasn't
happened more than maybe 5-6 times since I started flying,
but generally I think I'd actually give it a quick prime
and go idle cutoff for the reattempt. That one would need
some experimentation, and I'd rather just do it right
the first time. Wink

Tim Olson - RV-10 N104CD - Flying
do not archive
C Smith wrote:
Quote:


Any one care to share their hot start tips?????
CS




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mritter509(at)msn.com
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PostPosted: Sat Dec 09, 2006 9:28 am    Post subject: Hot Starts Lycoming? Reply with quote

I also have the Bendix injection system. The Lycoming engine manuel has the
following advice on hot starts:

"Because fuel percolates the system must be cleared of vapor: it is
recommended the same procedure for starting a cold engine be used for
starting a hot engine"

Don't know if this procedure assumes you have a fuel return line but it has
worked in my rather limited experience - 50 hrs. and waiting on paint shop
to finish. Tim's idea of not turning on the boost pump may prevent from
having to go to a flooded start procedure.

On another subject - I'm working on an RV-10 POH. Does anyone have a
completed POH that could be used to compare?

Mark (N410MR)


Quote:
From: Tim Olson <Tim(at)MyRV10.com>
Reply-To: rv10-list(at)matronics.com
To: rv10-list(at)matronics.com
Subject: Re: Hot Starts Lycoming?
Date: Sat, 09 Dec 2006 10:34:52 -0600



I have the plain Bendix/Precision style silverhawk injection.

For a hot start:

No prime
Throttle cracked about 1/4-1/2"
Mixture full lean to cutoff
While cranking, as soon as it fires, rapidly move the mixture to
the normal ground lean range....maybe 1" back from full rich.
Then add or remove throttle as necessary.

When I've failed, it's because I didn't get the mixture
forward in time and it didn't stay running, and expecially
at first I was confused as to how to proceed from there....
prime, no prime, mixture cutoff, or leave it where it is.
Even back when I messed up a little, I still was able to
get it started within a couple attempts. Now days I just
don't fail the first time as often.

I still don't really have a procedure figured out for
a perfect recovery from a failed start, because it hasn't
happened more than maybe 5-6 times since I started flying,
but generally I think I'd actually give it a quick prime
and go idle cutoff for the reattempt. That one would need
some experimentation, and I'd rather just do it right
the first time. Wink

Tim Olson - RV-10 N104CD - Flying
do not archive
C Smith wrote:
>
>
>Any one care to share their hot start tips?????
>CS



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jesse(at)itecusa.org
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PostPosted: Sat Dec 09, 2006 1:09 pm    Post subject: Hot Starts Lycoming? Reply with quote

I think my dad uses the same as for cold start, maybe not running the boost
pump quite as long. He has the Bendix injection with 2 Slick mags and a
Slick Start.

Mixture Rich
Throttle In
Boost Pump 3-4 seconds
Mixture Lean Cutoff
Throttle 1/2" in or so
Crank till fires
Mixture Rich
Throttle Idle

Seems to work pretty well with over 300 hrs so far.

Do not archive.

Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org
www.itecusa.org
W: 352-465-4545
C: 352-427-0285

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pilot4profit(at)sbcglobal
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PostPosted: Sat Dec 09, 2006 1:12 pm    Post subject: Hot Starts Lycoming? Reply with quote

Subject: Re: Hot Starts Lycoming?



I also have the Bendix injection system. The Lycoming engine manuel has the

following advice on hot starts:

"Because fuel percolates the system must be cleared of vapor: it is
recommended the same procedure for starting a cold engine be used for
starting a hot engine"

Don't know if this procedure assumes you have a fuel return line but it has
worked in my rather limited experience - 50 hrs. and waiting on paint shop
to finish. Tim's idea of not turning on the boost pump may prevent from
having to go to a flooded start procedure.

Unfortunately this doesn't work in my '04 T182T. Thanks for offering just
the same. I'm just trying to see what others are doing and what works for
them.
CS


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Tim(at)MyRV10.com
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PostPosted: Sat Dec 09, 2006 3:05 pm    Post subject: Hot Starts Lycoming? Reply with quote

Yeah, I'm sure that it's going to be somewhat dependent on
what engine, what injection system, and even what installation
airframe (cowl heat and stuff like that) that you have, so as
always, YMMV. It's funny, when I run into bonanza pilots and
some people I've flown and been around, they all seem to jump
on me with their ideas. Many have even told me before they
even asked, that I should do it the way I am. It just seems
to be that once you find the method that works for you, you
should stick with it. Fortunately, from the few posts we've
had already, you can tell that in the RV-10, with an IO-540,
using the Bendix system, there are already a few ways that
have acceptable results.

One thing for sure, when my engine is cold, (or just unplugged
in this season), it sure pops off extremely quickly. I
hardly have time to turn the key all the way and it's
running. People who take rides are often amazed it starts
without the usual cranking and 5-10 prop revolutions that
you sometimes see on the airfield.

Tim Olson - RV-10 N104CD - Flying
do not archive
C Smith wrote:
Quote:




Subject: Re: Hot Starts Lycoming?



I also have the Bendix injection system. The Lycoming engine manuel has the

following advice on hot starts:

"Because fuel percolates the system must be cleared of vapor: it is
recommended the same procedure for starting a cold engine be used for
starting a hot engine"

Don't know if this procedure assumes you have a fuel return line but it has
worked in my rather limited experience - 50 hrs. and waiting on paint shop
to finish. Tim's idea of not turning on the boost pump may prevent from
having to go to a flooded start procedure.



Unfortunately this doesn't work in my '04 T182T. Thanks for offering just
the same. I'm just trying to see what others are doing and what works for
them.
CS


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apilot2(at)gmail.com
Guest





PostPosted: Sat Dec 09, 2006 4:16 pm    Post subject: Hot Starts Lycoming? Reply with quote

I can tell you what works on my Lyc IO360-A1A with Bendix injection.
Leave mixture idle cutoff. Turn boost pump on just long enough to see
15lbs or more pressure.maybe 2 sec. Advance throttle to about 1/2".
Begin cranking. After about 5-6 blades, begin easing mixture forward
slowly. Somewhere around 1/3 of mixture travel engine will fire and
bring mixture up to maybe 2/3s and reducing throttle to 1000 rpm.
Has been very reliable for 500 hrs. I have Bendix shower of sparks
retard breaker mags and Skytec lightweight starter, which certainly
contributes with much faster crank speed.
If first try doesn't suceed...rare, but happens..wait a minute for
starter to cool, try again. If that fails, go to flooded start
procedure. 4 cyl Lycomings aren't very prone to flooding.
Cold start...wait min. 30 seconds after priming before cranking. It
lets fuel vaporize and makes for very quick start.

On 12/9/06, Tim Olson <Tim(at)myrv10.com> wrote:
Quote:


Yeah, I'm sure that it's going to be somewhat dependent on
what engine, what injection system, and even what installation
airframe (cowl heat and stuff like that) that you have, so as
always, YMMV. It's funny, when I run into bonanza pilots and
some people I've flown and been around, they all seem to jump
on me with their ideas. Many have even told me before they
even asked, that I should do it the way I am. It just seems
to be that once you find the method that works for you, you
should stick with it. Fortunately, from the few posts we've
had already, you can tell that in the RV-10, with an IO-540,
using the Bendix system, there are already a few ways that
have acceptable results.

One thing for sure, when my engine is cold, (or just unplugged
in this season), it sure pops off extremely quickly. I
hardly have time to turn the key all the way and it's
running. People who take rides are often amazed it starts
without the usual cranking and 5-10 prop revolutions that
you sometimes see on the airfield.

Tim Olson - RV-10 N104CD - Flying
do not archive
C Smith wrote:
>
>
>
>
> Subject: Re: Hot Starts Lycoming?
>
>
>
> I also have the Bendix injection system. The Lycoming engine manuel has the
>
> following advice on hot starts:
>
> "Because fuel percolates the system must be cleared of vapor: it is
> recommended the same procedure for starting a cold engine be used for
> starting a hot engine"
>
> Don't know if this procedure assumes you have a fuel return line but it has
> worked in my rather limited experience - 50 hrs. and waiting on paint shop
> to finish. Tim's idea of not turning on the boost pump may prevent from
> having to go to a flooded start procedure.
>
>
>
> Unfortunately this doesn't work in my '04 T182T. Thanks for offering just
> the same. I'm just trying to see what others are doing and what works for
> them.
> CS



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Ray.R.Doerr(at)sprint.com
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PostPosted: Mon Dec 11, 2006 8:50 am    Post subject: Hot Starts Lycoming? Reply with quote

Sure.

Mixture full out
Throttle 1/8"
Crank engine until it fires, then immediately set Mixture all in and turn on Boost pump.

I found that sometimes if you don't get the boost pump on right after it fires, the engine will fire and run for 2 seconds or so then quit. I believe this is because it burns up all the fuel in the cyclinders from the hot start conditions and then it doesn't have new fuel to continue running. By the way the boost pump can then be turned off about 10 seconds after the start.

Thank You
Ray Doerr
40250
N519RV Flying and 188 on the Hobbs.
--


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