REFLECTOR: Hot Starts

Tue Feb 10 17:18:03 CST 2009

The hot start technique we use for our custom turbocharged IO-550N may not
be of the 'best form' but it works every time -- we 'pump' the throttle like
you would on a car, with a lot more time spent toward full open (than would
normally feel comfortable on the ground) -- and it always starts quickly.
You just must be ready to pull the throttle back to idle quickly.

They say you can run the Boost Pump on High for 30-60 seconds to recirculate
and cool the fuel and induction plumbing, but on our engine that just pumps
fuel overboard (via the cylinder intake drains) and doesn't seem to make it
much easier to start.

Bob Jackson
Custom Turbo IO-550N
N2XF

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Tuesday, February 10, 2009 11:27 AM
To: Jim Agnew; Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Hot Starts

I glued a piece of insulation to the bottom of the spider in my io360, 
which did help.  Haven't tried that yet on the 520.

Scott

Jim Agnew wrote:
> You can help the hard starting by placing a round piece of the stainless 
> steel/ceramic firewall covering between the injector spider and the 
> mounting bracket to help with the heat transfer via the bracket.
>  
> Jim
>  
> James F. Agnew
> Jim_Agnew_2 at Yahoo.Com
> Tampa, FL
> Velocity 173 Elite Aircraft Completed & Flying
> 
> 
> ------------------------------------------------------------------------
> *From:* "aminetech at bluefrog.com" <aminetech at bluefrog.com>
> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> *Sent:* Tuesday, February 10, 2009 10:53:44 AM
> *Subject:* Re: REFLECTOR: Hot Starts
> 
> Hot starting is difficult for me also.  I think the problem is that the 
> starter is hot from the heat under the cowl.  One thing I do that helps 
> a lot is to get things as cool as possible by planning a low power 
> decent, straight in if possible, and shut down asap after landing.  I am 
> concerned that I would have the same problem trying to re-start in the 
> air.  One of these days I plan to run a small cooling air line from the 
> plenum to the starter.
> 
> John
> 
> --- scott at tnstaafl.net <mailto:scott at tnstaafl.net> wrote:
> 
> From: Scott Derrick <scott at tnstaafl.net <mailto:scott at tnstaafl.net>>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org 
> <mailto:reflector at tvbf.org>>
> Subject: REFLECTOR: Hot Starts
> Date: Tue, 10 Feb 2009 07:20:21 -0700
> 
> My IO360 could be real persnickity about starting hot.  If you managed
> to get it on the first try all was well. If not, you were probably in
> trouble.
> 
> The T210's I fly have TSIO520's in them and are easy hot starters.
> Easiest I've ever flown. I think in 5 years  and 1500 hours I may have
> had 2 or 3 hard hot starts.  All of them right before a rebuild when
> the compression on quite a few cylinders were getting pretty low and
> doing the hot start in Phoenix in July after a 10 minute turn around.
> 
> I figured the TSIO520 I just installed would be the same way, an easy
> hot starter. No deal. My changes to the fuel system, or induction system
> or exhaust, or turbo or more likely the combination of all of them has
> turned it into a hot start beast.
> 
> One of those 3 handed, tongue twisting, pre-ignition prayer starting
> engines!
> 
> I haven't figured out the right combination yet but hopefully soon!
> 
> Scott
> 
> 
> Craig and Denise Woolston wrote:
>  > Rene-
>  >
>  > 
>  >
>  >  We have a Sky-Tec on our Cont. IO-550, so I can't answer all of your
>  > questions.  It's a "good" starter but I don't have anything to compare
>  > it to.  We never tried anything else.  But starting a hot fuel injected
>  > engine has been hard on the little guy.  We have burned one up in the
>  > first year and a half (approx. 200hrs).  Talking with Skytec they have
>  > said follow their rules; 3 burst of 10sec each and then wait 30min.
>  >  They rebuilt it for a couple hundred.  We have #2 gauge wire running
to
>  > it and a Odyssey battery and it sees less than a volt drop so I believe
>  > the ship is providing the best it can but they admit that it's a lot of
>  > heat to dissipate for the little guy.  It only weighs 8lbs.  They said
>  > they are working on improvements but said it will probably need to be
>  > rebuilt after two years.  This was a year and 150hrs ago.  Still
turning
>  > fine.  Cold starts are a no brainier.  The hot starts is where we
havn't
>  > quite perfected it.
>  >
>  > 
>  >
>  > Craig
>  >
>  > XL-5FG Flying in Lancaster, CA
>  >
>  > 
>  >
>  >
------------------------------------------------------------------------
>  >
>  > *From:* reflector-bounces at tvbf.org 
> <mailto:reflector-bounces at tvbf.org> [mailto:reflector-bounces at tvbf.org 
> <mailto:reflector-bounces at tvbf.org>]
>  > *On Behalf Of *Rene Dugas
>  > *Sent:* Saturday, February 07, 2009 7:21 PM
>  > *To:* Reflector
>  > *Subject:* REFLECTOR: Sky Tec Starter
>  >
>  > 
>  >
>  > Fellows,
>  >
>  > I have a D4A5 IO-540 260 hp on my XL Velo.  My Lamar is to be replaced
>  > and I am considering the Sky-Tec.  Which one fits the inline or the
>  > short side motor mounted one without cowl blisters?  Is one better than
>  > the other?    Is the High Torque needed for this improved starter? 
>  > Suggestions?
>  >
>  > Rene'
>  >
>  >
>  >
------------------------------------------------------------------------
>  >
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