Today's Message Index:
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1. 12:52 AM - Any hot start problems with fuel injection? (loray@compuserve.com)
2. 05:49 AM - Re: Any hot start problems with fuel injection? (N395V)
3. 08:30 AM - Re: Re: Any hot start problems with fuel injection? (Darin Bishop)
4. 02:08 PM - Re: Re: Any hot start problems with fuel injection? (George Coy)
5. 02:17 PM - Re: Any hot start problems with fuel injection? (N395V)
6. 02:23 PM - Re: Any hot start problems with fuel injection? (N395V)
7. 03:41 PM - Re: Re: Any hot start problems with fuel injection? (A. Dennis Savarese)
8. 04:11 PM - Re: Any hot start problems with fuel injection? (N395V)
Message 1
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| Subject: | Any hot start problems with fuel injection? |
Hi Milt:
Have you experienced any hot start problems with the fuel injection
system?
Thanks,
Loray
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| Subject: | Re: Any hot start problems with fuel injection? |
Not as yet but I have to qualify that with the fact that I first flew in November
and haven't really had a warm day yet where I have shut down and restarted
while the engine was still hot. On a couple of flights I stopped for fuel and
got going again in 20-30" but it was less than 20degF outside so I am sure the
engine and compartmentt cooled fairly rapidly.
I have a temp sensor in the aft engine compt and I have never seen it above 150degF.
For 1st start of the day I turn the boost on with mixture full rich and give it
2-3seconds of prime (boost pump puts out almost 30psi) for later starts that
day I just bump the primer. Never see more than 3 blades before it fires.
Only start trouble I have had was 2 weeks ago it was 6 deg F outside. Using my
normal methods it would kick over but wouldn't stay running.
So I just started increasing my prime 1 second at a time.
Ended up flooding it and started a fire on the ground. Not really sure what technique
to use in really cold other than probably pre heat.
It really starts and acts pretty much like the pressure carb does as best I can
tell.
I did also recently experience the momentary stumble with rapid throttle advancement
that others have experienced with the carb. This had not occured in the
past. Talked to Don Rivera at AFP about this and it seems I needed to increase
pressure from the engine driven fuel pump.
I've made the adjustment but haven't flown yet.
--------
Milt
N395V
F1 Rocket
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93624#93624
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| Subject: | Re: Any hot start problems with fuel injection? |
Milt,
I would be very curious to see what your hottest aft engine compartment
temps run in the summertime. On the pitts 12, we normally run an aluminum
CO2 bottle for air, but awhile back I picked up one of those super light 3lb
firefighter backup bottles. Its a very thin aluminum bottle wrapped in
carbon/fiberglass rated to 2216 psi, but should be kept below 160 deg F. At
180 deg F the resin starts to transition, although at our pressures the
bottle won't burst since its operating at 38% rated pressure. Does anybody
have an idea what temp the air going INTO the bottle might be?
Also when have you seen 150 on your sensor, inflight or on the ground after
shutdown?
Thanks,
Darin Bishop
Pitts 12
www.2wings.com
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| Subject: | Re: Any hot start problems with fuel injection? |
Hey Guys, My guess you are confusing a port type injection system with the
type on Milt's aircraft. The port type on the big Lycoming are a pain to
start hot as we all know. The system Milt has is a throttle body type of
injection that is very similar to the pressure carb that is already standard
on the M14P. Furthermore, I expect there is a vapor return system on Milt's
instigation like all the Russian planes use.
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of N395V
Sent: Thursday, February 08, 2007 8:49 AM
Subject: M14PEngines-List: Re: Any hot start problems with fuel injection?
Not as yet but I have to qualify that with the fact that I first flew in
November and haven't really had a warm day yet where I have shut down and
restarted while the engine was still hot. On a couple of flights I stopped
for fuel and got going again in 20-30" but it was less than 20degF outside
so I am sure the engine and compartmentt cooled fairly rapidly.
I have a temp sensor in the aft engine compt and I have never seen it above
150degF.
For 1st start of the day I turn the boost on with mixture full rich and give
it 2-3seconds of prime (boost pump puts out almost 30psi) for later starts
that day I just bump the primer. Never see more than 3 blades before it
fires.
Only start trouble I have had was 2 weeks ago it was 6 deg F outside. Using
my normal methods it would kick over but wouldn't stay running.
So I just started increasing my prime 1 second at a time.
Ended up flooding it and started a fire on the ground. Not really sure what
technique to use in really cold other than probably pre heat.
It really starts and acts pretty much like the pressure carb does as best I
can tell.
I did also recently experience the momentary stumble with rapid throttle
advancement that others have experienced with the carb. This had not occured
in the past. Talked to Don Rivera at AFP about this and it seems I needed to
increase pressure from the engine driven fuel pump.
I've made the adjustment but haven't flown yet.
--------
Milt
N395V
F1 Rocket
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93624#93624
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| Subject: | Re: Any hot start problems with fuel injection? |
George is correct. I do not have multiport fuel injection. It is an AFP throttle
body that bolts directly to the carb anchor bolts. It functions similiar to
the pressure carb except for manual control of mixture.
While I plumbed for a fuel return line on the plane I did not utilize it. The fuel
runs to the Throttle body and primer are so short direct and uphill that i
did not think vapor would be an issue. So far this has turned out to be correct.
I think George (correct me if I am wrong) is developing a full blown multiport
FI system that should be just awesome.
--------
Milt
N395V
F1 Rocket
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93756#93756
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| Subject: | Re: Any hot start problems with fuel injection? |
> when have you seen 150 on your sensor, inflight or on the ground after
> shutdown?
>
>
Darin,
Highest temps have been on the ground shortly after shutdown but they decrease
rapidly. I have an electric start so the airbottle is not an issue for me.
--------
Milt
N395V
F1 Rocket
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93761#93761
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| Subject: | Re: Any hot start problems with fuel injection? |
ELECTRIC start!!!??? On a 52TW we call them "sissy Yak's". :-) So I guess
we'll have to start calling your Rocket a "sissy Rocket". :-) Only kidding
with you of course, Milt.
Dennis
----- Original Message -----
From: "N395V" <n395v@hughes.net>
Sent: Thursday, February 08, 2007 4:23 PM
Subject: M14PEngines-List: Re: Any hot start problems with fuel injection?
>
>
>> when have you seen 150 on your sensor, inflight or on the ground after
>> shutdown?
>>
>>
>
>
> Darin,
>
> Highest temps have been on the ground shortly after shutdown but they
> decrease rapidly. I have an electric start so the airbottle is not an
> issue for me.
>
> --------
> Milt
> N395V
> F1 Rocket
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=93761#93761
>
>
>
Message 8
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| Subject: | Re: Any hot start problems with fuel injection? |
[Laughing] [Laughing] [Laughing] [Laughing] [Laughing] [Laughing] [Laughing]
[Laughing] [Laughing] [Laughing] [Laughing] [Laughing] [Laughing]
donot archive
--------
Milt
N395V
F1 Rocket
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93802#93802
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