Today's Message Index:
----------------------
1. 09:11 AM - Re: Rocket fuel pressure (Bob & Toodie Marshall)
2. 11:08 AM - Re: Rocket fuel pressure (Jim Stone)
3. 11:24 AM - Re: Rocket fuel pressure (Fred Weaver)
4. 12:35 PM - Re: Rocket fuel pressure (Boyd Braem)
5. 09:08 PM - Re: Rocket fuel pressure (Winnick645@cs.com)
6. 09:24 PM - tit-tit anium gear legs/wheel fairings (Boyd Braem)
7. 10:09 PM - Re: HPAI - High Performance Experimental Aircraft (Boyd Braem)
8. 10:35 PM - Re: Speed for M-1 (Boyd Braem)
Message 1
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| Subject: | Re: Rocket fuel pressure |
--> Rocket-List message posted by: "Bob & Toodie Marshall" <rtmarshall@osb.net>
U2 Nelson, Same thing occurs in my rocket, some days the fuel pressure going
to the low side 18psi, after about forty hours of that this summer I have
concluded its pretty normal ? but after blowing the left gear leg fairing at
red line I am not sure anything is normal anymore, lots of funny vibration
from that little piece of fairing, it was super cold up here in the high
sierras and I wanted to fly on Orville's and Wilber's day and do a few rolls
for them, I decided to finish it off with a screaming high speed pass down
the runway, I was a little higher than normal for the start, so I pushed the
nose over from cruise, for whatever reason I glanced at the indicated A/S
and I was approaching red line, so power back and a slight pull on on the
stick and wham the fairing let go, gets you attention! One moment of
brainfade and you find yourself in a serious situation, like the last
discussion, these things really accelerate fast Have fun guys! Bob, N
#999RM !----- Original Message -----
From: "u2nelson" <u2nelson@prodigy.net>
matronics" <rocket-list@matronics.com>; "Mlfred@aol. com" <Mlfred@aol.com>
Subject: Rocket-List: Rocket fuel pressure
> --> Rocket-List message posted by: "u2nelson" <u2nelson@prodigy.net>
>
> I have a question for all you smart Rocket pilots/mechanics out there.
> First the back ground; I have Airflow performance fuel injection with
> Airflow electric pump. I'm normally seeing about 18-22 PSI with engine
> driven pump (old style with cam driven diaphragm, not the newer gear
driven
> one) and 22 PSI with engine pump and electric pump running together. I
also
> have two fuel filters, one on each tank.
>
> This was on a cold, humid day, right after take off, so I'm certain it was
> not vapor lock, but what I saw was the fuel pressure slowly fluctuate down
> to about 14 PSI, and then slowly back to the usual 18-22 PSI. Cycle time
> approximately 5 seconds to get to 14 PSI, then 5 more to return to 20. I
> switched tanks thinking I might have a blockage, but the slow fluctuation
> continued. I switched on the electric pump, and the pressure steadied up
at
> 22 PSI. Engine was purring like a kitten whole time. Satisfied I was not
> about to flame out, I flew with the electric pump off, for the next hour
at
> various power settings, watching the fuel pressure like a hawk and after
> about 1/2 hour this fluctuation cycle got further and further apart
> eventually stopping, stabilizing at the usual 18-22 PSI. The last half
hour
> was like the previous 140 hours, reasonably steady pressure of 18-22 PSI.
>
> Does anyone know what caused this, and should I be concerned? Is my
> mechanical engine pump starting to go, or could it have been water? dirt?
> air? or what?
>
> Thanks in advance for any insight.
>
> Greg Nelson
> N144X
>
>
Message 2
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| Subject: | Rocket fuel pressure |
--> Rocket-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Hey Bob,
Could you describe the procedure you used to attach your gear leg
fairings? I am about to start mine and my latest input is to let them
float over the leg and only attach at top and bottom fairings. Sound
reasonable?
Thanks,
Jim
-----Original Message-----
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Bob &
Toodie Marshall
Subject: Re: Rocket-List: Rocket fuel pressure
--> Rocket-List message posted by: "Bob & Toodie Marshall"
<rtmarshall@osb.net>
U2 Nelson, Same thing occurs in my rocket, some days the fuel pressure
going
to the low side 18psi, after about forty hours of that this summer I
have
concluded its pretty normal ? but after blowing the left gear leg
fairing at
red line I am not sure anything is normal anymore, lots of funny
vibration
from that little piece of fairing, it was super cold up here in the high
sierras and I wanted to fly on Orville's and Wilber's day and do a few
rolls
for them, I decided to finish it off with a screaming high speed pass
down
the runway, I was a little higher than normal for the start, so I pushed
the
nose over from cruise, for whatever reason I glanced at the indicated
A/S
and I was approaching red line, so power back and a slight pull on on
the
stick and wham the fairing let go, gets you attention! One moment of
brainfade and you find yourself in a serious situation, like the last
discussion, these things really accelerate fast Have fun guys! Bob, N
#999RM !----- Original Message -----
From: "u2nelson" <u2nelson@prodigy.net>
matronics" <rocket-list@matronics.com>; "Mlfred@aol. com"
<Mlfred@aol.com>
Subject: Rocket-List: Rocket fuel pressure
> --> Rocket-List message posted by: "u2nelson" <u2nelson@prodigy.net>
>
> I have a question for all you smart Rocket pilots/mechanics out there.
> First the back ground; I have Airflow performance fuel injection with
> Airflow electric pump. I'm normally seeing about 18-22 PSI with
engine
> driven pump (old style with cam driven diaphragm, not the newer gear
driven
> one) and 22 PSI with engine pump and electric pump running together.
I
also
> have two fuel filters, one on each tank.
>
> This was on a cold, humid day, right after take off, so I'm certain it
was
> not vapor lock, but what I saw was the fuel pressure slowly fluctuate
down
> to about 14 PSI, and then slowly back to the usual 18-22 PSI. Cycle
time
> approximately 5 seconds to get to 14 PSI, then 5 more to return to 20.
I
> switched tanks thinking I might have a blockage, but the slow
fluctuation
> continued. I switched on the electric pump, and the pressure steadied
up
at
> 22 PSI. Engine was purring like a kitten whole time. Satisfied I was
not
> about to flame out, I flew with the electric pump off, for the next
hour
at
> various power settings, watching the fuel pressure like a hawk and
after
> about 1/2 hour this fluctuation cycle got further and further apart
> eventually stopping, stabilizing at the usual 18-22 PSI. The last
half
hour
> was like the previous 140 hours, reasonably steady pressure of 18-22
PSI.
>
> Does anyone know what caused this, and should I be concerned? Is my
> mechanical engine pump starting to go, or could it have been water?
dirt?
> air? or what?
>
> Thanks in advance for any insight.
>
> Greg Nelson
> N144X
>
>
==
==
==
==
Message 3
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| Subject: | Re: Rocket fuel pressure |
--> Rocket-List message posted by: Fred Weaver <mytyweav@earthlink.net>
I'd be interested in this installation also... BTW, Jim, I've been
advised by other Rocketeers to only attach the fairing at the top and
let the lower portion slide within the intersection fairing. They are
so long and the gear moves so far that if you attach it at both ends,
something has to give........Looking for inputs that work..
Fred
On Monday, December 22, 2003, at 11:08 AM, Jim Stone wrote:
> --> Rocket-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Hey Bob,
> Could you describe the procedure you used to attach your gear leg
> fairings? I am about to start mine and my latest input is to let them
> float over the leg and only attach at top and bottom fairings. Sound
> reasonable?
> Thanks,
> Jim
>
> -----Original Message-----
> From: owner-rocket-list-server@matronics.com
> [mailto:owner-rocket-list-server@matronics.com] On Behalf Of Bob &
> Toodie Marshall
> To: rocket-list@matronics.com
> Subject: Re: Rocket-List: Rocket fuel pressure
>
> --> Rocket-List message posted by: "Bob & Toodie Marshall"
> <rtmarshall@osb.net>
>
> U2 Nelson, Same thing occurs in my rocket, some days the fuel pressure
> going
> to the low side 18psi, after about forty hours of that this summer I
> have
> concluded its pretty normal ? but after blowing the left gear leg
> fairing at
> red line I am not sure anything is normal anymore, lots of funny
> vibration
> from that little piece of fairing, it was super cold up here in the
> high
> sierras and I wanted to fly on Orville's and Wilber's day and do a few
> rolls
> for them, I decided to finish it off with a screaming high speed pass
> down
> the runway, I was a little higher than normal for the start, so I
> pushed
> the
> nose over from cruise, for whatever reason I glanced at the indicated
> A/S
> and I was approaching red line, so power back and a slight pull on on
> the
> stick and wham the fairing let go, gets you attention! One moment of
> brainfade and you find yourself in a serious situation, like the last
> discussion, these things really accelerate fast Have fun guys! Bob, N
> #999RM !----- Original Message -----
> From: "u2nelson" <u2nelson@prodigy.net>
> To: "F1builders list" <f1builders@lists.cc.utexas.edu>; "Rocket-List
> matronics" <rocket-list@matronics.com>; "Mlfred@aol. com"
> <Mlfred@aol.com>
> Subject: Rocket-List: Rocket fuel pressure
Message 4
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| Subject: | Re: Rocket fuel pressure |
--> Rocket-List message posted by: Boyd Braem <bcbraem@comcast.net>
Greg--
This "fuel pressure drop" has happened to me twice when on an extended,
fast climb to (10,000-11,000 ft). Pressure dropped to around 7--I only
noticed it on my "scan"--engine was doing great. I switched on the AFP
fuel pump until I leveled off and everything was fine. I have a theory
or two about the problem, but I would never post anything on the List
without knowing that I was 100% correct. Merry Christmas.
do not archive
On Sunday, December 21, 2003, at 08:11 PM, u2nelson wrote:
> --> Rocket-List message posted by: "u2nelson" <u2nelson@prodigy.net>
>
> I have a question for all you smart Rocket pilots/mechanics out there.
> First the back ground; I have Airflow performance fuel injection with
> Airflow electric pump. I'm normally seeing about 18-22 PSI with engine
> driven pump (old style with cam driven diaphragm, not the newer gear
> driven
> one) and 22 PSI with engine pump and electric pump running together.
> I also
> have two fuel filters, one on each tank.
>
> This was on a cold, humid day, right after take off, so I'm certain it
> was
> not vapor lock, but what I saw was the fuel pressure slowly fluctuate
> down
> to about 14 PSI, and then slowly back to the usual 18-22 PSI. Cycle
> time
> approximately 5 seconds to get to 14 PSI, then 5 more to return to 20.
> I
> switched tanks thinking I might have a blockage, but the slow
> fluctuation
> continued. I switched on the electric pump, and the pressure steadied
> up at
> 22 PSI. Engine was purring like a kitten whole time. Satisfied I was
> not
> about to flame out, I flew with the electric pump off, for the next
> hour at
> various power settings, watching the fuel pressure like a hawk and
> after
> about 1/2 hour this fluctuation cycle got further and further apart
> eventually stopping, stabilizing at the usual 18-22 PSI. The last
> half hour
> was like the previous 140 hours, reasonably steady pressure of 18-22
> PSI.
>
> Does anyone know what caused this, and should I be concerned? Is my
> mechanical engine pump starting to go, or could it have been water?
> dirt?
> air? or what?
>
> Thanks in advance for any insight.
>
> Greg Nelson
> N144X
Message 5
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| Subject: | Re: Rocket fuel pressure |
--> Rocket-List message posted by: Winnick645@cs.com
Greg,
Do you have a VM 1000? I regularly see this on my F1. I called vision
microsystems and they indicated that the fuel pressure off the engine driven pump
fluctuates in a sine wave type pattern and the VM 1000 is sensitive enough that
it will monitor the highs and lows of the wave pattern. I was a little
skeptical so I installed another engine driven pump... no change. The engine has
never missed a beat.
F1 #2 Rich Winnick
Message 6
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| Subject: | tit-tit anium gear legs/wheel fairings |
--> Rocket-List message posted by: Boyd Braem <bcbraem@comcast.net>
I've got the long titanium gear legs and when I lift the engine (to
show off to the girls at the beach), the wheels move inward (laterally)
about 4-5 inches--you may also notice a slight "sag" in the gear legs
when bearing full weight (this is normal). This is life in the fast
lane. Weight on/ weight off, not only changes the the lateral wheel
position but, also its vertical angle and, maybe, toe-in, toe-out. So
"flexible" wheel pant intersection fairings are a good idea--there are
several ways to do this. But, don't bother with axle shims--I've
worked that one to death, to no avail.
May we all fly with Santa.
Boyd.
On Monday, December 22, 2003, at 02:27 PM, Fred Weaver wrote:
> --> Rocket-List message posted by: Fred Weaver <mytyweav@earthlink.net>
>
> I'd be interested in this installation also... BTW, Jim, I've been
> advised by other Rocketeers to only attach the fairing at the top and
> let the lower portion slide within the intersection fairing. They are
> so long and the gear moves so far that if you attach it at both ends,
> something has to give........Looking for inputs that work..
> Fred
>
> On Monday, December 22, 2003, at 11:08 AM, Jim Stone wrote:
>
>> --> Rocket-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>
>> Hey Bob,
>> Could you describe the procedure you used to attach your gear leg
>> fairings? I am about to start mine and my latest input is to let them
>> float over the leg and only attach at top and bottom fairings. Sound
>> reasonable?
>> Thanks,
>> Jim
Message 7
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| Subject: | Re: HPAI - High Performance Experimental Aircraft |
--> Rocket-List message posted by: Boyd Braem <bcbraem@comcast.net>
The M-1, some how, looks very very much like the F-2 that Mark (Team
Rocket) was trying to market (except for the 3rd wheel location).
On Sunday, December 21, 2003, at 10:29 PM, Larry Westbrook wrote:
> --> Rocket-List message posted by: "Larry Westbrook"
> <larmec@sowega.net>
>
> This is the M-1 I'm thinking about building. Training wheel in front.
> Larry
>
> http://www.international-hpa.com/products.html
Message 8
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| Subject: | Re: Speed for M-1 |
--> Rocket-List message posted by: Boyd Braem <bcbraem@comcast.net>
Larry--
This airplane has a "common" airframe. Your biggest problem will
probably be what to put in the instrument panel. Mark F. has been
working on getting this design out for several years.
On a personal note, you really don't really want a carb and a
fixed-pitch (trust me on this)--you'll be missing so much of what this
'plane can do--and when the world has you down, etc., etc.--this plane
will restore your spirits, get you beautiful dates, make the other
pilots at the airport hate you and increase your post-flight beer
drinking.
Also, give a thought to the IO-540 C4B5 engine being ported and
flow-balanced--and, maybe even 10:1 pistons. These little planes can
"almost" fly like jets (sort of an exaggeration).
Boyd
RV-Super 6
On Sunday, December 21, 2003, at 07:20 PM, Larry Westbrook wrote:
> --> Rocket-List message posted by: "Larry Westbrook"
> <larmec@sowega.net>
>
> Hi Rocketters,
> I build a RV-9A from a slow-build kit, took 2 years and have now
> flown it 335 hrs. in 2 years. My question is about
> the M-1 speedcruiser that Mark thinks he will be selling the
> quick-build kit for in July 2004. Do you think it would be wise
> to buy one of the first kits or should I wait a little while they work
> out the bugs. I would like to keep it simple and use a stock O-540
> with fixed pitch prop. Are there any rockets with that combo? What can
> I really expect for climb and top speed wide open?
> Thanks,
> Larry N15LW
>
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