Today's Message Index:
----------------------
1. 10:02 AM - Re: 7RW flies again (n5pb@aol.com)
2. 11:54 AM - Re: 7RW flies again (N1BZRich@AOL.COM)
3. 12:16 PM - Re: 7RW flies again (Bill Strahan)
4. 01:24 PM - Re: Re: 7RW flies again (N1BZRich@AOL.COM)
5. 01:35 PM - Re: Re: 7RW flies again (N1BZRich@AOL.COM)
6. 05:31 PM - Re: 7RW flies again (Bill Strahan)
7. 06:42 PM - Re: Re: 7RW flies again (N1BZRich@AOL.COM)
Message 1
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| Subject: | Re: 7RW flies again |
Bill, glad you're back in the air again!
It was nice to see you at SNF and also to check out the IFLY GPS 700...i'm
having alot of fun wiht it. For now, It's really being used as a flight
planning tool the night prior to the flight and a back up system in the
cockpit (Since I have internal GPS) in case I have an electrical falure.
It sure is a pleasure to use though.
I too am working on getting all the little "distractors" resolved in my je
t. The gear shimmy is one I'm working on now. I downloaded all the previ
ous discussions in the newsletters (thanks bo Buz and the gang for publish
ing, editing and indexing).It was easy to pull specific info on it again.
You may be right on the balancing, however, that's going to be my starting
point. Then it's air pressure, wheel pants on/off...and anything else as
I travel on down the runway....
Bear
-----Original Message-----
From: Bill Strahan <bill@gdsx.com>
Sent: Sun, May 9, 2010 2:24 am
Subject: Lightning-List: 7RW flies again
I got tired of experimenting with the Rotec. It seems like it's a very ni
ce
iece of hardware, but I had spent so many hours trying to get it working
better
han the Bing that I found myself missing that other thing I used to do wit
h my
pare time...it's called FLYING!
So while part of me feels the Rotec has potential to be a better solution
than
he Bing I don't think I'll be the person to tap that potential. Last week
I
emoved the Rotec and began the tedious process of removing all the control
s and
estoring as close as possible the original configuration of the intake sys
tem.
was suprised when the engine fired right up and idled as smooth as could
be.
n hour of running, checking for any loose fittings, double checking to mak
e
ure nothing was rubbing anywhere in the engine compartment or under the pa
nel
nd I put the cowling back on and went flying.
It felt wonderful. I still hate seeing the wide spread between EGTs when
unning full throttle but I can throttle back to about 145-150 mph and get
them
ice and even and then lean further with the Hacman.
So at this point I'm tired of jacking with the engine. Any improvements
in
erformance will be from aerodynamic changes. Flap bracket fairings are hi
gh on
he list, and at some point I'll start playing with the cowling.
But I also need to address the landing gear shimmy when slowing down after
anding first. I've seen discussion of balancing the tires, but the ride
is so
mooth at speed that I find that unlikely. There's only one speed, probabl
y
etween 20 and 30 mph, which causes the shimmy.
I've seen discussion on this topic, but nothing definitive. Go the RV rou
te and
tiffen the gear fore/aft? Thoughts?
Glad to be back in the air,
Bill
ead this topic online here:
http://forums.matronics.com/viewtopic.php?p=297162#297162
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Message 2
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| Subject: | Re: 7RW flies again |
Bill,
We appreciate your experimenting and passing the results on to the
list. Sorry the Rotec didn't work out, but maybe you can try a fuel injection
system next. Helmut in Australia is working on an electronic fuel
injection for the Jabiru 3300 and has promised to share his results with us at
some point in the future. Until them, have fun with your jet.
By the way, good seeing you at SNF. Every time I came by your booth,
you both seemed to have lots of people crowded around asking questions.
Hope you sold lots of iFly 700s.
Buz
In a message dated 5/9/2010 2:25:37 A.M. Eastern Daylight Time,
bill@gdsx.com writes:
--> Lightning-List message posted by: "Bill Strahan" _bill@gdsx.com_
(mailto:bill@gdsx.com)
I got tired of experimenting with the Rotec. It seems like it's a very
nice piece of hardware, but I had spent so many hours trying to get it
working better than the Bing that I found myself missing that other thing I used
to do with my spare time...it's called FLYING!
So while part of me feels the Rotec has potential to be a better solution
than the Bing I don't think I'll be the person to tap that potential. Last
week I removed the Rotec and began the tedious process of removing all the
controls and restoring as close as possible the original configuration of
the intake system.
I was suprised when the engine fired right up and idled as smooth as could
be. An hour of running, checking for any loose fittings, double checking
to make sure nothing was rubbing anywhere in the engine compartment or
under the panel and I put the cowling back on and went flying.
It felt wonderful. I still hate seeing the wide spread between EGTs when
running full throttle but I can throttle back to about 145-150 mph and get
them nice and even and then lean further with the Hacman.
So at this point I'm tired of jacking with the engine. Any improvements
in performance will be from aerodynamic changes. Flap bracket fairings are
high on the list, and at some point I'll start playing with the cowling.
But I also need to address the landing gear shimmy when slowing down after
landing first. I've seen discussion of balancing the tires, but the ride
is so smooth at speed that I find that unlikely. There's only one speed,
probably between 20 and 30 mph, which causes the shimmy.
I've seen discussion on this topic, but nothing definitive. Go the RV
route and stiffen the gear fore/aft? Thoughts?
Glad to be back in the air,
Bill
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=297162#297162
Message 3
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| Subject: | Re: 7RW flies again |
It was great putting faces with names while at Sun & Fun! It was fun to be at
the show but I really missed getting out and just enjoying the event. We had
a phenomenal response to the GPS.
I've read about a couple of fuel injected Jabirus with great interest. I absolutely
LOVE how smooth the engine is, and in fact like everything about it except
the poor fuel distribution at full throttle. Part of it has to be how close
the carb is to the split to the individual cylinders. Fuel injection would
solve that problem.
Having taken 7RW up to 17,500 now I'm convinced the true potential of the airframe
for cross country travel can't be realized without the ability to run full
throttle with even distribution of fuel. It's not as critical down low where
75% power is attained at much less than full throttle. Above about 8,000' full
throttle is needed, and above about 13,000 the engine runs rough at full throttle.
At 15,000' with the throttle pulled back to the point that the EGTs are fairly
even I'm in "Prius Lightning" mode where I get phenomenal efficiency but only
going about 135 mph.
Bill
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=297190#297190
Message 4
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| Subject: | Re: 7RW flies again |
In a message dated 5/9/2010 3:16:37 P.M. Eastern Daylight Time,
bill@gdsx.com writes:
Having taken 7RW up to 17,500 now I'm convinced the true potential of the
airframe for cross country travel can't be realized without the ability to
run full throttle with even distribution of fuel. It's not as critical
down low where 75% power is attained at much less than full throttle. Above
about 8,000' full throttle is needed, and above about 13,000 the engine runs
rough at full throttle.
Message 5
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| Subject: | Re: 7RW flies again |
In a message dated 5/9/2010 3:16:37 P.M. Eastern Daylight Time,
bill@gdsx.com writes:
Having taken 7RW up to 17,500 now I'm convinced the true potential of the
airframe for cross country travel can't be realized without the ability to
run full throttle with even distribution of fuel. It's not as critical
down low where 75% power is attained at much less than full throttle. Above
about 8,000' full throttle is needed, and above about 13,000 the engine runs
rough at full throttle.
Bill,
It has been a while since my phase one testing (some 650 hours ago)
but I had 31BZ up to 16,000 and had no problem with the engine running smooth
at that altitude. I still had a 200 foot per minute rate of climb up
there, so just decided my max altitude would be 18000. My feet were too cold
to
try to go higher.
I have not been that high since, but often cruise as high as 14,500 on
a long cross country (yes, I have Oxygen) and again, no problem with the
engine not running smooth at those altitudes. However, it is obvious that
the Bing is not leaning enough at those altitudes. I have also had the
prototype to 14,000 on several occasions, again with no rough running engine.
So there might be something else going on with your engine other than the
Bing carb to cause the rough running above 13000. At those altitudes I
normally see true airspeed cruise speeds between 165 and 170 mph and fuel
burns average out to about 5.8 gph.
Buz
Message 6
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| Subject: | Re: 7RW flies again |
Hmmm. The rough running only occurs at full throtle at those altitudes. And I
haven't had it that high since I got all reinstalled. I've done over 180 straight
and level at 14,500 but that was burning much more than you were. By the
time I throttle back enough to get nice even EGTs I'm going a lot slower, but
fuel burn is less than 4 gph.
Do you have the long or short wingtips on your plane?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=297209#297209
Message 7
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| Subject: | Re: 7RW flies again |
In a message dated 5/9/2010 8:31:54 P.M. Eastern Daylight Time,
bill@gdsx.com writes:
Do you have the long or short wingtips on your plane?
I have the medium tips. Sorry, couldn't resist that. Remember I don't
have a Lightning - it is a highly modified Esqual (Lightning cowling, etc.).
The wings are about halfway between the short and the long Lightning.
Buz
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