Today's Message Index:
----------------------
1. 03:22 AM - Re: Wing Center Section (icrashrc)
2. 08:03 AM - Re: Re: Fjuel rtanks (Vic)
3. 09:24 AM - Re: Static rpm - warp drive/912ULS (lucien)
4. 10:00 AM - Re: Fuel tanks (olendorf)
5. 01:33 PM - New Engine Concept (David Key)
6. 01:41 PM - Re: Static rpm - warp drive/912ULS (JetPilot)
7. 01:45 PM - Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? (JetPilot)
8. 01:55 PM - Re: 'Vertical' CG (JetPilot)
9. 02:11 PM - Re: Static rpm - warp drive/912ULS (lucien)
10. 02:54 PM - Re: New Engine Concept (Dana Hague)
11. 03:04 PM - Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? (faisalasif)
12. 04:33 PM - Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? (JetPilot)
13. 04:41 PM - Re: oldest in-flight video? (JetPilot)
14. 04:44 PM - Re: Static rpm - warp drive/912ULS (JetPilot)
15. 06:16 PM - Re: Static rpm - warp drive/912ULS (lucien)
Message 1
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| Subject: | Re: Wing Center Section |
Dennis,
Thanks for the pat on the back. It was a lot of work but worth it.
Unfortunately [for you] we're building a M3X and our center section wouldn't fit
the Mark 3 Classic either. The windshield and fuselage are shaped differently.
Sorry,
--------
Scott
www.ill-EagleAviation.com
do not archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234418#234418
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| Subject: | Re: Fjuel rtanks |
Rick
The tank I found was West Marine, Moeller bow tank. Sender,fill 1
1/2",return and vent $209.
To good to be true. You bet I just went out and removed a side cover on
the Xtra. It wont fit.
O so close. Not baffled.
Thanks for every ones input.
to whomever was asking, I used a bag BRS much shorter, left room in
front of the 912 for the oil tank. You can make a lexan cover to protect
it and fasten it to your gap seal. (rivets and velcro?)
Vic
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| Subject: | Re: Static rpm - warp drive/912ULS |
JetPilot wrote:
> I set my prop based on John Haucks advice, which makes perfect sense, to adjust
the pitch so that the engine is running at 5500 RPM wide open throttle, at
max level flight speed. My RPM's are just a hair slower than Johns, I see around
5200 RPM on climbout, and about the same static.
>
FWIW, I got to do some high speed taxi tests last night - it was too windy and
dark to actually take the plane up.
but my jaw dropped when I saw how far the RPM's went down as soon as airflow started
going through the prop disk. At 5300 or so static, by the time the ASI started
indicating, it'd loaded down to nearly 4900 rpm.... good thing I didn't
actually try to blast off.
Took 2 degrees of pitch out and tried again. Now it loads down to about 5290 or
thereabouts on the roll, so that's probably reasonably close to where it should
be.
If I can ever get daylight and reasonable winds to coincide, I have it set well
enough to fly at this point I think.
I should add that once the blades start to "catch", the thrust is significantly
more than I got with the IVO. So it'll be interesting to see what I get once
I get airborne....
LS
--------
LS
Titan II SS
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Here is the company that made my 8 gal tank. The tank is working great. No leaks. http://www.alumiworx.com/cart/index.php?act=viewProd&productId
--------
Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
http://KolbFirestar.googlepages.com
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http://forums.matronics.com/viewtopic.php?p=234442#234442
Attachments:
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| Subject: | New Engine Concept |
http://engineeringtv.com/blogs/etv/archive/2008/07/01/opposed-piston-oppose
d-cylinder-engine.aspx
Message 6
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| Subject: | Re: Static rpm - warp drive/912ULS |
That seems like a good place to start Lucien. That RPM is pretty typical for many
different aircraft climbing out on the 912-S with a fixed pitch prop. Once
you get in level flight, open the throttle wide open level flight it gets going
as fast as its going to go, and that should be 5500 RPM.
Since your Titan is fast, your RPM will increase with speed more than ours do on
the Kolbs. My guess is that you might have to pitch the prop a bit more ???
But I would fly it the way it is now and see what you get, the RPM you have
now sounds great for a flight test. I have experimented with different pitches
quite a bit on my 912-S / warpdrive setup. If you dont get it right, the cruise
performance can be very bad, but you would have to be way way off for the
plane not to fly well and scare yourself [Wink] I have heard of some airplanes
being around 5100 RPM or even a bit less on climbout. Hope you get a good
flying day soon, I am anxious to hear your report on how the Warp compares
to the IVO.
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
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http://forums.matronics.com/viewtopic.php?p=234477#234477
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| Subject: | Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? |
I have the VLS on my Kolb MK III Xtra, and although I have not tried it yet, it
seems very good good for the airplane [Wink] The fit of the VLS pack is
PERFECT for the top of the MK III Xtra, I like it much better than the canister
! I will post some pictures of it in a little while so that you can see for
yourself.
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234481#234481
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| Subject: | Re: 'Vertical' CG |
[quote="rlaird"]
Yeah, sort of like a home made Kolb MkIII, built and tested by people with limited
resources and funds !... Oooo, that's scary! ;-)
-- R
> [b]
Yes, its true of our Kolbs also,
But I feel much better with big aluminum tube spars, ribs and fabric, Even I can
get this right ! Hanging by a whirling mass of very highly stressed rotor
components, bearings, and linkages just seems more problematic than the big aluminum
tube spar we hang by. I am just as happy to leave the rotors to Bell
Helicopter ;)
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234484#234484
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| Subject: | Re: Static rpm - warp drive/912ULS |
JetPilot wrote:
> That seems like a good place to start Lucien. That RPM is pretty typical for
many different aircraft climbing out on the 912-S with a fixed pitch prop. Once
you get in level flight, open the throttle wide open level flight it gets
going as fast as its going to go, and that should be 5500 RPM.
>
> Since your Titan is fast, your RPM will increase with speed more than ours do
on the Kolbs. My guess is that you might have to pitch the prop a bit more ???
But I would fly it the way it is now and see what you get, the RPM you have
now sounds great for a flight test. I have experimented with different pitches
quite a bit on my 912-S / warpdrive setup. If you dont get it right, the
cruise performance can be very bad, but you would have to be way way off for
the plane not to fly well and scare yourself [Wink] I have heard of some airplanes
being around 5100 RPM or even a bit less on climbout. Hope you get a
good flying day soon, I am anxious to hear your report on how the Warp compares
to the IVO.
>
> Mike
Well tomorrow we might get a break in the winds, so perhaps I can go around the
patch with it.
Part of the complication is my altitude (7000'MSL), which turns the motor into
about a strong sea-level 582 rather than a 912uls. A regular kick around the patch
sightseeing has me close to 10,000' and the houses and mountains are sometimes
still too big. So even with the IVO when I had it flatted out to 5400 in
level flight it could barely do 100mph indicated (tho about 110 true). So the
speed range isn't too terribly much more than even a Mark III. But I did go with
a 68" to start with, so it would run more pitch and hopefully have more cushion
for speed range.
I'm less concerned about cruise than I am climb, but I don't want the engine to
be able to overspeed in level flight (i.e. if the throttle cable breaks). So
I'll just have to work on it until it's right.
I'm blazing a little bit of a trail since a 68" diameter warp drive hasn't been
tried on a titan yet to my knowledge (only the SS has room for more than a 64").
The thrust when the blades unstall on the ground runs I did last night is significantly
more than the IVO, which starts off strong but then fades as you gather
speed. So hopefully it'll be more efficient in the air also.
LS
--------
LS
Titan II SS
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| Subject: | Re: New Engine Concept |
At 04:27 PM 3/13/2009, David Key wrote:
><http://engineeringtv.com/blogs/etv/archive/2008/07/01/opposed-piston-opposed-cylinder-engine.aspx>http://engineeringtv.com/blogs/etv/archive/2008/07/01/opposed-piston-opposed-cylinder-engine.aspx
I'm not holding my breath...
Whenever somebody publicizes a "new" engine concept (which in this case is
_not_ new) before constructing a working prototype, a working prototype
somehow never gets built.
-Dana
--
The strongest reason for the people to retain the right to keep and bear
arms is, as a last resort, to protect themselves against tyranny in
government. - Thomas Jefferson
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| Subject: | Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? |
Thanks Mike, I look forward to the pictures.
and thank you for taking time to respond.
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http://forums.matronics.com/viewtopic.php?p=234494#234494
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| Subject: | Re: BRS CANISTER or VLS ?? Which one would suit Mark III Xtra?? |
Here are three pictures showing the BRS, the VLS pack just sits in the top of the
MK III like it was built for it !
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234503#234503
Attachments:
http://forums.matronics.com//files/ultralightmikekolbdetail12_20_2006_068_175.jpg
http://forums.matronics.com//files/ultralightmikefloridaevergladescity06_15_2008_24_200.jpg
http://forums.matronics.com//files/ultralightkolbdetailvg02_18_2008_06_436.jpg
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| Subject: | Re: oldest in-flight video? |
That was cool, I have never seen a video from that period that was shot from inside
the plane. Good find .
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234504#234504
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| Subject: | Re: Static rpm - warp drive/912ULS |
The bigger diameter should be much more efficient at that your speed than a 64
inch prop. I have a 70 inch on my prop.
How much clearance do you have left to the tail boom tube with the larger prop
?
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234505#234505
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| Subject: | Re: Static rpm - warp drive/912ULS |
JetPilot wrote:
> The bigger diameter should be much more efficient at that your speed than a 64
inch prop. I have a 70 inch on my prop.
>
> How much clearance do you have left to the tail boom tube with the larger prop
?
>
> Mike
There's still a good 4 or 5". I measured it a while back and found that a 72" could
fit and there'd still be like 2 inches of clearance. I don't know what the
limits of flex are on the mounts and the rest of the plane tho so I'd say 70
is the max safe diameter.
I was thinking about going with a 70" but opted for 68" to allow a little more
pitch for the wider speed range.
I'll have to fly it and see how it does.
I actually had this exact same prop on my FS II (tho it was right hand instead)
and it worked great. It was my first warp drive prop and it was about as perfect
as you can get for the 3.47 C box and that plane.
Still miss it which is why one day I'd like to do a firefly/447....
LS
--------
LS
Titan II SS
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