Today's Message Index:
----------------------
1. 05:18 AM - Re: Anyone have experence with Hirth F-30? (Jim Kmet)
2. 05:33 AM - Re: Anyone have experence with Hirth F-30? (Thom Riddle)
3. 06:50 AM - Fw: Anyone have experence with Hirth F-30? (Jim Kmet)
4. 10:47 AM - Re: prop comparisons (lucien)
5. 11:12 AM - Re: prop comparisons (JetPilot)
6. 12:34 PM - Re: prop comparisons (lucien)
7. 06:29 PM - Owyhee Canyon Pictures (Larry Cottrell)
8. 06:53 PM - Re: Owyhee Canyon Pictures (John Hauck)
9. 08:14 PM - Re: Look! It's Chitty-Chitty-Bang-Bang for sale! (cristalclear13)
10. 08:22 PM - Re: Re: Look! It's Chitty-Chitty-Bang-Bang for sale! (John Hauck)
11. 08:43 PM - Re: Anyone have experence with Hirth F-30? (possums)
12. 08:56 PM - Re: Anyone have experence with Hirth F-30? (John Hauck)
13. 09:27 PM - Re: Owyhee Canyon Pictures (Richard & Martha Neilsen)
14. 09:32 PM - Off list - Hirth reputation. (possums)
15. 10:13 PM - Vapor Pressure and E-10 mogas (TheWanderingWench)
16. 10:24 PM - Re: Owyhee Canyon Pictures (Larry Cottrell)
Message 1
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| Subject: | Re: Anyone have experence with Hirth F-30? |
Bradley Stump has a Hirth of some sort on his newly finished MK3X, he
was flying it at TNK homecoming last Sept. I don`t have his contact
info, but I`m sure Travis or Donnie would .
Jim
----- Original Message -----
From: Nick Cassara
To: kolb-list@matronics.com
Sent: Wednesday, March 18, 2009 11:56 PM
Subject: Kolb-List: Anyone have experence with Hirth F-30?
Hello Folks,
Does anyone have experience with a Hirth F-30 2 cycle; it is now
available with "85hp fuel injected, dual ignition, with high torque
version, fan cooled, G-40 gear box". It sounds like some of the small
Hirth are not well liked, but there is a bit of a cat fight out there on
the web between Rotax and Hirth owners!
I am all ears!
Thanks your thoughts,
Nick Cassara
Proto-type Kolbra
unpowered
Message 2
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| Subject: | Re: Anyone have experence with Hirth F-30? |
Nick,
There is a nearly new CGS Hawk at our airport that has a Hirth in that power range.
I've not seen the owner/builder recently but will keep an eye out for him
when I'm there and try to get an email contact for you. The one time I talked
to him about the engine he had nothing but great things to say about it. Of
course since it is nearly new, that says nothing about its reliability etc. BUT
he did say that its fuel economy was outstanding for a 2-stroke in that power
range compared to the Rotax. All hearsay so this may not have much value.
--------
Thom Riddle
Buffalo, NY
http://riddletr.googlepages.com/sportpilot-cfi
http://riddletr.googlepages.com/a%26pmechanix
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
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| Subject: | Anyone have experence with Hirth F-30? |
I stand corrected. Donnie has retired from TNK, Travis or Dennis may
have brad Stumps contact info. Jim
----- Original Message -----
From: Jim Kmet
Sent: Thursday, March 19, 2009 7:17 AM
Subject: Re: Kolb-List: Anyone have experence with Hirth F-30?
Bradley Stump has a Hirth of some sort on his newly finished MK3X, he
was flying it at TNK homecoming last Sept. I don`t have his contact
info, but I`m sure Travis or Donnie would .
Jim
----- Original Message -----
From: Nick Cassara
To: kolb-list@matronics.com
Sent: Wednesday, March 18, 2009 11:56 PM
Subject: Kolb-List: Anyone have experence with Hirth F-30?
Hello Folks,
Does anyone have experience with a Hirth F-30 2 cycle; it is now
available with "85hp fuel injected, dual ignition, with high torque
version, fan cooled, G-40 gear box". It sounds like some of the small
Hirth are not well liked, but there is a bit of a cat fight out there on
the web between Rotax and Hirth owners!
I am all ears!
Thanks your thoughts,
Nick Cassara
Proto-type Kolbra
unpowered
Message 4
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| Subject: | Re: prop comparisons |
JetPilot wrote:
> That is very good information, makes me very glad I got a Warp Drive prop !
Since the performance is so close, the warp has the advantage of being far stronger
than all the others.
>
> Mike
Interesting that he complained about how heavy the warp drive was. I suppose compared
to the others its MOI is higher, especially with the square blades.
My taper tip seems to be light as a feather compared to the IVO medium. perhaps
the removal of the material at the end of the blades reduces the MOI even more.
Still settling in the adustments on mine. I must say, with all those bolts, I do
kind of miss the easy pitch adjust of the IVO (tho that's the only thing I miss
about it).
LS
--------
LS
Titan II SS
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| Subject: | Re: prop comparisons |
The Warp Drive prop takes longer to adjust the pitch on, but once you get it right
you probably wont have to do it again for years. I have not touched mine
since I put it on the plane and got it dialed in. I like the strength, the simplicity,
and the ability to adjust each blade to perfection on the Warp Drive
prop. Like a lot of things, what you get out of it depends on the effort you
put in.
Any updates on your testing Lucien ? Have you done any flying out of the pattern
with it yet ?
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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| Subject: | Re: prop comparisons |
JetPilot wrote:
> The Warp Drive prop takes longer to adjust the pitch on, but once you get it
right you probably wont have to do it again for years. I have not touched mine
since I put it on the plane and got it dialed in. I like the strength, the
simplicity, and the ability to adjust each blade to perfection on the Warp Drive
prop. Like a lot of things, what you get out of it depends on the effort you
put in.
>
> Any updates on your testing Lucien ? Have you done any flying out of the pattern
with it yet ?
>
> Mike
No, still havn't left the pattern ;). The windows where there's flyable winds and
I have time are tiny little slivers in the late afternoon here and there. And
when I do get to go up I like to concentrate on landings to keep the rust off....
I went up again yesteday and recorded between 5350 and 5450 on climbout (that's
varying between Vy of 65mph and about 80mph). But I did try straight-level on
downwind by flying a larger pattern. At 5100 or so I only get a little over 90mph
indicated and it's easy to tell it'd definitely overspeed if I tried WOT.
Seems like that's a little underpropped so just went out over my lunch break and
added 1/2 degree of pitch.
So I'm pretty close to a good pitch setting, hopefully I'll find the sweet spot
soon.
The climb rate is pretty spectacular at Vy with it the way it was, tho. between
900 and 1000fpm sustained at a density altitude of around 8500' MSL.... I'll
have to give a little of that back with the additional pitch but it's still good
climb for where I'm at.
LS
--------
LS
Titan II SS
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| Subject: | Owyhee Canyon Pictures |
http://www.facebook.com/album.php?aid 12888&id=1002056194&l=358dc
9273a
The weather was good today even though the lighting was a bit flat, so I
flew again in my attempt to break in my HKS before I have to try to keep
up with a bunch of Mark III's this May after MV.
To keep from getting bored with the scenery I went to the Canyon, which
always holds fascination for me. I flew for 1hour and 18 minutes
traveling 79 miles. I flew the first 45 minutes at 5000 RPM's on one
tank and then switched to the rear tank and flew at 5400 RPM"S. The
weird thing about it is that there is no noticeable difference in fuel
burn. Temps are still high and I had to fly with the choke on to keep
the temps under control on my way back. I have 18 hours on the engine
now. At 5000 RPMs the temps were 316 tops. The only trouble with that is
that I don't like to fly that slow. :-)
Larry
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| Subject: | Re: Owyhee Canyon Pictures |
Folks,
The photos don't compare with flying the Owyhee.
First time I flew it I had Arty Trost on board. I think John W had dropped
down in the canyon ahead of me. We were up on the lip. I asked Arty if s
he was game for flying the canyon. Her reply was go for it. We dropped in
and she grinned and yelped the rest of the flight. As big as the canyon i
s, it still feels like your wing tips will hit the sides, once down in the
bottom right over the river.
Had the opportunity to fly it every year since then. Think that was 2006.
john h
mkIII
To keep from getting bored with the scenery I went to the Canyon, which
always holds fascination for me. Larry
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| Subject: | Re: Look! It's Chitty-Chitty-Bang-Bang for sale! |
N111KX (Kip) wrote:
> That thing is UGLY! [Laughing]
Maybe so, but I love the idea of it. The real Chitty Chitty Bang Bang car was
much cooler (but I may be a little biased since I loved that movie as a kid).
Striking similarity in the two pictures here? Could Miss P'fer be a distant cousin?
:D
do not archive
--------
Cristal Waters
Kolb Mark II Twinstar
Rotax 503 DCSI
Read this topic online here:
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Attachments:
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http://forums.matronics.com//files/chitty_chitty_bang_bang_145.jpg
Message 10
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| Subject: | Re: Look! It's Chitty-Chitty-Bang-Bang for sale! |
> Striking similarity in the two pictures here? Could Miss P'fer be a
distant cousin? :D
> Cristal Waters
She ain't no relation! ;-)
john h
mkIII
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| Subject: | Re: Anyone have experence with Hirth F-30? |
At 12:56 AM 3/19/2009, you wrote:
>Hello Folks,
>
>Does anyone have experience with a Hirth F-30 2 cycle; it is now
>available with "85hp fuel injected, dual ignition, with high torque
>version, fan cooled, G-40 gear box". It sounds like some of the
>small Hirth are not well liked, but there is a bit of a cat fight
>out there on the web between Rotax and Hirth owners!
>
>I am all ears!
We got a 70 HP - with problems - at the farm.
But I wouldn't want to comment on that particular engine on this list.
Oil leaks, gear box problems - engine out (frame damage - lot of work).
But, they say they have fixed them........
I don't like Hirth's, (the old ones or the new ones) so I shouldn't
comment anyway.
Message 12
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| Subject: | Re: Anyone have experence with Hirth F-30? |
> We got a 70 HP - with problems - at the farm.
> But I wouldn't want to comment on that particular engine on this list.
> Oil leaks, gear box problems - engine out (frame damage - lot of work).
> But, they say they have fixed them........
> I don't like Hirth's, (the old ones or the new ones) so I shouldn't
> comment anyway.
Possum:
Thanks for not commenting on the Hirth reputation.
Like a some of the Rotax and Cuyuna engines I owned and flew in front of,
they quit making noise at the most inopportune times. Uncommanded silence.
I don't know anything about them except what I hear or happen to see at a
flyin somewhere. We do not have any in my neck of the woods.
Someone mentioned a mkIIIx at last year's Kolb Homecoming flying with a
Hirth. I did see that one fly. However, I believe it was trailered to
Labhart Field, and trailered home. Good looking Kolb.
john h
mkIII
Message 13
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| Subject: | Re: Owyhee Canyon Pictures |
Larry
This just doesn't sound right. Your going to have problems when it warms
up. I'm sure you told us before but are you running too lean? What do
your spark plugs look like? What temps are the other Kolb HKSs running?
My VW guru has me jetting my VW on what I would say is on the rich side.
A bit richer than I see on a water cooled engine. Seems like running a
bit rich lowered my VWs oil temps but not my cht. Go figure. My VW CHTs
run on the cool side but when pushed beyond cruise power they warm up.
Are you running with too much prop pitch. Do you notice a large noise
reduction when pulling power back to cruise power? Do you need to
fashion some cooling scoops around those cylinders. My VW needs to have
cooling air forced all the way around the cylinders and thru the heads.
But a HKS has only one cylinder on each side so cooling should fine but?
Most HKSs run with a big fan in front, do you need something extra in
pusher mode.
Rick Neilsen
Redrive VW powered MKIIIC
----- Original Message -----
From: Larry Cottrell
To: kolb-list@matronics.com
Sent: Thursday, March 19, 2009 9:26 PM
Subject: Kolb-List: Owyhee Canyon Pictures
http://www.facebook.com/album.php?aid 12888&id=1002056194&l=358dc
9273a
The weather was good today even though the lighting was a bit flat, so
I flew again in my attempt to break in my HKS before I have to try to
keep up with a bunch of Mark III's this May after MV.
To keep from getting bored with the scenery I went to the Canyon,
which always holds fascination for me. I flew for 1hour and 18 minutes
traveling 79 miles. I flew the first 45 minutes at 5000 RPM's on one
tank and then switched to the rear tank and flew at 5400 RPM"S. The
weird thing about it is that there is no noticeable difference in fuel
burn. Temps are still high and I had to fly with the choke on to keep
the temps under control on my way back. I have 18 hours on the engine
now. At 5000 RPMs the temps were 316 tops. The only trouble with that is
that I don't like to fly that slow. :-)
Larry
Message 14
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| Subject: | Off list - Hirth reputation. |
John This is a new engine with less than 40 hrs. 70HP? - maybe -
Water cooled.
Oil leak...seals fixed
Reed values ..runs hot - fixed
Gear Box - bolt sheared - engine quit - plane crashed.
The old ones were the same way, they work great on those
little race cars that can run them up to 10,000 RPMs and
have gears, but can't handle the constant prop load on a plane.
A lot of engines have the same problem.
Just between you and me and the fence post--
Screw Hirth engines. Bill has tried them several times
over the last 12 years. Along with AMC engines and a few others.
I've got way over what I should have on my 503 "1997 Rotax" engine without
a rebuild and it still runs like a Toyota.
> > We got a 70 HP - with problems - at the farm.
>>But I wouldn't want to comment on that particular engine on this list.
>>Oil leaks, gear box problems - engine out (frame damage - lot of work).
>Possum:
>
>Thanks for not commenting on the Hirth reputation.
>
>
Message 15
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| Subject: | Vapor Pressure and E-10 mogas |
In this month's issue of Ultraflight magazine, in Rotax Talk by Ronnie Smith, he
says (for those of us using two-strokes and E-10 mogas):
"Remember also that there will be an altitude limit on the use of this 10% [ethanol
gas]. I think it's around 7500 ft. MSL. Why? Well, car gas will start to
vapor lock at higher altitudes so you have to watch this."
He goes on to say that if we're flying about 7500 ft MSL we should use 100LL which
has a lower vapor pressure than auto gas.
Anyone heard of this? Had this happen? I know I'll be flying above 7500 MSL on
my flight to Florida and am curious if any of you other two-strokers have ever
experienced this or heard of it.
Arty Trost
Sandy, Oregon
www.LessonsFromTheEdge.com/uladventure2009.htm
Message 16
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| Subject: | Re: Owyhee Canyon Pictures |
----- Original Message -----
From: Richard & Martha Neilsen
To: kolb-list@matronics.com
Sent: Thursday, March 19, 2009 10:25 PM
Subject: Re: Kolb-List: Owyhee Canyon Pictures
Larry
This just doesn't sound right. Your going to have problems when it
warms up. I'm sure you told us before but are you running too lean? What
do your spark plugs look like? What temps are the other Kolb HKSs
running? My VW guru has me jetting my VW on what I would say is on the
rich side. A bit richer than I see on a water cooled engine. Seems like
running a bit rich lowered my VWs oil temps but not my cht. Go figure.
My VW CHTs run on the cool side but when pushed beyond cruise power they
warm up. Are you running with too much prop pitch. Do you notice a large
noise reduction when pulling power back to cruise power? Do you need to
fashion some cooling scoops around those cylinders. My VW needs to have
cooling air forced all the way around the cylinders and thru the heads.
But a HKS has only one cylinder on each side so cooling should fine but?
Most HKSs run with a big fan in front, do you need something extra in
pusher mode.
Rick Neilsen
Redrive VW powered MKIIIC
Rick,
I agree, I think that what I am going to try when my first oil
change comes up in7 or so hours is to take the oil cooler off the top of
the wing and install it upside down at the rear of the cage. Perhaps the
cooler is blocking enough air off the engine that it is causing it to
over heat. As for the pitch of the prop, it is set so that I get 6150 at
WOT, that is 50 off the max RPM's.
As you can see the muffler and oil cooler block a lot of air. I am
just not sure if moving the cooler will make that much difference
however. Oh if you are wondering this was the set up that was sucessful
on a Slingshot. I am not convinced that it is going to work on a
Firestar however.
Larry
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