Today's Message Index:
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1. 02:27 AM - Re: slingshot (Ted Cowan)
2. 05:52 AM - For Sale (ed hase)
3. 06:29 AM - Re: Kolb Slingshot (Rodney Payne)
4. 07:01 AM - Re: Kolb Slingshot (John Hauck)
5. 07:19 AM - Re: Kolb Slingshot (herb)
6. 07:28 AM - Re: Kolb Slingshot (John Hauck)
7. 07:36 AM - Re: 582 vs 670 fuel burn (herb)
8. 07:43 AM - Re: Kolb Slingshot (alienwes)
9. 07:50 AM - Re: Kolb Slingshot (alienwes)
10. 08:36 AM - Re: 582 vs 670 fuel burn (John Hauck)
11. 11:58 AM - Re: Kolb Slingshot (Thom Riddle)
Message 1
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thought I might reply on line to a couple of questions. Firstly; with the
582 at normal cruise, forget the rpm, around 70 mph, I would get somewhere
about 5 gph burn and 6 gph at around 78 mph. More than that if I were
packed for camping. Had to tape the rad at cooler temps. The 912 gets me a
solid
3 gph burn up to about 4700 rpm, around 75 mph. I now push it harder at
5200 rpm and 95 mph and get around 4 gph burn. In rough air 90s are
somewhat bumpy and touchy on the controls but got a tail wind coming back
from Thomasville last year and was clocking 126 over the ground.
That was nice, dry, cool and smooth. THAT is why I love the 912. I found
out I was actually running it too slow. Supposed to run it up to the 5000s
for best performance. Actually runs cooler now too. By the way, since Miss
Lite changed the gears in my gear box, there is a lot less noise
and at the higher rpm, it is quieter and smoother also. Just thought I
would throw that in. Have a great day. Looking for warmer weather soon.
Ted Cowan, Slingshot, 912 ul, zoom zoom.
Message 2
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I have been a subscriber to this list since I bought a Kolb in pieces
three years ago.
I now have changed the direction I am going and wish to sell the Kolb
parts that I have.
I have a single seat Firestar without a cage or motor (wings, tale tube
and tail plane and control stick is there).
It was a wreck in the rebuild process when I acquired it.
I was going to finish it and replace my quicksilver with it as it is a
more capable airplane, but have ran in to a deal on a two seat Hornet
and am going that route.
If intrusted contact me and I can send photos.
ehase@charter.net
314-681-7050
Message 3
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| Subject: | Re: Kolb Slingshot |
Another way to go for you guys with Mark 3s. Take a look at Rotax Ricks
670 engine. I traded in my 582 for one and put it on my Xtra. It puts
out 89hp and gets about 1 gph better fuel burn. Basically performs like
a 912 on a 582 budget. This is my first yr with it so not alot of time
but I put 60 hrs on it this yr and it was flawless. Make the 2 place
alot more fun to fly when you have the extra power.
Message 4
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Another way to go for you guys with Mark 3s. Take a look at Rotax Ricks 670
engine. I traded in my 582 for one and put it on my Xtra. It puts out 89hp
and gets about 1 gph better fuel burn. Basically performs like a 912 on a
582 budget. This is my first yr with it so not alot of time but I put 60 hrs
on it this yr and it was flawless. Make the 2 place alot more fun to fly
when you have the extra power.
Hopefully, your 670 will prove to be as reliable as a 912 series engine.
john h
mkIII
Titus, Alabama
Message 5
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| Subject: | Re: Kolb Slingshot |
On 02/09/2013 08:29 AM, Rodney Payne wrote:
> Another way to go for you guys with Mark 3s. Take a look at Rotax
> Ricks 670 engine. I traded in my 582 for one and put it on my Xtra. It
> puts out 89hp and gets about 1 gph better fuel burn. Basically
> performs like a 912 on a 582 budget. This is my first yr with it so
> not alot of time but I put 60 hrs on it this yr and it was flawless.
> Make the 2 place alot more fun to fly when you have the extra power.
>
Good looking bird....
wondering why the fuel burn is less than the 582? fuel
Injection...running at lower rpm's? Herb
Message 6
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wondering why the fuel burn is less than the 582? fuel
Injection...running at lower rpm's? Herb
Fuel burn from one aircraft/engine/pilot to another is not consistent and
comparisons are not accurate.
For my own personal use, I have found that the only way to get accurate fuel
burn is during long cross country flights where the throttle is set at
cruise rpm and left there. The flight should be started with a full tank
and topped off on landing.
I get great fuel burn when I am flying local and playing around the airport.
A lot of people figure their fuel burn on this type flying. Then, during
their first serious cross country flight, they are shocked that there engine
is burning so much fuel.
john h
mkIII
Titus, Alabama
Message 7
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| Subject: | Re: 582 vs 670 fuel burn |
* I was thinking about the 582 vs 670 fuel burn in the same airframe...? If I
understood correctly...the 670 puts out 89 hp and burns less fuel...Herb
*
* *
Fuel burn from one aircraft/engine/pilot to another is not consistent and comparisons
are not accurate.
For my own personal use, I have found that the only way to get accurate fuel burn
is during long cross country flights where the throttle is set at cruise rpm
and left there. The flight should be started with a full tank and topped off
on landing.
I get great fuel burn when I am flying local and playing around the airport.
A lot of people figure their fuel burn on this type flying. Then, during their
first serious cross country flight, they are shocked that there engine is burning
so much fuel.
john h
mkIII
Titus, Alabama
* *
> *
> *
Message 8
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| Subject: | Re: Kolb Slingshot |
>From what I have been told, the Rotax Rick uses alot of the same parts as a 582
but also has RAVE valves. The max RPM is 7000 and this is where the extra HP
comes from. You basically send him your 582 when it needs a rebuild and he turns
it into a Rotax Rick 670. What he is doing is common on snowmobiles so he
is really just applying it for out use. I have thought of doing it on my PPC with
a 582 but would like to transition to a fixed wing 912 Kolb eventually. I
will search another forum where Rick put out some good info.
--------
Wesley Elliott
Sport Pilot-PPC
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393916#393916
Message 9
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| Subject: | Re: Kolb Slingshot |
>From Rotax Rick,
> Just so everyone knows a 618 with a 582 exhaust makes only 65 hp. The above 670
was using a 582 exhaust & made 75 hp. The 618 that I sent had no 618 exhaust
with it. ( They were impossible to find, that is why I now build 4 different
styles of that exhaust myself ) My current exhaust will fit the 618 above and
give it the 75 hp it can produce. Here is how it works, send me your runout 582
( or what evrer condition it's in) The O/H cost is $1650 Add $1500 to that
and instead I send you a 670 back. I use your head, carburetors , Ducati Dual
ignition & RV shaft. I install the BH ceramic water pump seal,Redo the 670 crank
with $480 in parts,new spark plugs,wires boots, Jet the carbs,new carb boots,
surface the cylinders & head,make a new coil mount plate,install your RV bottle,
your starter and gearbox, The C/E gearbox flywheel is machined to fit the
670 crank. I can do the clutch as well. new pistons ,all new seals & gaskets,
open the crank oil feed holes, ETC. The 582 prop will work, You will get 700
rpm more. The 670 redline is 7000 rpm, the same Rotax put on the 618,So just
1 to 2 deg's is fine,EP Dalton runs one now. He use to get 6400 rpm on takeoff,
Now he gets 7100 rpm. Doing his 1 hour ride using the same rpm's as the 582
ran he burns 3.5 GPH instead of 5 GPH He runs it at 5600 rpm with floats on a
Quicksilver Sprint and he's 235 lbs.
>
> I did forget to bring up one very important thing, Why did the 670 fail in aircraft
years ago ??? They would buy the 93/94 engine, put a 100 hp pipe on it
and run it like it came, When I did my first 670 crankshaft I found the reason,
The 93/94 670's used the exact same bearing as the early 582's, the 583 snowmobile
and the 580 Sea Doo,. That bearing failed in the 582 aircraft engines and
failed in the 580 Sea Doo, The 583 did not have the problem because there so
fast you can run them wide open for a long time. Rotax put a bigger bearing
in the 95 aircraft modle, (and that is still the cause of every 2 out 3 582 engine
failures) The aftermark guys double slotted the Sea Doo rods to get more
oil to the bearing and that worked. Thats why I say all 582,618's and 670 engines
need 40 to 1 oil ratio. Those bearings will fail sooner or latter without
it. Here is what I do that makes the 670 work now, In the 98 /99 year high output
models ( 132 HP ) they increased the top and bottom eye's and used the same
size crank pin & wrist pin, they filled the gap with much larger roller bearings
. These are the rods we now use since Jan 2010 and we use double slotted
rods to get more oil to the bearing.
> Call me for more help & info . I will tell you what to do if you want to build
your own. I want to keep things safe and not rune the 670 name, It is the very
best 2 cycle engine out there. (239) 572-
--------
Wesley Elliott
Sport Pilot-PPC
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393917#393917
Message 10
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| Subject: | 582 vs 670 fuel burn |
I was thinking about the 582 vs 670 fuel burn in the same airframe...? If
I understood correctly...the 670 puts out 89 hp and burns less fuel...Herb
I understand that. However, how we get our fuel burn figures have to be
consistent or that aren't any good. That's why I shared the illustration
about flying around the patch vs cross country.
It takes fuel to make power.
john h
mkIII
Titus, Alabama - It's 52F, sun is shining, and I am going to drag Gantt IAP
to get the cow crap spread out to dry while I get the mkIII ready to fly to
08A and the EAA Chap 822 monthly meeting. Doesn't look like there is any
wind blowing today. I think I can handle that. ;-)
Message 11
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| Subject: | Re: Kolb Slingshot |
...Then, during their first serious cross country flight, they are shocked that
there engine is burning so much fuel. john h...
Ain't that the truth. I have a friend who flies a Sonex. After making many flights
of generally 1.5 hour duration or less, he figured his fuel consumption at
3.75 gph. Then he flew on a long x-country and landed off-field about 10 miles
before his destination 'cuz he ran out of fuel. He figured he had at least 45
minutes fuel remaining at his destination, which he didn't quite make.
do not archive
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
no engine
FOR SALE
Diamond Katana DA20-A1
Rotax 912 F3
Don't worry about old age... it doesn't last very long.
- Anonymous
Read this topic online here:
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