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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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 Posted: Thu Oct 12, 2006 6:09 am Post subject: More BMW/Kolb info |
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Morning Gang:
Got some bc info from Mike Richardson, ref his BMW powered mkIII.
Mike is a happy luker, but said to share this info with the List if I
wanted to.
Looks like he is doing a fine job getting the new power plant
performing, and getting the kinks ironed out. Sounds like the R1100S
is getting the job done, more in line with performance of 912UL and
912ULS.
Mike is going to send me some photos which I will post to the List.
Take care,
john h
| John,
| Sure enjoyed seeing you and MsP'fer at Hal Roach's.
| Hal sent photos. If you want them scanned and sent let
| me know.
| I saw your request for more BMW powered Kolb info for
| the Matronics list. Since I choose to lurk quietly
| maybe you could pass this on if you care to.
| Here are a few points of interest on our Mk III
| Classic with her new fuel injected, altitude
| compensating, computer controlled, 98 hp. R1100S BMW.
| Presently showing 35 hours on the tiny tach.
| No gap seal to stow anymore if you have to fold the
| wings. That's another story. It does have a fiberglass
| cap for the cabin which will get some vortex
| generators shortly. The Jerry can fuel tanks have been
| replaced by a front filled Jaz 16 gal. high density
| polyethylene blank fuel cell. It weighs what a
| fabricated aluminum tank would have, but plastic
| doesn't seem to condensate. Well, nothing I've ever
| had did but it can and is sumped for water.
| The cabin rear is enclosed, with soundproofing, but
| slopes down from front to rear from the cabin cap to
| allow more air to the prop disc, since this engine is
| rather massive. It's not nearly as petite as the 912s.
| "All up" engine weight with exhaust shown, 3.47
| gearbox, computer, and prop is 192# and that's been
| trimmed by six pounds as there was a little too much
| exhaust weight (.049 SS) boinging around up there and
| it was cracking after only 12 hours. The
| shortened/lightened version has improved performance
| by at least 10% which wouldn't have been known had the
| exhaust plumbing not began to crack.
| The entire motor mount area has been redone to accept
| this engine or others with a pan, ala' GEOs and such.
| The R1100 engines have a spin-on filter up inside the
| bottom of the engine. It could have been mounted on
| top like Hans Van Alphen's R100 but I could see it
| passing me up at some point while I'm saying, "Gee,
| that sure does look like my engine going there!" It's
| where it is and it works, so far.
| The prop is a #283 Kiev (70.9" diameter, I think)
| purchased through South MS Light Aircraft, Ronnie
| Smith and family. They were super to deal with at a
| time when Katrina had dealt them and their neighbors
| some serious difficulties. Prop clearance to the tail
| tube is the same as it was with the 66" on the 582.
| Initially, oil cooling was a problem but has been
| resolved with an additional cooler in series with the
| stocker.
| Climbs out solo (me (at)185 with clothes, never fly naked
| or nekid if you're from KY) at 5900 rpms with 8-10
| gallons of fuel (at)1000-1200'/min, cruises at 75/5200 (at)
| a consistent 3 gallons/hour. Each 100-125 rpms equals
| about a five mph increase in speed and about a half
| gallon per hour increased fuel usage. Full throttle
| from 75 feels like passing gear in a car but better
| and it will reach Vne in a very few seconds. Airspeed
| indicator looks like a tach while accelerating. GPS
| verifies the ASI. I get the distinct indication that
| this Kolb does not like going faster than 85. This
| engine is massive and therefore must be very draggy
| which translates to: I'll just enjoy puttin' along at
| 75-80 where she and I both are happy.
| I'd like a little more wing for a better glide but she
| sure takes off and lands short.
|
| That's about it. Probably more than you ever wanted to
| know about my airplane. I do have photos.
| You take care too, JHauck & the gang.
| Thanks,
| Mike
|
| __________________________________________________
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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NeilsenRM(at)comcast.net
Guest
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| Posted: Thu Oct 12, 2006 7:42 am Post subject: More BMW/Kolb info |
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|
Mike/John
Thanks so much for the update. I definitely want to see photos of the
engine. Sounds like that engine may be a bit heaver than my VW. The power
you are getting is better than my VW maybe it is partly your prop? I would
like to know more about that fuel cell. Mike please join the discussion. You
post to John was very informative and interesting. I believe this is the
first performance related post for the BMWs. And definitely the first for
the R1100S. It sounds like a good Rotax alternative. What did it cost? Is it
smooth running and noise level?
do not archive
Rick Neilsen
Redrive VW powered MKIIIc
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| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
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