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jindoguy(at)gmail.com
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 Posted: Fri Jul 27, 2007 8:38 am Post subject: Hirth 2703 |
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Anyone out there flying a Hirth engine?
Here's the deal, guys. I have a Challenger II Clip Wing in the hangar that I'm supposed to fly to PA next week. I have absolutely no experience with the Hirth and the thing is unsettling to say the least.
I could not, in the hour I've flown it so far, keep the CHT and EGT alarms on the Stratomaster from going off. The CHT alarm is set for 500 degrees and the EGT at 1300.
Yep, you read those numbers right.
I took it around the pattern three times before a short cross country flight. During those, I could keep the CHT's under 400 in climb, and they came right back down when I cut throttle at the threshold on down wind. After I completed the roll out they were back down to 250 or so.
When I flew over to my friend George's house, about 15 miles away, the CHT's were running 512 and 549 and the EGT's were 1225 and 1252 by the time I over flew the pattern back here at home.
The engine will not hold a throttle setting. The owner had attributed this to throttle linkage that wouldn't hold, but I kept my thumb on it the entire flight and I know the throttle did not move, at least on my end of the linkage. It never throttled up, once a setting was made the RPM would not climb uncommanded, but it would bog down several hundred RPM with my thumb holding the throttle in place. A tap on the throttle would bring it back up, but then in a few minutes it would bog again. A couple of times I would have sworn it was going to sieze, but it responded to the throttle and came back up to nice smooth running again.
I've got a feeling this POS is going to PA by trailer at this point.
Did I mention I had the stick almost full forward the entire flight? I'm only 20 pound lighter than the owner and I would swear I had all 20 pounds pushing forward on the stick the whole time in the air.
After today, I really LOVE my Kolb and Rotax.
Rick
--
Rick Girard
"Ya'll drop on in"
takes on a whole new meaning
when you live at the airport. [quote][b]
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rowedenny(at)windstream.n
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| Posted: Fri Jul 27, 2007 1:48 pm Post subject: Hirth 2703 |
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Rich,
In addition to richening by raising the needles as Jack suggested, pull the air filters off and make sure the carb slides are opening at the same time. Close the throttle all the way and put a long sharp pencil under the lip of both slides so they are inline with each other. When the throttle is opened the pencils should move exactly together.
By the sound of the trim issue, even if you solve the rough engine problem, I don't think I would fly it either.
Where in PA is it headed?
Denny Rowe
[quote] ---
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jindoguy(at)gmail.com
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| Posted: Fri Jul 27, 2007 3:32 pm Post subject: Hirth 2703 |
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Eastern PA around the reading area.
Rick
do not archive
On 7/27/07, Denny Rowe <rowedenny(at)windstream.net (rowedenny(at)windstream.net)> wrote:[quote] Rich,
In addition to richening by raising the needles as Jack suggested, pull the air filters off and make sure the carb slides are opening at the same time. Close the throttle all the way and put a long sharp pencil under the lip of both slides so they are inline with each other. When the throttle is opened the pencils should move exactly together.
By the sound of the trim issue, even if you solve the rough engine problem, I don't think I would fly it either.
Where in PA is it headed?
Denny Rowe
[quote] ---
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Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
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| Posted: Fri Jul 27, 2007 6:09 pm Post subject: Hirth 2703 |
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On Jul 27, 2007, at 7:32 PM, Richard Girard wrote:
| Quote: | Eastern PA around the reading area.
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Richard,
Now you are really getting close to our neck of the woods. 08N
Keller Bros is a nice Ultralight friendly airport just west of Reading.
Please let us know when you pass through central Pa and if we can be
of any help.
Gene
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