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Area-51
Joined: 03 May 2021
Posts: 429
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 Posted: Thu Mar 13, 2025 1:52 am Post subject: What did you do with you europa this week ending 14/03/25 |
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Check flights today on the 100hp 912ULS Classic install... Nothing short of a total success...
First flights this morning and with my innate skepticism was expecting the entire unit to go "BANG!!!"; but it did not... instead it purred this way, and then it purred that way for about 30 minutes... then i brought it in a little clumsily due to the need to relearn new alternate engine speeds... a good visual scrutiny revealed not one thing requiring attention; so a cup of tea was created and consumed before going up again for an hour, and it certainly got up off the deck and climbed straight through the normal 80hp flat moment of excess undercarriage flaps drag; the aircraft actually just got out in front of me to the point i was saying "i better retract the undercarriage now before i hit 80kt; like right now!"... Take offs are a bit more exciting at the moment as i get accustomed to the new amount of swing as the tail gets up, or blipping of the throttle on rounding out.
This has been a direct swap, retaining 80hp starter motor, exhaust, cooling... the only change has been raising the lower lip of the bottom cowl 1" away from the fuselage. Running temps at cruise so far are 90C/100C, and 80/80 on approach decent... The prop needs repitching due to ratio changes of the 100hp reduction drive.
181 will never be having an 80hp unit reinstalled... more flying tomorrow...
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John Wighton
Joined: 18 May 2010
Posts: 242
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| Posted: Thu Mar 13, 2025 11:49 pm Post subject: Re: What did you do with you europa this week ending 14/03/2 |
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Sounds great. But why have the speeds changed? Changing from 80 to 100 hp should not affect any speeds. Please explain.
| | - The Matronics Europa-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:
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_________________
John Wighton
Europa XS trigear G-IPOD |
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Area-51
Joined: 03 May 2021
Posts: 429
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| Posted: Fri Mar 14, 2025 12:20 am Post subject: Re: What did you do with you europa this week ending 14/03/2 |
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The 80hp uses a 2.27:1 reducer, the 100hp uses a 2.43:1 reducer. So the engine rpm is higher on the 100hp for the same prop rotation speed. The prop was not repitched. So the 100hp redlines well before the propeller load can prevent engine rpm runaway. Its like putting a jensen interceptor motor into a morris minor without changing the diff ratio or rear tyres to suit 😊
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Area-51
Joined: 03 May 2021
Posts: 429
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| Posted: Fri Mar 14, 2025 12:27 am Post subject: Re: What did you do with you europa this week ending 14/03/2 |
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Another 2hrs in the air today proofing the engine swap. Smooth as a button... Temps rock solid at 80/80 the whole way on 43% power; a real joy to fly... signing AF out for unrestricted flight op's 👍
| | - The Matronics Europa-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:
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