21 Oct 2025, 04:20 [ UTC - 5; DST ]
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Post subject: Re: Spirit Engineering SE-1 Posted: 28 Jul 2025, 13:01 |
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Joined: 01/10/17 Posts: 2390 Post Likes: +1784 Company: Skyhaven Airport Inc
Aircraft: various mid century
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After watching the video of the SE-1 tipping up on landing and seeing the photos of the trailing link type gear I think they have it backwards.
Under heavy braking or during firm arrival the rear kneeling gear will swing back causing the center point of the wheel contact to move aft. Trailing link is great on a tricycle gear airplane...
If they reversed the design to be similar to a Ryan STA or PT-22 then the axle moves forward slightly on compression and helps prevent the airplane from going on its nose.
It's not a trailing link but the geometry may help ground handling and still fit the existing fairings.
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Post subject: Re: Spirit Engineering SE-1 Posted: 01 Oct 2025, 05:02 |
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Joined: 02/08/08 Posts: 6436 Post Likes: +4674 Location: Seattle
Aircraft: A36
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The latest installment of the Sporty's Pilot's Discretion podcast features an interview with Steve Wood, the owner of Spirit Engineering. It's an excellent conversation.
_________________ -Bruce bruceair.wordpress.com youtube.com/@BruceAirFlying
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Post subject: Re: Spirit Engineering SE-1 Posted: 01 Oct 2025, 14:38 |
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Joined: 12/08/12 Posts: 1317 Post Likes: +1769 Location: Ukiah, California
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Username Protected wrote: The latest installment of the Sporty's Pilot's Discretion podcast features an interview with Steve Wood, the owner of Spirit Engineering. It's an excellent conversation. This IS an excellent conversation, thanks for the link! Dan
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 08:39 |
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Joined: 07/11/11 Posts: 2402 Post Likes: +2733 Location: Woodlands TX
Aircraft: C525 D1K Waco PT17
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Username Protected wrote: make it a tandem, and a 4cyl 100ish horse version of that motor for ~95K and id place an order tomorrow. They do this, and these aircraft will start selling like pancakes - and perhaps we will start having pilots who know how to use their feet once again. What a neat design!
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 09:24 |
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Joined: 12/22/17 Posts: 1037 Post Likes: +1794 Location: Nova Scotia
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https://youtu.be/Pn1jIxhQ958Not sure how to embed on my iphone. Here is a great video with a lot of the factory and their processes. The CEO says they’re making it able to be a tricycle gear configuration. They are really turning out a lot of them
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 10:37 |
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Joined: 03/01/17 Posts: 1236 Post Likes: +817 Location: CA
Aircraft: V35, C150
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Username Protected wrote: A tandem version would be a real challenge to remain within the S-LSA weight limits. I agree it would be a winner.
The fact that they developed their own engine (remarkably!) gives hope in that they could add a piston or two and stretch the thing.
But as we say in aerospace, mass begets mass. With Mosaic, they wouldn’t have to comply with LSA rules. That may mean more certification work (not sure) but the pilot side of the equation won’t be a limiting factor.
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 12:25 |
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Joined: 10/25/13 Posts: 149 Post Likes: +181
Aircraft: V35B
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Username Protected wrote: A tandem version would be a real challenge to remain within the S-LSA weight limits. I agree it would be a winner.
The fact that they developed their own engine (remarkably!) gives hope in that they could add a piston or two and stretch the thing.
But as we say in aerospace, mass begets mass. True, im not sure how MOSAIC changes this. I am absolutely floored that they developed an in house engine.. Honestly the owner and this company feel like a breath of fresh air. Seems like they did a lot of amazing engineering, and no BS "heres a fiberglass mockup, give us a 50K deposit and in a decade we might build 5 then go bankrupt". They seem like real straight shooters. Honestly I was/am very tempted to buy one... but my wife asked the deadly question "where will I sit?" and then said "booooo" when I said "well at home i guess" She has zero interest in getting a license herself, but she absolutely LOVES going for a ride in any aircraft. So i really need two seats.
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 12:46 |
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Joined: 11/03/08 Posts: 16852 Post Likes: +28561 Location: Peachtree City GA / Stoke-On-Trent UK
Aircraft: A33
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Username Protected wrote: The fact that they developed their own engine (remarkably!) gives hope in that they could add a piston or two and stretch the thing. there are a lot of degrees of "developed an engine". How close is it to a motorcycle engine? Shares part numbers with one ?
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 15:47 |
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Joined: 10/25/13 Posts: 149 Post Likes: +181
Aircraft: V35B
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Username Protected wrote: The fact that they developed their own engine (remarkably!) gives hope in that they could add a piston or two and stretch the thing. there are a lot of degrees of "developed an engine". How close is it to a motorcycle engine? Shares part numbers with one ?
They talked about how their first idea was to use a commercially available motorcycle engine, but were unhappy with it for various reasons. I dont know about parts binning, it wouldn't surprise me if they used some off the shelf parts, but the case and jugs look pretty proprietary. I know it is dry sump.
Attachment: engine-isometric-15jul25-1024x911.jpg
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 16:02 |
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Joined: 05/03/12 Posts: 2298 Post Likes: +715 Location: Wichita, KS
Aircraft: Mooney 201
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Username Protected wrote: make it a tandem, and a 4cyl 100ish horse version of that motor for ~95K and id place an order tomorrow. They do this, and these aircraft will start selling like pancakes - and perhaps we will start having pilots who know how to use their feet once again. What a neat design!
I agree with this sentiment as well, and for that reason love the idea of the newish Junkers A50, but haven't sat in one yet, much less flown one. The price is too high for a toy plane, at least for me, but I sure think I would LOVE to have one at home for nice evening flights that can be shared with a passenger.
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 16:39 |
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Joined: 11/03/08 Posts: 16852 Post Likes: +28561 Location: Peachtree City GA / Stoke-On-Trent UK
Aircraft: A33
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Username Protected wrote: They talked about how their first idea was to use a commercially available motorcycle engine, but were unhappy with it for various reasons. I dont know about parts binning, it wouldn't surprise me if they used some off the shelf parts, but the case and jugs look pretty proprietary. I know it is dry sump. Attachment: engine-isometric-15jul25-1024x911.jpg That's interesting. I could certainly see a case for using motorcycle engine jugs on a new-design bottom end. I wonder if that is what they did ? In that scenario, you might think that expanding to a 2nd row of cylinders is not a giant leap.
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Post subject: Re: Spirit Engineering SE-1 Posted: 09 Oct 2025, 20:12 |
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Joined: 01/23/13 Posts: 9366 Post Likes: +7060 Company: Kokotele Guitar Works Location: Albany, NY
Aircraft: C-182RG, C-172, PA28
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Username Protected wrote: I agree with this sentiment as well, and for that reason love the idea of the newish Junkers A50, but haven't sat in one yet, much less flown one. The price is too high for a toy plane, at least for me, but I sure think I would LOVE to have one at home for nice evening flights that can be shared with a passenger. The funny thing to me is that the SE-1 and the Junkers essentially serve the same mission: look old & be fun. It costs an extra $230,000 to be able to take a friend. I don't know if I have any friends that I like $220,000 worth 
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