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stepinwolf
Joined: 21 Jan 2008
Posts: 133
Location: Canada
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 Posted: Mon Jan 03, 2011 8:51 am Post subject: Zenith CH-750 engine choice |
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J.
You might want to get in touch with another 750 builder by the name of André Levesque, who was/is considering the same engine choice. He can be reached on the Zenith Aero website at the following address
http://www.zenith.aero/profile/AndreLevesque?xg_source=profiles_memberList
Good luck with your choices.
regards
Robert
the 701 & 750 Scratch
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jd(at)lawsonimaging.ca
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| Posted: Tue Jan 04, 2011 2:32 pm Post subject: Zenith CH-750 engine choice |
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On 01/03/2011 11:48 AM, Robert Pelland wrote:
Thanks, Robert, hadn't found Andre yet. Seems his major issue with the Rotec is weight,
which is true (224 lbs, all accessories included, as opposed to the Jab at 180 - I'm on a
diet ;')). Same neighbourhood as the O200 and Corvair. But the lightweight all aluminum
Jab may just come at a price. I'm currently flying behind one (so far, so good), and have
been a member of the Jabiru engines list for well over a year, and I just can't help
thinking that the 3300 is not really the strong, robust engine I want for my 750. Steel
cylinders, heads, and crankcases are just plain *tougher*, IMHO. Not that I'm ruling it
out by any means, but the R2800 is intriguing. I like the integral 3:2 planetary PSRU for
the 750, allowing it to swing the longer prop that it deserves. I like the 900 -2100rpm
cruise (vs 2900-3200+). And, of course, it's a *radial* ! Can it get any sexier than that? ;')
--
Regards, J.
- flying Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb
- restoring the 'Johnston Special'
- former C-IGGY CH701 owner/builder, starting CH750 build soon
- http://cleco.ca
+-------------------------------+
| J. Davis, M.Sc. (comp sci) |
| email: jd at lawsonimaging.ca |
| *NIX consulting, SysAdmin |
| http://cleco.ca |
+-------------------------------+
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stepinwolf
Joined: 21 Jan 2008
Posts: 133
Location: Canada
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| Posted: Tue Jan 04, 2011 5:26 pm Post subject: Zenith CH-750 engine choice |
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J,
Describing a radial as being " sexy " in an understatement. In my opinion, airplanes where invented to hang a radial engine on them.  ) However to be practical, my choice will be with the affordable, tried and true.
I was fortunate in being able to purchase a used 80 Hp Rotax for my 701, that will need to be rebuilt. As far as my 750, I have the latest version 2 of the Zenith plans, and since it will be registered as a " homebuilt " rather then an LSA, I will benefit from the weight increase up 1440 lbs gross weight.
The engine will be a 0 time Lycoming that I will have built for me by the local FBO, who also runs the engine rebuilding shop http://www.aero-atelier.com/visitez.htm at the local airport. I originally was planning on a 0230 at around 115 HP, but since it will be used on amphi floats, I plan to get the maximum performance out of the aircraft, and have decided to go with the 0320 at 150 to 160 HP, depending on the compression ratio that will be chosen when it is rebuilt.
I prefer a regular aircraft engine not only because of the resale value, but because it will be easy to find parts when needed, not to mention service at any of the thousands of airfields that we find across both of our nations. I'm not knocking the Rotec, or any other exotic engine, but you will be hard pressed to find any parts, or service for that matter at any of the landing strips you will be flying to if you don't have a conventional aircraft engine. I would also like to add that rebuilt engines such as those I mentioned above, can be purchased locally for about 40% of the cost of a new engine. At O time, and with a good warranty, you can't beat that for a great deal.
A few of my friends have had what we could call, rather bad experiences with their auto conversion engines, and one even had to disassemble the aircraft and have it towed 300 miles back home because he couldn't have it repaired where it landed. This is not something I would be comfortable with
Just my two cents.
regards
Robert
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jd(at)lawsonimaging.ca
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| Posted: Wed Jan 05, 2011 6:25 am Post subject: Zenith CH-750 engine choice |
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Thanks for this, Robert.
| Quote: | J,
Describing a radial as being " sexy " in an understatement. In my opinion, airplanes where
invented to hang a radial engine on them. ) However to be practical, my choice will be
with the affordable, tried and true.
|
Ah, the voice of reason. Sexy can be a siren in disguise ;')
| Quote: | I was fortunate in being able to purchase a used 80 Hp Rotax for my 701, that will need to
be rebuilt.
|
I put about 300 hours on my 701 with a 912UL before selling it. And missing it somewhat
ever since!
| Quote: | As far as my 750, I have the latest version 2 of the Zenith plans, and since
it will be registered as a " homebuilt " rather then an LSA, I will benefit from the
weight increase up 1440 lbs gross weight.
|
Ditto. Although I'm not plans building this time around, been there, done that with my
Sonex, I will also be building homebuilt, and able to take advantage of the 1440 g.w.
Looks like I was close last summer when I flew in to Lachute on my way to Faucheurs.
Beautiful part of the country (and *nice* little aerodrome!).
| Quote: | I originally was planning on a 0230 at around 115 HP, but since it will be used
on amphi floats, I plan to get the maximum performance out of the aircraft, and have
decided to go with the 0320 at 150 to 160 HP, depending on the compression ratio that will
be chosen when it is rebuilt.
|
Interesting. Just out out curiosity, what would the dry weight of the O320 come in at?
| Quote: | I prefer a regular aircraft engine not only because of the resale value, but because it
will be easy to find parts when needed, not to mention service at any of the thousands of
airfields that we find across both of our nations. I'm not knocking the Rotec, or any
other exotic engine, but you will be hard pressed to find any parts, or service for that
matter at any of the landing strips you will be flying to if you don't have a conventional
aircraft engine. I would also like to add that rebuilt engines such as those I mentioned
above, can be purchased locally for about 40% of the cost of a new engine. At O time, and
with a good warranty, you can't beat that for a great deal.
|
Wonder if aero-atelier would have an O200/230 (my initial thought for a power plant, for
most of the reasons you state, before I got sidetracked by the beauty of the Rotec ;') for
me? Or is it more that I find one and bring it to them?
| Quote: | A few of my friends have had what we could call, rather bad experiences with their auto
conversion engines, and one even had to disassemble the aircraft and have it towed 300
miles back home because he couldn't have it repaired where it landed. This is not
something I would be comfortable with
Just my two cents.
regards
Robert
|
Good points, all, thanks for taking time to respond!
--
Regards, J.
- flying Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb
- restoring the 'Johnston Special'
- former C-IGGY CH701 owner/builder, starting CH750 build soon
- http://cleco.ca
+-------------------------------+
| J. Davis, M.Sc. (comp sci) |
| email: jd at lawsonimaging.ca |
| *NIX consulting, SysAdmin |
| http://cleco.ca |
+-------------------------------+
I bought a house, on a one-way dead-end road. I don't
know how I got there.
--- Steven Wright
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stepinwolf
Joined: 21 Jan 2008
Posts: 133
Location: Canada
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| Posted: Wed Jan 05, 2011 5:43 pm Post subject: Zenith CH-750 engine choice |
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[quote] ---
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Long wing + vga's, = lo & slo |
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