DROOL FACTOR-THE UL260i
Speaking of comparisons .I accept that UL power is way out of the league of the engines that follow but if I could swing it this is what would be adorning the front of Good Flight Irene.It is currently under development by the owner of a Sonex. Price for the 97HP is down due to Euro politics,and did I mention it is a full control FADEC........http://www.ulpower.net/prices-us.html
Excellent article comparing the Aerovee,Revmaster,Great Plains and Hummel http://www.eaa.org/experimenter/articles/2010-02_powerplants.asp
Aerovee
Displacement-2180 cc
Continuous HP 80 @ 3400rpm
Bore - 92 mm
Stroke - 82 mm
Weight - 160 lbs 151 with optional Nikasil Cylinders
Alt output - 20 Amps
Compression ratio 8 to 1
Continuous HP 80 @ 3400rpm
Bore - 92 mm
Stroke - 82 mm
Weight - 160 lbs 151 with optional Nikasil Cylinders
Alt output - 20 Amps
Compression ratio 8 to 1
Revmaster
Displacement- 2331 cc
Continuous HP 80 @ 3000rpm 85 @ 3200
Bore - 94 mm
Stroke- 84 mm
Weight - 170 lbs
Alt output - Dual 20 amps each
Compression ratio 8 to 1
k here to edit.
Great Plains
Displacement-2180cc
Continuous HP 76 @ 3400rpm. 80 @ 3600
Bore - 92 mm
Stroke - 82 mm
Weight - 165 lbs
Alt output-35 amps
Compression ratio 8 to 1
Continuous HP 76 @ 3400rpm. 80 @ 3600
Bore - 92 mm
Stroke - 82 mm
Weight - 165 lbs
Alt output-35 amps
Compression ratio 8 to 1
Scott Casler Hummel -my pick
85 hp 94 mm bore x 86 mm stroke 2400 cc 137 to 167 lbs.
Options- Starter, Alternator, Accessory Case, Aluminum Nicom Cylinders, Dual Ignition
Options- Starter, Alternator, Accessory Case, Aluminum Nicom Cylinders, Dual Ignition
I had a gentleman send this well thought out letter on his opinions about the above engines.I thought it rather good and wish to share it .Submitted Information:Name
Mark W
Email
Comment
Mike,
I followed your interesting discussion on the Sonex builders site regarding the choice between the Revmaster, Aerovee, Great Plains, and Hummel engines. There you wrote:
"Indeed,I really haven't taken a good look at the Hummel though a quick peruse of the site brought to my attention that the 2180cc 76hp choice can be had for $6200 built and test run.Thats $800 less than the Aerovee and you don't have to assemble it.Not a whole lot of info on the web site.eg;what type of prop hub/crank assembly does he use? . :geek:"
I'm not an expert, but like you I'm looking for the right engine for my project (which I think will be a CX5, but possibly a Sonex). My two cents:
In response to your question above: Humel uses the Force One hub to take prop loads. If I recall correctly, I read that he buys the hubs from Great Plains.
My non-professional impression of the whole comparison:
Revmaster 2300: Looks like the overall most solid engine for aviation use. The massive front hub and the fat fins on the head for heat dissipation are big selling points to me. Their ignition/alternator solution looks solid, their RevFlow carb gets good reviews. As far as "bang for the buck" it looks like a great piece of hardware, all built by a company which has been int he business for decades, for a few hundred dollars more than the Aerovee kit (with parts that I might have to file to fit, etc). The engine also puts out more horsepower at lower RPMs, where it is useable. The better head cooling means being able to keep power settings higher for longer during the climb. Cons for the Revmaster: The proprietary parts (the same thing that puts them on the top of the heap, IMO). Where do I go when the coil on the alternator needs servicing? When the ignition module is acting up? Only Revmaster.
Aerovee: Pros: It's the Monnet approved solution. If I end up building a Sonex that will carry some weight. Cons: I'm not sold on using the stock VW bearing to take the prop loads, and the shrink-fit prop hub just doesn't inspire confidence. The kit doesn't strike me as a great value
Great Plains: That Force One hub sounds like a very solid product--zero failures in many years of use. Also, looking at his catalog is an education itself--you can pretty much pick any combination of displacement, ignition type, alternator, etc and then build it yourself or have them do it (I'd probably go with the latter). Seems like a good value from a company with a solid reputation. They also are very honest in saying that many of their parts are stock VW racing parts, and I think when little things give out it will be simple to find replacements.
Hummel: I've read many favorable reviews about Scott Casler, the guy who owns the company and builds the engines. The prices seem very good (less $$ for a completed, test-run engine than for an Aerovee kit I'd have to build myself.) Force One hub. Seems to me that going with Hummel is likely to result in an engine with the same parts as a Great Plains engine, which means I could get replacements when needed (ignition, alternator, etc). I'd probably choose between Great Plains and Hummel based on price and (more importantly) after a discussion with each proprietor so I could determine who I'd be more comfortable with.
Other notes: I've been waiting for that Revmaster 3000 100HP engine for a long time, I don't think it's coming soon. I've heard the downturn in the economy
took the wind out of their sails for this development effort, so I'll probably content myself with one of these 2300-2400cc engines.
Thanks for your site and for your postings on the Sonex Builder's site. I didn't register there because I just don't need another membership/account--at least not until I decide to build a Sonex.
Good luck with your Onex project!
Mark W
Comment
Mike,
I followed your interesting discussion on the Sonex builders site regarding the choice between the Revmaster, Aerovee, Great Plains, and Hummel engines. There you wrote:
"Indeed,I really haven't taken a good look at the Hummel though a quick peruse of the site brought to my attention that the 2180cc 76hp choice can be had for $6200 built and test run.Thats $800 less than the Aerovee and you don't have to assemble it.Not a whole lot of info on the web site.eg;what type of prop hub/crank assembly does he use? . :geek:"
I'm not an expert, but like you I'm looking for the right engine for my project (which I think will be a CX5, but possibly a Sonex). My two cents:
In response to your question above: Humel uses the Force One hub to take prop loads. If I recall correctly, I read that he buys the hubs from Great Plains.
My non-professional impression of the whole comparison:
Revmaster 2300: Looks like the overall most solid engine for aviation use. The massive front hub and the fat fins on the head for heat dissipation are big selling points to me. Their ignition/alternator solution looks solid, their RevFlow carb gets good reviews. As far as "bang for the buck" it looks like a great piece of hardware, all built by a company which has been int he business for decades, for a few hundred dollars more than the Aerovee kit (with parts that I might have to file to fit, etc). The engine also puts out more horsepower at lower RPMs, where it is useable. The better head cooling means being able to keep power settings higher for longer during the climb. Cons for the Revmaster: The proprietary parts (the same thing that puts them on the top of the heap, IMO). Where do I go when the coil on the alternator needs servicing? When the ignition module is acting up? Only Revmaster.
Aerovee: Pros: It's the Monnet approved solution. If I end up building a Sonex that will carry some weight. Cons: I'm not sold on using the stock VW bearing to take the prop loads, and the shrink-fit prop hub just doesn't inspire confidence. The kit doesn't strike me as a great value
Great Plains: That Force One hub sounds like a very solid product--zero failures in many years of use. Also, looking at his catalog is an education itself--you can pretty much pick any combination of displacement, ignition type, alternator, etc and then build it yourself or have them do it (I'd probably go with the latter). Seems like a good value from a company with a solid reputation. They also are very honest in saying that many of their parts are stock VW racing parts, and I think when little things give out it will be simple to find replacements.
Hummel: I've read many favorable reviews about Scott Casler, the guy who owns the company and builds the engines. The prices seem very good (less $$ for a completed, test-run engine than for an Aerovee kit I'd have to build myself.) Force One hub. Seems to me that going with Hummel is likely to result in an engine with the same parts as a Great Plains engine, which means I could get replacements when needed (ignition, alternator, etc). I'd probably choose between Great Plains and Hummel based on price and (more importantly) after a discussion with each proprietor so I could determine who I'd be more comfortable with.
Other notes: I've been waiting for that Revmaster 3000 100HP engine for a long time, I don't think it's coming soon. I've heard the downturn in the economy
took the wind out of their sails for this development effort, so I'll probably content myself with one of these 2300-2400cc engines.
Thanks for your site and for your postings on the Sonex Builder's site. I didn't register there because I just don't need another membership/account--at least not until I decide to build a Sonex.
Good luck with your Onex project!