AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Dumb Q re R22          AirTalk.org Forum Index -> Helicopters and rotary wing aircrafts View previous topic :: View next topic   Author Message JohnO Guest Posted: Wed Nov 23, 2005 8:52 pm    Post subject: Dumb Q re R22 How come Robinson never brought out an EFi upgrade? I understand the development, testing and certification would cost a lot but surely the equipment is already available, not THAT expensive, and the safety and performance benefit (no carb heat or mixture controls!) would make it worthwhile? Just curious. Back to top JohnO Guest Posted: Thu Nov 24, 2005 3:12 am    Post subject: Re: Dumb Q re R22 The OTHER Kevin in San Diego wrote: Quote: On 23 Nov 2005 12:52:22 -0800, "JohnO" <johno1234 (AT) gmail (DOT) com> wrote: How come Robinson never brought out an EFi upgrade? I understand the development, testing and certification would cost a lot but surely the equipment is already available, not THAT expensive, and the safety and performance benefit (no carb heat or mixture controls!) would make it worthwhile? Dunno. I'll ask Frank when I see him at the factory safety course... Heh! Don;t forget to report back! Quote: EFI aircraft engines can be finicky to start when hot. As far as mixture goes, I don't know anyone who touches the mixture control in a robby other than to push it down to full rich at engine start and idle cutoff when shutting down. I do know a couple people who tweak mixture in the C300's but it's got a vernier mixture control on it so it's a lot easier to make precise changes.. I'm from a fixed wing background and in cruise we do lean out the mixture until just before power drops. I'm put off by all the things that make an R22 fall down, and I'd heard that there had been problems with leaning out the mixture too much in flight? I guess with the low intertia rotors leaning out too much and not correcting quickly could lead to a crash. Quote: I'd like to see an R44 based turbine powered ship from Robinson myself But why? Isn't the R44 is about as fast as a light turbine anyway? What would happen to the operating costs with a turbine? Do R44 Raven II pilots find that the EFi makes flight much better/safer than the non EFi R44? Cheers, JohnO Back to top Andrew Crane Guest Posted: Thu Nov 24, 2005 10:28 am    Post subject: Re: Dumb Q re R22 "JohnO" <johno1234 (AT) gmail (DOT) com> wrote Quote: I guess with the low intertia rotors leaning out too much and not correcting quickly could lead to a crash. Out of curiosity, how does the low inertia come into play here? Quote: I'd like to see an R44 based turbine powered ship from Robinson myself But why? Isn't the R44 is about as fast as a light turbine anyway? What would happen to the operating costs with a turbine? Well I wouldn't imagine they'd come down :-) Quote: Do R44 Raven II pilots find that the EFi makes flight much better/safer than the non EFi R44? The two machines are poles apart, but I don't know how much that is down to the fuel injection. Certainly not having to mess with carb heat is a plus, as is having bags more power available. Regards Andrew -- Inweb Networks. Quality internet and telecoms services Sales: 08000 612222 Support: 08704322222. http://www.inweb.co.uk E1 call share. 0800, 0845 and 0870 numbers - best rates. Resellers welcome Back to top JohnO Guest Posted: Thu Nov 24, 2005 6:48 pm    Post subject: Re: Dumb Q re R22 Andrew Crane wrote: Quote: "JohnO" <johno1234 (AT) gmail (DOT) com> wrote in message news:1132801923.480924.48700 (AT) f14g2000cwb (DOT) googlegroups.com... I guess with the low intertia rotors leaning out too much and not correcting quickly could lead to a crash. Out of curiosity, how does the low inertia come into play here? I meant low inertia in the rotors means less time to correct rotor RPM decay before it becomes fatal, right? Quote: I'd like to see an R44 based turbine powered ship from Robinson myself But why? Isn't the R44 is about as fast as a light turbine anyway? What would happen to the operating costs with a turbine? Well I wouldn't imagine they'd come down :-) Do R44 Raven II pilots find that the EFi makes flight much better/safer than the non EFi R44? The two machines are poles apart, but I don't know how much that is down to the fuel injection. Certainly not having to mess with carb heat is a plus, as is having bags more power available. Yeah, nice! Back to top rotorhedusa@aol.com Guest Posted: Fri Nov 25, 2005 9:27 pm    Post subject: Re: Dumb Q re R22 JohnO wrote: Quote: The OTHER Kevin in San Diego wrote: On 23 Nov 2005 12:52:22 -0800, "JohnO" <johno1234 (AT) gmail (DOT) com> wrote: Dunno. I'll ask Frank when I see him at the factory safety course... Heh! Don;t forget to report back! EFI aircraft engines can be finicky to start when hot. As far as mixture goes, I don't know anyone who touches the mixture control in a robby other than to push it down to full rich at engine start and idle cutoff when shutting down. I'd like to see an R44 based turbine powered ship from Robinson myself But why? Isn't the R44 is about as fast as a light turbine anyway? What would happen to the operating costs with a turbine? Cheers, JohnO I recently attended the Robinson safety course. No plans for a turbine R-44, but Frank spoke about a larger turbine helicopter, a 5 or six seater in the planning stages. Apparently they have spent (in Frank's words) an exorbitant amount of money researching aviation diesel, to no avail. They were also unable to find a compatible piston engine for their new larger helicopter idea. So it was back to the drawing board, with turbine in mind this time. I can't wait to see what Frank and his engineers come up with! Back to top Simon Robbins Guest Posted: Sat Nov 26, 2005 1:27 pm    Post subject: Re: Dumb Q re R22 <rotorhedusa (AT) aol (DOT) com> wrote Quote: Apparently they have spent (in Frank's words) an exorbitant amount of money researching aviation diesel, to no avail. Isn't there an experimental diesel S300 around somewhere with a Volkswagen engine? (Would that make it a 300 TDi!?) 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