---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Thu 01/13/05: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:17 AM - Re: Zenith-List Digest: Stiff springs on carb cables, etc. (John M. Goodings) 2. 08:27 AM - Re: Re: Zenith-List Digest: Stiff springs on carb cables, (Mike Fothergill) 3. 10:10 AM - Re: Re: Zenith-List Digest: Stiff springs on carb cables, etc. (Frank Jones) 4. 10:15 AM - looking for a 701/801 test ride (Mike D'Ambrogia) 5. 01:02 PM - Re: Re: Zenith-List Digest: Stiff springs on carb cables, (Mike Fothergill) 6. 07:15 PM - 601 XL Proformance (ABGS) 7. 09:07 PM - vw engines for ch 701 (Mark Eagar) 8. 10:43 PM - Re: 601 XL Proformance (Steve Mallinson) 9. 10:43 PM - Re: vw engines for ch 701 (Dirk Slabbert) ________________________________ Message 1 _____________________________________ Time: 07:17:41 AM PST US From: "John M. Goodings" Subject: Zenith-List: Re: Zenith-List Digest: Stiff springs on carb cables, etc. --> Zenith-List message posted by: "John M. Goodings" The springs at the ends of the cables running from the carbs to the throttle bell crank on my Rotax 912S were very stiff; the engine always tended to want to creep to full power, even when I had a lot of friction on the throttle friction nuts on the Cessna-type throttle controls in the panel. I didn't want to mess with the springs. My understanding is that they are a safety device: if the throttle cable breaks or whatever, the engine will go to full power, and you will get home! Two things helped quite a lot. (1) I installed a counter-balance spring from the throttle bellcrank to the top of the firewall. This spring and the throttle cable springs balance at about cruise power. I had to try several springs before I found one of the right stiffness - it is counterbalancing TWO throttle cable springs. (2) I sprayed a lubricant into both ends of the throttle cables which creeps along the cable and frees it up. (This was a major help also on the CHOKE CABLE, which tends to be very stiff on Rotax engines.) The bright red lubricant in a spray can goes by the name of RUST CHECK, sold at Canadian Tire stores in Canada. It is much better (much longer lasting) than WD40. John Goodings, C-FGPJ, CH601HD with 912S, Toronto/Waterloo. ________________________________ Message 2 _____________________________________ Time: 08:27:22 AM PST US From: Mike Fothergill Subject: Re: Zenith-List: Re: Zenith-List Digest: Stiff springs on carb cables, etc. --> Zenith-List message posted by: Mike Fothergill Hi John; I agree that both the throttle and the choke cables are very stiff. Re the counterbalance spring: What happens if the "Cessna" type cable breaks between the handle and the firewall? Re the Rust Check: Will it stay fluid forever? Mike CH-601HDS UHS Spinners Do not archive John M. Goodings wrote: > --> Zenith-List message posted by: "John M. Goodings" > > The springs at the ends of the cables running from the carbs to the > throttle bell crank on my Rotax 912S were very stiff; the engine always > tended to want to creep to full power, even when I had a lot of friction > on the throttle friction nuts on the Cessna-type throttle controls in the > panel. I didn't want to mess with the springs. My understanding is that > they are a safety device: if the throttle cable breaks or whatever, the > engine will go to full power, and you will get home! Two things helped > quite a lot. (1) I installed a counter-balance spring from the throttle > bellcrank to the top of the firewall. This spring and the throttle cable > springs balance at about cruise power. I had to try several springs > before I found one of the right stiffness - it is counterbalancing TWO > throttle cable springs. (2) I sprayed a lubricant into both ends of the > throttle cables which creeps along the cable and frees it up. (This was a > major help also on the CHOKE CABLE, which tends to be very stiff on Rotax > engines.) The bright red lubricant in a spray can goes by the name of > RUST CHECK, sold at Canadian Tire stores in Canada. It is much better > (much longer lasting) than WD40. > > John Goodings, C-FGPJ, CH601HD with 912S, Toronto/Waterloo. > > > > > > > ________________________________ Message 3 _____________________________________ Time: 10:10:50 AM PST US From: "Frank Jones" Subject: RE: Zenith-List: Re: Zenith-List Digest: Stiff springs on carb cables, etc. --> Zenith-List message posted by: "Frank Jones" I did exactly the same thing as John with the counterbalance spring. It works well. If the cable breaks between the bellcrank and the throttle I've still got the original Zenith metal rod throttle on the passenger side as backup. Frank Jones C-GYXQ 601XL 912S >Hi John; >I agree that both the throttle and the choke cables are very stiff. >Re the counterbalance spring: What happens if the "Cessna" type cable >breaks between the handle and the firewall? >Re the Rust Check: Will it stay fluid forever? >Mike >CH-601HDS >UHS Spinners >Do not archive > >John M. Goodings wrote: > --> Zenith-List message posted by: "John M. Goodings" > > The springs at the ends of the cables running from the carbs to the > throttle bell crank on my Rotax 912S were very stiff; the engine always > tended to want to creep to full power, even when I had a lot of friction > on the throttle friction nuts on the Cessna-type throttle controls in the > panel. I didn't want to mess with the springs. My understanding is that > they are a safety device: if the throttle cable breaks or whatever, the > engine will go to full power, and you will get home! Two things helped > quite a lot. (1) I installed a counter-balance spring from the throttle > bellcrank to the top of the firewall. This spring and the throttle cable > springs balance at about cruise power. I had to try several springs > before I found one of the right stiffness - it is counterbalancing TWO > throttle cable springs. (2) I sprayed a lubricant into both ends of the > throttle cables which creeps along the cable and frees it up. (This was a > major help also on the CHOKE CABLE, which tends to be very stiff on Rotax > engines.) The bright red lubricant in a spray can goes by the name of > RUST CHECK, sold at Canadian Tire stores in Canada. It is much better > (much longer lasting) than WD40. > > John Goodings, C-FGPJ, CH601HD with 912S, Toronto/Waterloo. > ________________________________ Message 4 _____________________________________ Time: 10:15:56 AM PST US From: "Mike D'Ambrogia" Subject: Zenith-List: looking for a 701/801 test ride --> Zenith-List message posted by: "Mike D'Ambrogia" If anybody in the central CA area is open to giving me a test ride in a 701 or 801 I'd be a happy camper. Not looking for anything heroic, just want to see how they fly prior to possible purchase. Happy to pay for gas and seat time. I fly out of Columbia/O22 but willing to travel to your location. Thx Mike ________________________________ Message 5 _____________________________________ Time: 01:02:45 PM PST US From: Mike Fothergill Subject: Re: Zenith-List: Re: Zenith-List Digest: Stiff springs on carb cables, etc. --> Zenith-List message posted by: Mike Fothergill Hi; Good thought. I had forgotten that it was there. Mike CH-601HDS Do not archive Frank Jones wrote: > --> Zenith-List message posted by: "Frank Jones" > > > I did exactly the same thing as John with the counterbalance spring. It > works well. If the cable breaks between the bellcrank and the throttle > I've still got the original Zenith metal rod throttle on the passenger > side as backup. > > Frank Jones > C-GYXQ 601XL 912S > > > >>Hi John; >>I agree that both the throttle and the choke cables are very stiff. >>Re the counterbalance spring: What happens if the "Cessna" type cable >>breaks between the handle and the firewall? >>Re the Rust Check: Will it stay fluid forever? >>Mike >>CH-601HDS >>UHS Spinners >>Do not archive >> >>John M. Goodings wrote: >>--> Zenith-List message posted by: "John M. Goodings" > > > >>The springs at the ends of the cables running from the carbs to the >>throttle bell crank on my Rotax 912S were very stiff; the engine > > always > >>tended to want to creep to full power, even when I had a lot of > > friction > >>on the throttle friction nuts on the Cessna-type throttle controls in > > the > >>panel. I didn't want to mess with the springs. My understanding is > > that > >>they are a safety device: if the throttle cable breaks or whatever, > > the > >>engine will go to full power, and you will get home! Two things > > helped > >>quite a lot. (1) I installed a counter-balance spring from the > > throttle > >>bellcrank to the top of the firewall. This spring and the throttle > > cable > >>springs balance at about cruise power. I had to try several springs >>before I found one of the right stiffness - it is counterbalancing TWO >>throttle cable springs. (2) I sprayed a lubricant into both ends of > > the > >>throttle cables which creeps along the cable and frees it up. (This > > was a > >>major help also on the CHOKE CABLE, which tends to be very stiff on > > Rotax > >>engines.) The bright red lubricant in a spray can goes by the name of >>RUST CHECK, sold at Canadian Tire stores in Canada. It is much better >>(much longer lasting) than WD40. >> >>John Goodings, C-FGPJ, CH601HD with 912S, Toronto/Waterloo. >> > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 07:15:28 PM PST US From: "ABGS" Subject: Zenith-List: 601 XL Proformance --> Zenith-List message posted by: "ABGS" Hi I am thinking of building a 601 XL with a 3300 Jab Motor I am requesting from anyone with the same aircraft how it proforms eg. Speed, Climb, etc Thank you Fly Safe Allan Cummins Spinners www.cumminsspinners.com ________________________________ Message 7 _____________________________________ Time: 09:07:02 PM PST US From: "Mark Eagar" Subject: Zenith-List: vw engines for ch 701 --> Zenith-List message posted by: "Mark Eagar" Hi, wondering if anyone has experience adapting a vw engine to the 701. how hard was it, etc. thanks Mark in El Dorado Hills, CA tail section complete, waiting on rest of kit. ________________________________ Message 8 _____________________________________ Time: 10:43:11 PM PST US From: "Steve Mallinson" Subject: RE: Zenith-List: 601 XL Proformance --> Zenith-List message posted by: "Steve Mallinson" Allan, Me too. So I would echo the request to anyone with an XL with the 3300. Are the specs and performance figures on the ZAC website accurate? Conservative? Optimistic? I'd like to throw in additional questions of what type of fuel do you use? What sort of consumption to you get? Also what type of oil do you use/what's your climate? And lastly, any idea of cost to overhaul the engine? For those installing a new engine and not a Subaru or Corvair, etc., the Jab seems to be the perfect engine for the Zodiac XL. Thoughts or comments? Agree? Disagree? Those with other types (ie. like a 912S obviously) feel free to chime in if you disagree. Greedy, aren't I? :-) Any help to any of the above appreciated. Thanks, Steve Toronto Not building yet... :-( Will be a kit builder when I get started, not one of those crazy plans builders... ;-) -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of ABGS Subject: Zenith-List: 601 XL Proformance --> Zenith-List message posted by: "ABGS" Hi I am thinking of building a 601 XL with a 3300 Jab Motor I am requesting from anyone with the same aircraft how it proforms eg. Speed, Climb, etc Thank you Fly Safe Allan Cummins Spinners www.cumminsspinners.com advertising on the Matronics Forums. ________________________________ Message 9 _____________________________________ Time: 10:43:11 PM PST US From: "Dirk Slabbert" Subject: Re: Zenith-List: vw engines for ch 701 --> Zenith-List message posted by: "Dirk Slabbert" Mark, Out here we have limited resources, so of course I had a look at this, comes out far too heavy at 210 lbs. Cooling is a big problem, you'll have to redesign the cowling, still then it does'nt work on a hot day. The VW is essentially a 60 hp engine for 210 lbs, in normal configuration, getting anything more out of it means hot rodding, and winding it up, this is where the cooling problems start. Do the hp/cyl capacity calculation, the Lyc 235 is 3850cc and 115 hp, if you apply this on a 2000cc vw you get 60 hp, if you want to stay anywhere near reliable. I'd go for the Lycoming any day, if you can live with the weight, for it is the same. In short, adding engine weight upsets your w/b and limits your payload, which cannot be rectified by adding weight rear, for you'll be over gross. See where the Rotax comes in? 80 hp for 146lbs installed, with the cooling sorted out, easy to see how Chris designed the 701 with this engine in mind. Have a look at the Verner 133m too, could be an alternative. Just some thoughts, hope it helps. Dirk 701 Piketberg, South Africa ----- Original Message ----- From: Mark Eagar To: zenith-list@matronics.com Sent: Friday, January 14, 2005 7:05 AM Subject: Zenith-List: vw engines for ch 701 --> Zenith-List message posted by: "Mark Eagar" Hi, wondering if anyone has experience adapting a vw engine to the 701. how hard was it, etc. thanks Mark in El Dorado Hills, CA tail section complete, waiting on rest of kit.