lml@lancaironline.net Mailing List Archive

<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Harry, I was forwarded your e mail by some of my customers. The statement which I make to customers as part of my Oshkosh forum presentation and as part of the brochures is slightly different from your statement while centering on the 8% number you quote. I state that no customer has gotten less than an 8% fuel burn reduction. Dick Perry got far better than that. I state that speed can be increased but it is something that requires action on the owners part. As Dick Perry stated his speed is about the same. "About the same" is not the same as remains dead equal. What happens is the engine runs far cooler and the expansion in the lower cowl half is far less which at the SAME air inlet and exit size causes a slight speed gain. Generally 2 to 3 knots. I do not think Dick will disagree with that. However, I did state that we typically see 6 to 8 knots total gained IF the air outlet is closed down by closing the cowl flaps to take advantage of the lower operating temperatures. Dick cannot do that as he has a fixed outlet and inlet as Dick stated. Therefore, if you change your statement from 8% to 8 knots and add the rest of the sentence about the outlet then you are correct. As to questions about on our ability to deliver on time and at the fixed prices quoted I suggest that you ask Dick Perry those questions as he can tell you that we came in on budget and on time along with saving him nearly $1,000 on his propeller. The coatings are a wonderful answer to the heat and wear problems of many engines. The TSIO-550 is especially a benefactor. On those engines we see 13% fuel burn reductions with 50 degree oil temp reductions and 75 degree CHT reductions. We run these engines as what we refer to as our "Medium Altitude Drone Engine" to 40,000 ft. in military applications. There we have found that we can double the top end life over the currently (non ZEHRBACH coated) miserable TBO. Dick Perry's installation prior to our modifications was not a very hot running installation. His temperatures did not plummet so much. We find that the hotter the installation is running the larger the drop in the temperatures. Customer Mike Hillyer has two of my engines, a 360 and a 540 in Velocity aircraft. There the CHT fell from 460 to 400 degrees and the oil temp fell from 230 to 192. Send me your physical address and I will send you a copy of Mikes testimonial. He has had his aircraft with my engines in them on display at Sun in Fun and at Oshkosh. Mike also reported zero blowby the same as Dick. Darus Zehrbach >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>