stunthanger.com
Engine basics => Engine set up tips => Topic started by: John Leidle on September 18, 2014, 01:54:17 AM
-
Does anyone know what a ROJETT 76 & or 65?
John
-
The RO-Jett .76 is 355.5 grams (12.54 oz) with the two header screws, but no header, no spinner, a standard prop nut and a rather small washer.
As I understand it, the .65 isn't made anymore, but the .61 is, and a newer .67 is apparently built on the .76 case.
H^^ Steve
-
Actually the .67 is built on the 61/65 case but has a larger cylinder. Interchangeable, mount wise with the 61/65s. When I get 'roundtuit I'll dig mine out and weigh it. Should only be slightly heavier than the 61/65s. 8)
-
I wonder if Dubby could convert a .65 to a .67? Tho most .65's got converted to .61's, the 2-piece barstock cases might give some options. Dubby converted a .76 side exhaust to rear exhaust for me, and pretty inexpensively. y1 Steve
-
The .65 is/was a .61 sleeve bored larger. The issue was the sleeve got too thin with the .65 with really no more power. I doubt a .67 is viable with the .61 sleeve. I would be inclined to stick with the proven designs that have been de-bugged. I've not used the .67 but consider my BSERE .40s, .61s, and .76s the best engines I have. That .40 I think would make the best Classic engine you could get. Awesome power in a .25 sized case. Very light.
Dave
-
Hi Dave , I believe the .67 is a stroked . 61 ,,,not gonna bet my SSI check on it but I believe that is what they did. I going to order a .76 today, thank you for your help. D>K
John
-
The RO-Jett 76 and the RO-Jett 61 both have the same mounting dimensions. I built a couple full body planes for the 76, but later dropped in a 61 (complete with 2 1/2" spinner) without modifications to the plane. (the balance was better!)
Floyd