My last post I stated that my electric coolant pump failed during flight and I had to set down in a field before damage occurred. I went from 500ft to landed in about 30 seconds. The problem was during flight the pump cycles on and off because it cools the engine to much. Rotorway says that their pumps stay on once they lift off and the pump stays on thereafter. Stewart Warner said the pump motor was bad and replaced under warranty. My issue now is I dont want the pump cycling on and off during flight and having the issue of it not starting up again. It looks like I may have to create a type of baffling to cover part of the radiator to heat up the coolant a little more. Have any of you heard of this issue before? Could it be that my engine runs that efficient?
The VPS engine thread on 'the other' site keeps descending into a bitch session - would anyone care to post some factual, non-personal information here? I have had a look at the burrbuilt website, but can't find much on it (I found the site design pretty difficult to navigate). I'm not contemplating buying one, just curious from a mechanical point of view. I have seen many engines with outstanding performance figures quoted, (motorcycles are famous for it!) but when you get down to detail, find that the figures are either fictional or only apply for very brief duty cycles. I'm confident that Andrew's design is not fictional, but I would like to know how he achieves added performance while still running Mogas. In my experience here, the 95 unleaded will not run a compression ratio of much more than 9:1 without problems, so the stock RW at 9.4:1 is already marginal, and going to 9.5:1 is going 'beyond reliable' unless he's doing some very clever mixture and ignition manipulation to keep the combustion in the safe operating area. Such manipulation (Knock sensing, for example) reduces the power available.
Is anything happening out there? Nobody is posting..... I had an electric water pump failure last month and am waiting for the pump to come back from Stewart Warner. Good news they covered under warranty. Whats going on out there?
Well got back from oshkosh. Finished second. Nathan with his excellent ship took first by a 1/4 point. All in all what a great time. I don't think I have ever seen Mark Peterson so relaxed. They had lots of flying and motorcycle riding. The night air show was great.