Speed,Combat,Scale,Racing > Carrier
OS MAX .65 VR DF engine work for class II
Dennis Holler:
I don't always do the brightest things, but looking hard at this little beast for a class II carrier build. It's one of there ducted fan engine's.
Thinking for a Mauler or Guardian. Not sure if these can really throttle down very well though.
Paul Smith:
That looks like a real brute power engine.
The only way to find out about the idle is bench running.
You might need an exhaust restrictor valve or a muffler or a pipe.
Dennis Holler:
Looks like the specs are somewhere betweeen 2.7 to 3 ish bhp up around 20-22,000 rpm on the ducted fan. I was looking around trying to find any discussions on guys using these DF engine's with normal props and found some suggestions of 10X8 & 10x10 props on some RC stuff.... around 20 oz....
david smith:
I have not used the 65 version but i do have a 40 and 46 version and they are strong engines. I would suggest some sort of pressure like crankcase(which will take some work to get working right) or exhaust/muffler pressure(way easier). It doesn't have to be complicated some sort of slip on tube that will build some back pressure with a fitting on it.
I would just try it first on a bench to see what it runs like. The other potential issue is that it is probable set up to run on a pipe so it might not be very happy with open exhaust. The DF engines that I have have been retimed (not by me) to run open exhaust and high nitro. They are not very happy with anything less than 50% usually run 65-70.
I doubt that you will see 20000 rpm with it but would probably run ok on a 10-8 or 10-7. I think that the 10-10 would be too much for it.
Dennis Holler:
Yeah I am realizing I will have some choices to make. TJ mentioned choosing between piped and low nitro versus open and lots of nitro,which it sounds like you are in the open and high nitro camp. Once the little hooligan arrives I may pake a post in the engine set up section once i try and digest the rules and come up with a plan lol. Plus I get the blade tip speed thing as well so will keep that in mind.
How do you like your 40/46 versions? How long a life do you see and what problems if any doyou need to keep an eye out for using them for carrier?
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