jetpack

My Feedback: (1)

Has anyone found anything that works for a Cox impeller lately? Seems theres a bunch of new Speed 400 types out now.

subarubrat

My Feedback: (1)

It isn't cox but, kamdax makes a fan unit with the norvel 061 that is very light weight and delivers lots of thrust. It also has a great idle and throttle response. If you want to fly 1/2a ducted fan that is the way to go. I love the early attempts at 1/2a DF, my favorite model I have in my collection is a Midwest Skyhawk with a RK049. But I would never try to fly that one, too little power and lots of reliability problems. I have a second one with the Kamdax unit and it flys like a .60 or .90 sized DF, just smaller.

vicman

My Feedback: (10)

I have been looking for a model to mount my Kamdax unit it. Can you post a pic of yours and maybe some more info please?

jetpack

My Feedback: (1)

The Kadmax is a good unit, I've read alot about it. I was just wondering because I have plans for the older Berkeley Models ducted fan kits and wanted to stay with the original design build up of them, and instead of using the stamped aluminum impeller, go with something a little more "dependable" and "safe".

KidEpoxy

any way to use a snipped cox 5x3 3blade or the little 020 3blade?
... maybe stack them on a long screw? Play with the degrees of advance between them for least interference

any of this been tried (ok, everything has been tried, I mean recently)

gcb

Problem as I understand it is that air spillage between the impellor (or prop) and the shroud decreases efficiency...the larger the gap, the larger the loss. You would be much better off purchasing a fan unit, IMHO.

George

subarubrat

My Feedback: (1)

True, but he could wrap a VERY thin sheet of ply around into a duct and fuelproof it for a nice duct that will match the props.

KidEpoxy

heck, one could put a 1/4" shim between the two cutdown 3blades on the long propscrew, and place a stator in the duct,

make a 2stage blower: propeller-stator-propeller

ok, just crazy talk, but it would be cool to show folks even if it didnt make any power

Jim Wilkinson

My Feedback: (6)

where can you buy teh Kamdax fans, do you have a web site,
I scratched built a HE-162 back about 76 and think I used the Kress fan, it flew but not a lot of performace.
thanks
JIM

subarubrat

My Feedback: (1)

Tower DID have them but no more. I have seen them on ebay. I am not sure who is importing Kamdax now. Stuffwelike was doing it but I haven't checked in a while.