Hyper Viper engines

LAST EDITED ON May-20-04 AT 02:49 PM (CDT)
 
There I was, looking a site where they offered Cox engines for sale. The Black Widow was about $40, the Texaco endurance version, slightly less, and the easy start, or whatever it is they put in the Viper less than $15.

What's the difference? Would the stock Texaco or the Black Widow engines provide better performance, or is the one that comes with the plane sufficient? How should you modify any or all to mount in the plane and provide reliability and/or better performance? Thanks.

LAST EDITED ON May-20-04 AT 03:07 PM (CDT)
 
I'm not sure what site you are looking at, but my guess is the reason that the "Sure Starts" are so cheap is that they are being pulled off returned RTF Cox Planes. I thought that the Sure Start and Black Widow were functionally (except for the BW tank) the same. The Texaco is made for endurance contests, and so probably can never run as fast as the BW or SStart (I assume the porting is different, but I am really not sure).

The BW and Texaco are not offered in the RTF planes (AFAIK), so Cox gets a pretty penny for them. When you realize that you can buy the Hyper Viper from Tower for $42 +shipping, then you reallize that they are throwing the plane in for almost free!

As far as what to do, do a site search on the Hyper Viper (or on "Designman" aka Larry Renger for the "hop ups".

Killer bees.
That is what you need I have 1 new one in box .049. Date of mfg. MAY 30TH 1995. Full balanced and the one to use. Larry Renger said it is one of the good ones. $75.00 includes postage.

Carl,

What site were you looking at???

LAST EDITED ON May-21-04 AT 10:05 AM (CDT)
 
Tim:
Lone Star Balsa---They sell LOTS of stuff besides wood!

Here's one of the conversations about the HV/KB. Designman (Larry Renger) can answer all your ?? about the things if it isn't clear from any of the posts (and there were quite a few). I lucked into a NIB Killer Bee on the 'bay during all this and put in into my HV. I need to whip up some balloon tanks and give it a go, but the weather has been pretty stinky up this way. Do a search on Hyper Viper and you'll find it all.

http://www.clstunt.com/htdocs/dcforum/DCForumID1/8449.html

I used one of the pre Revlite Norvels with a Texas Timer backplate mount on my first one. The second one has a VA Mk1 being mounted to it.
I'm not going to bash C*X here but I feel that there are newer motors with more to offer.
The pre Revlite Norvel is to be preferred over the current version, not because it's better but with the smaller fins it really does go in quite well without a lot of 'buggering' to the model.
As Larry will attest to the key is RPM and these are capable of ever 20K. I use backplate pressure, my own with a 90* radius to it to bring it up beyond the backplate. Pressure hole is .003 done by blackning the wire and then soldering the brass tude shut around it and then pulling the blackend wire out upon cooling.
The Va is still in progress.
Thanks for the tips Larry.
Dennis