My Bellanca super Viking had one instrument to the intake manifold in for emergency only. Full throttle I had almost no vacuum. Only drove my turn and bank. Not enough constant vacuum on your intake. Most airplanes with a full set of instruments requires 5 inches minimum.
Sent from my iPhone > On Jan 25, 2016, at 10:41 AM, Dave Acklam via KRnet <krnet at list.krnet.org> > wrote: > > Use 12v vac pump?? > > Manifold pressure isn't a constant enough source.... > On Jan 25, 2016 4:35 AM, "S via KRnet" <krnet at list.krnet.org> wrote: > >>> >>> It was a very long time ago. The engine was a Type 1 VW, and the carb >> was >>> probably a POSA. If there was any mixture control, it had to be manual. >> Thank you Dan ! >> I got a full set of vaccum instruments from a very friendly aircraft >> mechanic and I am exploring the best way to supply them, preferably without >> the use of draggy and icing-prone external venturi. >> I may try to use some sort of combined manifold vacuum/exhaust venturi to >> create enough vacuum in all flight conditions. >> >> Stefan >> s_sbal "at" hotmail.com >> >> _______________________________________________ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
