Webra speed .61F racing abc blackhead
10-08-2014, 07:29 AM
#1
Senior Member
Thread Starter
Webra speed .61F racing abc blackhead
Iam starting runing in this old but never used engine and ihave couple of questions?
Engine. Webra speed .61F racing abc blackhead rear exhaust with dynamix carb.
Pipe, old webra never used
Runing in fuel 20% castor 10% nitro. Best flying fuel?
Prop 12x6 apc ?
What are all the entries after the name indicate? Is this some special version?
Is that engine high reving or long stroke?
What is best propeller and rev range for new classic stunt curare?
Engine. Webra speed .61F racing abc blackhead rear exhaust with dynamix carb.
Pipe, old webra never used
Runing in fuel 20% castor 10% nitro. Best flying fuel?
Prop 12x6 apc ?
What are all the entries after the name indicate? Is this some special version?
Is that engine high reving or long stroke?
What is best propeller and rev range for new classic stunt curare?
Last edited by särpet; 10-09-2014 at 09:47 AM.
10-10-2014, 09:31 AM
#2
Senior Member
Thread Starter
45minutes runing time.
China apc 12x6 13200rpm
12.10.2014 more runing in time.
fuel 13%synthetic 5%castor nitro 0%
china apc 12x6 same 13200rpm ??
china apc 11x7 14200rpm
China apc 12x6 13200rpm
12.10.2014 more runing in time.
fuel 13%synthetic 5%castor nitro 0%
china apc 12x6 same 13200rpm ??
china apc 11x7 14200rpm
Last edited by särpet; 10-11-2014 at 11:53 PM.
10-13-2014, 06:27 AM
#3
My Feedback: (1)
The engine you have is one of Webra's best! It is a short stroke Pattern type engine; the 11x7 at 14,200 sounds as if you are close to max rpm for that prop with that engine, especially with sero nitro fuel. How is the idle and transition? Have you made any adjustments to the length of the exhaust system?
The 11x7 prop is going to be better than the 12x6 for your Curare.
The 11x7 prop is going to be better than the 12x6 for your Curare.
10-13-2014, 09:46 AM
#4
Senior Member
Thread Starter
pipe is webra and just for this engine,lenght is 375mm. (picture how imeasured it.)
with 12x6 prop it needs almost full throttle when pipe come on,with 11x7 power band is longer (ihope that you understand my bad english)
its maybe possible shorten pipe a little if want maximum performance?
with os a8 plug and 10% nitro it sounds that ignition is too early and without nitro sound is better,this engine maybe very high compression?
engine idles good and transition too, it sound very strong with full throttle and my test stand almoust overturn,rear legs are almost in the air.
with 12x6 prop it needs almost full throttle when pipe come on,with 11x7 power band is longer (ihope that you understand my bad english)
its maybe possible shorten pipe a little if want maximum performance?
with os a8 plug and 10% nitro it sounds that ignition is too early and without nitro sound is better,this engine maybe very high compression?
engine idles good and transition too, it sound very strong with full throttle and my test stand almoust overturn,rear legs are almost in the air.
Last edited by särpet; 10-13-2014 at 09:58 AM.
This is a high compression engine and probably would need to be de-compressed (head shim) to run 10% nitro.
