World Models GS Spit Conversion - Flight Test
07-15-2007 | 07:38 AM
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From: Ankeny, IA
World Models GS Spit Conversion - Flight Test
Just thought I'd pass on some data from my recent test flight of my World Models giant scale Spitfire.
Motor: Axi 5330-18
Controller: Jeti - 90 amp
Battery: 10s 5000 mah (two 5s 5000's in series)
Prop: APC-E 17x12
Static RPM: 7500
Static Amp Draw: 63.5 amps (67.5 amps without spinner)
(Pretty similar to what MotoCalc generated, btw)
Flight test:
Plane took off at slightly over 1/2 throttle - pitch sensitive (combination slightly rearward CG and too much elevator throw), but in all other regimes a great performer. As it was a test flight, mainly flew at just less than half throttle for the five minute flight. Did go to full throttle for about, oh, five seconds and it scared the **** outta me, it accelerated like a rocket (it was already moving pretty good clip at half throttle), decided that with pitch sensitve, half throttle was a bit more prudent
. Very much a floater on landing (flaps help).
I'll update this as I get more flights if folks are interested.
Take care.
Larry
Motor: Axi 5330-18
Controller: Jeti - 90 amp
Battery: 10s 5000 mah (two 5s 5000's in series)
Prop: APC-E 17x12
Static RPM: 7500
Static Amp Draw: 63.5 amps (67.5 amps without spinner)
(Pretty similar to what MotoCalc generated, btw)
Flight test:
Plane took off at slightly over 1/2 throttle - pitch sensitive (combination slightly rearward CG and too much elevator throw), but in all other regimes a great performer. As it was a test flight, mainly flew at just less than half throttle for the five minute flight. Did go to full throttle for about, oh, five seconds and it scared the **** outta me, it accelerated like a rocket (it was already moving pretty good clip at half throttle), decided that with pitch sensitve, half throttle was a bit more prudent
. Very much a floater on landing (flaps help). I'll update this as I get more flights if folks are interested.
Take care.
Larry
07-16-2007 | 09:04 AM
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From: Anaheim,
CA
RE: World Models GS Spit Conversion - Flight Test
Larry,
Please post some more info.
I recently completed the Cermark Spitfire with the similar motor/controller/battery combination. There is an electric buld thread on RCgroups, under the name of scalefan. I think it would be neat if you detailed the build, the quality, the problems if any, and some more flights. Hopefully, you will get the trim dialed in.
Al
Please post some more info.
I recently completed the Cermark Spitfire with the similar motor/controller/battery combination. There is an electric buld thread on RCgroups, under the name of scalefan. I think it would be neat if you detailed the build, the quality, the problems if any, and some more flights. Hopefully, you will get the trim dialed in.
Al
07-23-2007 | 06:31 PM
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From: Ankeny, IA
RE: World Models GS Spit Conversion - Flight Test
Added about 1 lb chunk of lead to motor mount, adjusted control throws, set expo prior to second flight. Fixed weak gear mount - rough landing broke mount loose. End result: wonderful flyer - pitch sensitivity gone (I know, well duh) - I'll post the final cg I found when I unbury my balancing sling from the pile. Put in two 5 - 6 min flights - very neutral at all speeds, big loops, nice axial rolls and yes, fast. Very much a floater on landing (for a warbird), holds in ground effect nicely with no tendency to tip stall.
Thanks,
Larry
Thanks,
Larry
06-14-2009 | 12:37 PM
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Senior Member
RE: World Models GS Spit Conversion - Flight Test
<span style="font-size: larger;"><span style="font-family: Comic Sans MS;">Aircraftfreak ... its the 80" version, this plane on GP is still very tail heavy, I believe that they had to add over 1 lb of lead when in GP.</span></span>
