Hello , I decided to post some of the CMP Giant scale conversion of gas over to epower for anyone who may have interest. The reason for my post besides fun lol, is that many short nose warbirds require nose weight.
At times we think of nose weight as lateral only when we can easily go vertical in placing weight when you have the luxury of a large cowl.
This model was flown with a G62 gas engine and 2& 1/2 pounds of weight on the nose.
That type of assembly and non -functional weight is fine for. Gas but a total no no for Epower.
So onto the bash ! The most difficult part of inheriting someone else’s model ( not for free lol ) is the disassembly process. You cant even start a build until you remove all the non -essential parts that are not needed for your conversion.
In addition you have to plan on your battery placement because for me that typically means in the cowl behind the motor.
Step one was to remove the gad engine mount -repair the cowl that is long gone from anyone’s website sales . The cowl had major holes to fit the G62 .
Second -add the new motor rails and build a lipobox
third -build reliable access to lipo from the cowl
4th create a remote motor start away from the giant prop .
5th -add a cockpit, power sliding canopy
6th replace, replace retract area and semi scratch build retracts that fit
7th build wheel wells, add semi scale wheels
Test CG !
Fail - still needs major weight to achieve 25% of Mac
8th move heavy 4oz flap 1/4 scale servos forward —scratch that idea - replace with high torque light weight, replace 2/25 rods with 4/40 HD and 4/40 had connections . Move flap servos ahead of CG .
Test CG
Fail -still needs weight !
Last mod -remove all three servos from tail move forward ahead or on CG in fuselage!
Add pull pull cable for rudder -add carbon pushrods for elevator, create light weight exit tubes -repurpose servos doors on stablizer .
Next up retest CG —coming this weekend !
Scale mods remaining
new exhaust -Dave Platt Zero and new front canopy
panel lines
paint /rivots/ surface details
At times we think of nose weight as lateral only when we can easily go vertical in placing weight when you have the luxury of a large cowl.
This model was flown with a G62 gas engine and 2& 1/2 pounds of weight on the nose.
That type of assembly and non -functional weight is fine for. Gas but a total no no for Epower.
So onto the bash ! The most difficult part of inheriting someone else’s model ( not for free lol ) is the disassembly process. You cant even start a build until you remove all the non -essential parts that are not needed for your conversion.
In addition you have to plan on your battery placement because for me that typically means in the cowl behind the motor.
Step one was to remove the gad engine mount -repair the cowl that is long gone from anyone’s website sales . The cowl had major holes to fit the G62 .
Second -add the new motor rails and build a lipobox
third -build reliable access to lipo from the cowl
4th create a remote motor start away from the giant prop .
5th -add a cockpit, power sliding canopy
6th replace, replace retract area and semi scratch build retracts that fit
7th build wheel wells, add semi scale wheels
Test CG !
Fail - still needs major weight to achieve 25% of Mac
8th move heavy 4oz flap 1/4 scale servos forward —scratch that idea - replace with high torque light weight, replace 2/25 rods with 4/40 HD and 4/40 had connections . Move flap servos ahead of CG .
Test CG
Fail -still needs weight !
Last mod -remove all three servos from tail move forward ahead or on CG in fuselage!
Add pull pull cable for rudder -add carbon pushrods for elevator, create light weight exit tubes -repurpose servos doors on stablizer .
Next up retest CG —coming this weekend !
Scale mods remaining
new exhaust -Dave Platt Zero and new front canopy
panel lines
paint /rivots/ surface details
Attached Files
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