CA MODELS 34% EXTRA
09-22-2005, 06:11 AM
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CA MODELS 34% EXTRA
Here's some pics of the first Columbo Anderson 34% Extra to fly in Australia, these planes are awsome. 3W 106 QS for power, Hitec 5955's all round
10-10-2005, 09:20 PM
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RE: CA MODELS 34% EXTRA
Budgetdude,
If you want unlimited performance from this model I think the 100 is the way to go. If you wanted to have a really nice model based around the 80cc motor I would be looking toward the 31% CA Extra.
If you want unlimited performance from this model I think the 100 is the way to go. If you wanted to have a really nice model based around the 80cc motor I would be looking toward the 31% CA Extra.
10-11-2005, 01:55 AM
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RE: CA MODELS 34% EXTRA
These pics are a bit clearer. Note the 1 degree exactly of upthrust in the model with side torque roll pick.
Entering the world of vertically trimming a aerobatic model, so you go up very high idle it, dive strait down and swap directions 180 degrees a few times on the way down to see if it drops strait down (means no trimmed lift in airframe without thrust and cg mucking up trim) then you pull strait up and put the motor in position where it goes strait up. Somewhere usually between 0 degrees and 1 degree up to wing and stab incidence which are hopefully 0 degrees to each other. on the flats the model if cg is in right spot does drop slightly towards nose but equally from inverted to upright hence slight back stick is required for level flight (which is good cause you get to choose when you want lift which is none in verticles and which way you want it upside down or upright equally). In more advanced schedules where you spend most of time flying vertically and upside down, its silly to trim only for the small percentage of upright horizontal flight.
It is possible to have the cg far back enough to be like an autopilot for you by tipping the angle of attack of the whole model so it flys on its own with no back stick. It also works the same inverted as for upright. In the verticles it doesn't affect anything lateral in the trim for cg as we know it doesn't exist in verticle flight. But the bad trade of is the moments feel short in pitch and yaw so plane feels snakey.
Best thing about trimming with zero lift in airframe it usually needs to be only set once if its correctly done. You can fly with down trust but you need lift in airframe to counter it. This ratio can change with different airspeeds and air dencitys hence the requirement to re-trim all the time to reset the balance. Also with lift in the airframe you need other fixes due to the loaded circumstance like positive differential. Please note this is for a centerhinged aileron not a top hinged aileron which will need negative differential even if zero trimmed..
Down thrust thoughts are for your high wing model like ur trainer when the wing drag and weight is above the motor (also trainers have lifting semi-symmetrical wings with angle of attack that need downthrust to stop loading up the stab with down elevator). I have down thrust in my hooning classic trainer for sure. Most of us begun our modelling experience with a trainer that does need down thrust but its funny how many forget to ween of this thought when going to low or mid models with symmetrical wings n stabs that are set up 0 incidence.
TD
Entering the world of vertically trimming a aerobatic model, so you go up very high idle it, dive strait down and swap directions 180 degrees a few times on the way down to see if it drops strait down (means no trimmed lift in airframe without thrust and cg mucking up trim) then you pull strait up and put the motor in position where it goes strait up. Somewhere usually between 0 degrees and 1 degree up to wing and stab incidence which are hopefully 0 degrees to each other. on the flats the model if cg is in right spot does drop slightly towards nose but equally from inverted to upright hence slight back stick is required for level flight (which is good cause you get to choose when you want lift which is none in verticles and which way you want it upside down or upright equally). In more advanced schedules where you spend most of time flying vertically and upside down, its silly to trim only for the small percentage of upright horizontal flight.
It is possible to have the cg far back enough to be like an autopilot for you by tipping the angle of attack of the whole model so it flys on its own with no back stick. It also works the same inverted as for upright. In the verticles it doesn't affect anything lateral in the trim for cg as we know it doesn't exist in verticle flight. But the bad trade of is the moments feel short in pitch and yaw so plane feels snakey.
Best thing about trimming with zero lift in airframe it usually needs to be only set once if its correctly done. You can fly with down trust but you need lift in airframe to counter it. This ratio can change with different airspeeds and air dencitys hence the requirement to re-trim all the time to reset the balance. Also with lift in the airframe you need other fixes due to the loaded circumstance like positive differential. Please note this is for a centerhinged aileron not a top hinged aileron which will need negative differential even if zero trimmed..
Down thrust thoughts are for your high wing model like ur trainer when the wing drag and weight is above the motor (also trainers have lifting semi-symmetrical wings with angle of attack that need downthrust to stop loading up the stab with down elevator). I have down thrust in my hooning classic trainer for sure. Most of us begun our modelling experience with a trainer that does need down thrust but its funny how many forget to ween of this thought when going to low or mid models with symmetrical wings n stabs that are set up 0 incidence.
TD
10-17-2005, 09:24 PM
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RE: CA MODELS 34% EXTRA
Hey hobby man I have decided on a ca 31%. I was just wondering how the hinging went for you, it looks different with the sigle beveled edges.
10-20-2005, 05:39 AM
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RE: CA MODELS 34% EXTRA
Budgetdude,
The control surfaces on the 34% have double bevels, I am currently building a 27% that is top hinged, just use Hayes hinges with good quality epoxy and you won't have a problem. I think the top hinged models may require a bit of differential to get them to roll correctly. If you have chosen to build a kit it is easy to double bevel the surfaces.
Regards
The Hobbyman.
The control surfaces on the 34% have double bevels, I am currently building a 27% that is top hinged, just use Hayes hinges with good quality epoxy and you won't have a problem. I think the top hinged models may require a bit of differential to get them to roll correctly. If you have chosen to build a kit it is easy to double bevel the surfaces.
Regards
The Hobbyman.
10-20-2005, 07:01 AM
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RE: CA MODELS 34% EXTRA
Budgetdude-
I wouldn't be so quick to rule out the ZDZ Super 80 as an alternative for this plane. I haven't seen one yet but have been told by the distributor with confirmation from Dick Hanson who has been running one of these that there is a distinctive increase in power over the "old" ZDZ 80.
If you are trying to save some money (and from your profile name, it sounds like you might <VBG>) I would talk to your ZDZ distributor before coming to conclusion (I didn't check where you were located- RC Showcase if you are in the States).
I believe that the larger Extra will just fly so much better overall. My personal experience is a clear increase in overall performance when going to a 100"+ plane.
Dave Michael
SP: ZDZ/RC Showcase
I wouldn't be so quick to rule out the ZDZ Super 80 as an alternative for this plane. I haven't seen one yet but have been told by the distributor with confirmation from Dick Hanson who has been running one of these that there is a distinctive increase in power over the "old" ZDZ 80.
If you are trying to save some money (and from your profile name, it sounds like you might <VBG>) I would talk to your ZDZ distributor before coming to conclusion (I didn't check where you were located- RC Showcase if you are in the States).
I believe that the larger Extra will just fly so much better overall. My personal experience is a clear increase in overall performance when going to a 100"+ plane.
Dave Michael
SP: ZDZ/RC Showcase
