Smilin' Jack
Well Known Member
I know that I want an IO-360 but the delima is whether fixed pitch or CS.
I know the advantages shorter take off etc but is anyone out there running a Prince prop ( a fixed prop that changes flex in cruise) Bill Durham has one on his RV6 but what about on a 7. and the main question is in regard to CG and weight.
Is going with a fixed prop going to give me headaches in a rearward CG?
I want to stay in the forward half of the acro CG if possible and still be able to take 2-190 lbs folks up. Yes I have worked some of the numbers from the CG that folks have posted and to do this with an aircraft that weighs 1100 lbs I can only carry about 20 gallons on takeoff and assume I burn some by the time I climb up to 4 or 5 thousand feet.
With a fixed prop I lose about 22 lbs of forward weight. I am not to interested in taking off from 700 foot strips and most likely will never do that however I guess if you lose an engine and have to put it down after gliding there with the lost of oil pressure the prop is going to go to low rpm is that not correct? You'd want to pull the prop control back to help with the glide on an engine failure.
I am trying to do this on a budget and not get too carried away with the whole plane. I am not interested in flying instruments but would like to have the ability to get out of weather with the instrumentation on board safely. Can I put a C/S on later or do I have to redue the cowling if I am really interested in going with a C/S
so I need to hear from folks that have a fix pitch whether injected or not really does not matter. I am going to assume with the CS it is not a CG problem but a weight problem in being able to take someone with you and do some acrobatic flying. And with a Fixed Pitch you have a more rearward CG that could really restrict you. Maybe I am being to picky about all this stuff. But my wife said 2 folks doing loops and rolls or no airplane and were too far along with the project to quit now.
What do you think I appreciate it as I am getting ready to order the wings and I think I read that correctly I have to put a deposit on the fuselage too?
I really appreciate your input and thanks for reading this longer post.
Smilin' Jack
HS done
VS done
Putting rudder together for last time.
I know the advantages shorter take off etc but is anyone out there running a Prince prop ( a fixed prop that changes flex in cruise) Bill Durham has one on his RV6 but what about on a 7. and the main question is in regard to CG and weight.
Is going with a fixed prop going to give me headaches in a rearward CG?
I want to stay in the forward half of the acro CG if possible and still be able to take 2-190 lbs folks up. Yes I have worked some of the numbers from the CG that folks have posted and to do this with an aircraft that weighs 1100 lbs I can only carry about 20 gallons on takeoff and assume I burn some by the time I climb up to 4 or 5 thousand feet.
With a fixed prop I lose about 22 lbs of forward weight. I am not to interested in taking off from 700 foot strips and most likely will never do that however I guess if you lose an engine and have to put it down after gliding there with the lost of oil pressure the prop is going to go to low rpm is that not correct? You'd want to pull the prop control back to help with the glide on an engine failure.
I am trying to do this on a budget and not get too carried away with the whole plane. I am not interested in flying instruments but would like to have the ability to get out of weather with the instrumentation on board safely. Can I put a C/S on later or do I have to redue the cowling if I am really interested in going with a C/S
so I need to hear from folks that have a fix pitch whether injected or not really does not matter. I am going to assume with the CS it is not a CG problem but a weight problem in being able to take someone with you and do some acrobatic flying. And with a Fixed Pitch you have a more rearward CG that could really restrict you. Maybe I am being to picky about all this stuff. But my wife said 2 folks doing loops and rolls or no airplane and were too far along with the project to quit now.
What do you think I appreciate it as I am getting ready to order the wings and I think I read that correctly I have to put a deposit on the fuselage too?
I really appreciate your input and thanks for reading this longer post.
Smilin' Jack
HS done
VS done
Putting rudder together for last time.
Last edited: