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Good boy Nic Ugly but strong is the key ! its your bird build it like ya want ,but buid it stronger than it needs to be ! with a big powerplant like ya have on that beastie vibrations and such will probly cause things to crack and all, just keep a close eye on stuff.... you should be doing that anyway so its no real big bother.... I go over my gyro time and time again before I take it out, then go over it again just before flight, or practice as the case may be, not takeing the time to look it over real good to me is silly, heck I even look my car over real good before I get in the thing... usually walk arround it ....just checking !.... its just a good practice to get into , and its such a habit now i do it on every piece of equipment i own.... and it has proved its worth a few times, finding a 4" nail sticking in the sidewall of the tire in the car.... a cat under the tractor ontop of the pully that starts it ..... a mufler loose on the bike that showed no signs of being loose last time I rode it .... bolt was completely gone .... odd that ! ... anyway,on the gyro I have only found a few things doing that .... like one time i found 3 temporary bolts still in the gyro when they were all supposed to be replaced already.... OOPS .... that prompted a complete check of the bolts on the entire craft......took about an hour to check them all .... can't be too carefull thats fer sure !we humans ,although we try as we might to not forget things like bolts or something unfortionately still forget things, that is the biggest reason I double check myselfon the gyro to almost **** extents !..... but once I am satisified , then I know its good to go , and don't worry about it any more....but before the next trip out , i do the same thing all over again .... however there is a tennancy to disregard things.... when you are so close to the machine, you have brought it up from scraps into a proud looking flying machine , you have a tennancy to know each part extreamily well.... and this can blind you... so you need to know this and sit back and say ok go through this thing as if you never layed eyes on it before........hehehehe I did that the other day and had to stop and ask myself why the heck did I make the linkage to the rudder so darn complicated ??? which brings me to my point.... i have used it this way for ages.... about 2 years now.... it works fine , nothing wrong with it.... but it can be made simplier and less prone to brakeage,and therefore better.... You don't come up with that unless you LOOK FOR BETTER solutions... don't be blinded by your accomplishments.... there is alwayse room to prefect aomething somewhere ! just a few more coppers tossed in the ring ! C ya Bob......" Momm'a alwayse told me , Son the impossable is only a little bit Harder... and ya know I do believe She was RIGHT ! "
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Good boy Nic Ugly but strong is the key ! its your bird build it like ya want ,but buid it stronger than it needs to be ! with a big powerplant like ya have on that beastie vibrations and such will probly cause things to crack and all, just keep a close eye on stuff.... you should be doing that anyway so its no real big bother.... I go over my gyro time and time again before I take it out, then go over it again just before flight, or practice as the case may be, not takeing the time to look it over real good to me is silly, heck I even look my car over real good before I get in the thing... usually walk arround it ....just checking !.... its just a good practice to get into , and its such a habit now i do it on every piece of equipment i own.... and it has proved its worth a few times, finding a 4" nail sticking in the sidewall of the tire in the car.... a cat under the tractor ontop of the pully that starts it ..... a mufler loose on the bike that showed no signs of being loose last time I rode it .... bolt was completely gone .... odd that ! ... anyway,on the gyro I have only found a few things doing that .... like one time i found 3 temporary bolts still in the gyro when they were all supposed to be replaced already.... OOPS .... that prompted a complete check of the bolts on the entire craft......took about an hour to check them all .... can't be too carefull thats fer sure !we humans ,although we try as we might to not forget things like bolts or something unfortionately still forget things, that is the biggest reason I double check myselfon the gyro to almost **** extents !..... but once I am satisified , then I know its good to go , and don't worry about it any more....but before the next trip out , i do the same thing all over again .... however there is a tennancy to disregard things.... when you are so close to the machine, you have brought it up from scraps into a proud looking flying machine , you have a tennancy to know each part extreamily well.... and this can blind you... so you need to know this and sit back and say ok go through this thing as if you never layed eyes on it before........hehehehe I did that the other day and had to stop and ask myself why the heck did I make the linkage to the rudder so darn complicated ??? which brings me to my point.... i have used it this way for ages.... about 2 years now.... it works fine , nothing wrong with it.... but it can be made simplier and less prone to brakeage,and therefore better.... You don't come up with that unless you LOOK FOR BETTER solutions... don't be blinded by your accomplishments.... there is alwayse room to prefect aomething somewhere ! just a few more coppers tossed in the ring ! C ya Bob......" Momm'a alwayse told me , Son the impossable is only a little bit Harder... and ya know I do believe She was RIGHT ! "
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Duh,As in 'der', or a polite way to say **** I'm dumb sometimes...I'll explain after I get back fro a little soure, do, party, you know.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Duh,As in 'der', or a polite way to say **** I'm dumb sometimes...I'll explain after I get back fro a little soure, do, party, you know.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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So, here I am, back again...Chainsaw Bob has a good way of looking at things, and if you have an oversight, ask Bob..Contrast a prop spinning at 4000 RPM with a diameter of 53" to a prop doing 2000 RPM with a prop of 72" diameter, both producing aobut the same thrust, small prop = high velocity air stream, large prop = low velocity air stream, hence the difference in the radiator's cooling abilities...so, a big D'oh from me.. what about from you..?Thank you chainsaw bob..Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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So, here I am, back again...Chainsaw Bob has a good way of looking at things, and if you have an oversight, ask Bob..Contrast a prop spinning at 4000 RPM with a diameter of 53" to a prop doing 2000 RPM with a prop of 72" diameter, both producing aobut the same thrust, small prop = high velocity air stream, large prop = low velocity air stream, hence the difference in the radiator's cooling abilities...so, a big D'oh from me.. what about from you..?Thank you chainsaw bob..Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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So,I finally got a chance to rev the engine to full power today for a stress test on the radiator and cooling system, photo result after 15 mins at full power:[Oh crap, this forum runs on windows and is therefore ficked up beyond all recognition, something is going wrong that I can't post pictures... I'll sort it soon enough}well, any way, the temp did not go past 150 f = 150 -32 = 120 / 1.8 = 65 degrees celcius - bloody marvelous I reckon, and that is the return temperature from the radiator, so the engine is obviously running at about 80, perfect!AND! for your info, a flate plate stabiliser made of alloy will resonate with the air fram, fluttering on the leading edge, I'll have to add a damper to the underside to stop it from doing so.It is funny what you see when you run a machine at full power on the ground, and if you notice what happens when there are changes in wind direction when you are running it up and at full power.I recall when flying some time back the different vibrations in the air frame when you change direction, a little unnerving until you do it on the ground in a strong wind, revving it hard on the ground and feeling what happens with the air frame is interesting, if you know the wind is changing direction you can feel it happening in the air frame. This is good information because I'd get up to flight level Angels 0.3 and do a turn in circuit, wonder wtf is this vibration, rush back to the strip and land because I thought it was about to fall apart [paranoia in operation], when in fact, it is just a change in angle of attack of the air onto the rotors and onto the prop and the air frame, disconcerting if you don't do it on the ground first.Cheers,NickNicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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So,I finally got a chance to rev the engine to full power today for a stress test on the radiator and cooling system, photo result after 15 mins at full power:[Oh crap, this forum runs on windows and is therefore ficked up beyond all recognition, something is going wrong that I can't post pictures... I'll sort it soon enough}well, any way, the temp did not go past 150 f = 150 -32 = 120 / 1.8 = 65 degrees celcius - bloody marvelous I reckon, and that is the return temperature from the radiator, so the engine is obviously running at about 80, perfect!AND! for your info, a flate plate stabiliser made of alloy will resonate with the air fram, fluttering on the leading edge, I'll have to add a damper to the underside to stop it from doing so.It is funny what you see when you run a machine at full power on the ground, and if you notice what happens when there are changes in wind direction when you are running it up and at full power.I recall when flying some time back the different vibrations in the air frame when you change direction, a little unnerving until you do it on the ground in a strong wind, revving it hard on the ground and feeling what happens with the air frame is interesting, if you know the wind is changing direction you can feel it happening in the air frame. This is good information because I'd get up to flight level Angels 0.3 and do a turn in circuit, wonder wtf is this vibration, rush back to the strip and land because I thought it was about to fall apart [paranoia in operation], when in fact, it is just a change in angle of attack of the air onto the rotors and onto the prop and the air frame, disconcerting if you don't do it on the ground first.Cheers,NickNicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Interesting info there Nic thanks !don't think I ever experienced that ,one way or the other ! thanks for the heads up !and Congrats ! looks like your hard work has paid off ! happy flying ! C ya Bob......." Momm'a alwayse told me , Son the impossable is only a little bit Harder... and ya know I do believe She was RIGHT ! "
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Interesting info there Nic thanks !don't think I ever experienced that ,one way or the other ! thanks for the heads up !and Congrats ! looks like your hard work has paid off ! happy flying ! C ya Bob......." Momm'a alwayse told me , Son the impossable is only a little bit Harder... and ya know I do believe She was RIGHT ! "
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"15 minutes at full power"Thats heavy! I tied mine to a post years ago to test it and at full power it overheated real quick. But flying it is never a problem. In fact without a thermostat it runs way to cold. ??????MC
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"15 minutes at full power"Thats heavy! I tied mine to a post years ago to test it and at full power it overheated real quick. But flying it is never a problem. In fact without a thermostat it runs way to cold. ??????MC
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Bob,I thank you, please go and get some instructions...Mark,I'd rather try and break it on the ground.. no success in doing so this time though. Its a mixed bag doing this though, I recall an article about a NASA engineer who tested an ejection safety system to destruction - it broke on the 27th time ... could have had 26 good flights before the failure, I wonder if I might be doing the same thing? However, apart from the howling wind and noise from the machine and a visit from a few curious people it was uneventful.One thing I did try was to see if the gyro could move the car, trailer, etc with its power only, using remote throttle. For a track with a 5% gradient and with the engine running at 4000 RPM it moved off the Subaru Wagon, trailer and gyro mass, probably about 1.6 ~ 1.8 tonne, and yes, it started to accelerate, I wasn't game to crank it up to full power.. gives on the idea of running the gyro while going up the F3, at least the Merc diesel van I have - which is a hill detector, might get a leg up to speed along.What size radiator do you have, did you have a redrive, what were the prop specs, etc, etc ... do you have a photo of the rig?Look forward to your response.Cheers,Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Bob,I thank you, please go and get some instructions...Mark,I'd rather try and break it on the ground.. no success in doing so this time though. Its a mixed bag doing this though, I recall an article about a NASA engineer who tested an ejection safety system to destruction - it broke on the 27th time ... could have had 26 good flights before the failure, I wonder if I might be doing the same thing? However, apart from the howling wind and noise from the machine and a visit from a few curious people it was uneventful.One thing I did try was to see if the gyro could move the car, trailer, etc with its power only, using remote throttle. For a track with a 5% gradient and with the engine running at 4000 RPM it moved off the Subaru Wagon, trailer and gyro mass, probably about 1.6 ~ 1.8 tonne, and yes, it started to accelerate, I wasn't game to crank it up to full power.. gives on the idea of running the gyro while going up the F3, at least the Merc diesel van I have - which is a hill detector, might get a leg up to speed along.What size radiator do you have, did you have a redrive, what were the prop specs, etc, etc ... do you have a photo of the rig?Look forward to your response.Cheers,Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Very pleasing to hear the static test went well !! Now for the real thing !!BrianPooncarie NSW
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