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New Hangar 9 30cc Spitfire! Build Thread, i got mine!

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New Hangar 9 30cc Spitfire! Build Thread, i got mine!

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Old 09-23-2019, 06:44 AM
  #301  
jagdpanther9
 
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+1 on the rearward C/G. mine is electric and upon landing just loved to go on its nose with the forward recommended C/G. i cant remember the exact C/G measurement for mine but it was at the rearward limits and the model is still well mannered in flight and keeps the tail down much better when landing.
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Old 09-23-2019, 07:19 AM
  #302  
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I balance my planes at 28 to 32% of the chord, measured at the fuselage. Did any of you work up the figures to calculate what percentage you used?
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Old 09-24-2019, 06:23 PM
  #303  
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I just made about 800grams of dead weight on nose to achieve a rearward CG within the range given in the manual. Total flying weight is to measure later.
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Old 09-25-2019, 08:01 PM
  #304  
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Originally Posted by jeff4steel View Post
I just made about 800grams of dead weight on nose to achieve a rearward CG within the range given in the manual. Total flying weight is to measure later.
Jeff, post a few photos of your FG40 installation, it would be interesting to see what you did. I have the FG36 installed in my H9 Spitfire and it's an awesome combination, it looks and sounds great, I changed the CG to 130mm and it flies much better at 130mm than the CG that is called for in the assembly manual.

Roger
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Old 09-29-2019, 07:09 PM
  #305  
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Originally Posted by ForcesR View Post
Jeff, post a few photos of your FG40 installation, it would be interesting to see what you did. I have the FG36 installed in my H9 Spitfire and it's an awesome combination, it looks and sounds great, I changed the CG to 130mm and it flies much better at 130mm than the CG that is called for in the assembly manual.

Roger
I would like to do so but I didn't post anything before and it's not allowed for me to paste photos until I write somewhere for 10 times here... I will try to make it though
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Old 10-09-2019, 08:20 AM
  #306  
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Default some photos showing the dead weight and Saito FG40 in the cowl









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Old 10-09-2019, 03:30 PM
  #307  
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Jeff, what material are you using to hide the gap between the cowl and the removable hatch? I'm wondering why you had to use so much dead weight to meet your CG when you have the FG40 installed using the stock Saito engine mount? I have the FG36 installed in my H9 Spitfire which is basically the same as the FG40 and I only required 382.7 grams (13.5oz) to meet a CG of 130mm?
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Old 10-09-2019, 09:18 PM
  #308  
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Originally Posted by ForcesR View Post
Jeff, what material are you using to hide the gap between the cowl and the removable hatch? I'm wondering why you had to use so much dead weight to meet your CG when you have the FG40 installed using the stock Saito engine mount? I have the FG36 installed in my H9 Spitfire which is basically the same as the FG40 and I only required 382.7 grams (13.5oz) to meet a CG of 130mm?
ForcesR, there is no gap in mine. I coated 2 layers of thin fiber glass cloth on the entire firewall block before installing the engine mount. Thickness of these two layers could be ignored. I used stock Saito mount which has 4 mounting holes drilled by default, and there isn't any shim between the firewall and the mount. The distance between firewall and the prop back plate is about 2-3mm less than it's defined in the manual. I suppose this is why I gotta have more dead weight. Cowl top side, in this way, covers the removal hatch and the overlapped can be 2mm or even bigger.
I also fixed Rx. and a Dualsky VR Pro (to feed 6V power to Rx and servos from my 2S Lipo) close to the rear side of wing, in the fuselage. In the past whenever the distance between Rx. and CDI was less than 40cm, I could experience some disturbing in the control. This happened for maybe 3-4 times to my Evo 10CC gassier. Probably I am too much concerned and I plan to shift Rx. and accessories to the place recommended by the manual, which might help me reduce the dead weight as well. I will also try to adjust the dead weight for CG about 130mm, while I tried 125mm before.
If your Rx is put under the hatch and CDI is mounted similarly, did you have any issues in remote control?
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Old 10-09-2019, 11:26 PM
  #309  
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Jeff, looks good!
I have the FG40 as well, but in a diferent model, a Hawker Typhoon. Are you able to start the engine by hand? I am UNABLE to and have checked timing and everything...this things just totally opposed to handstarting! Its a PITA, but once its started, its a great engine, plenty of guts and sounds so much better than a garden implement engine!
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Old 10-10-2019, 09:36 AM
  #310  
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Originally Posted by cathurga View Post
Jeff, looks good!
I have the FG40 as well, but in a diferent model, a Hawker Typhoon. Are you able to start the engine by hand? I am UNABLE to and have checked timing and everything...this things just totally opposed to handstarting! Its a PITA, but once its started, its a great engine, plenty of guts and sounds so much better than a garden implement engine!
Hi, Cathurga! Unfortunately I couldn't start it manually by hand. I've tried twice and each time I tried about 20 mins. This is really sad. I heard comments from friends that Saito gas engine gives authentic sound while OS gas engine makes everything easy. I encountered a weird situation actually a few days ago. All was fine at home but after I plugged in batteries to both Rx and CDI and tried to start it by a starter in the flying field, the Rx failed. I had one temperature sensor and the RPM sensor wire from CDI both connected to Spectrum AR9030 Rx's sockets accordingly. One end of temperature sensor wiring was banded on the muffler, which showed me reading without issues before. I cannot figure out what's wrong and how the Rx. failed. Now I cannot even bind this AR9030 but its two satellites were tested to be fine. I am now waiting for an AR12310T Rx. that's just bought and on its way. Hopefully I could post some positive things after I clear all the mess.
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Old 10-10-2019, 11:06 AM
  #311  
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Jeff, my RX is located in the area under the hatch behind the fuel tank and the electronic ignition box is attached beneath the engine box. I have never had any flight control issues due to electronic signal interference. I have to use an electric starter when the engine is cold for the first start of the day. After that first start the FG36 will hand start very easily, usually on the 2nd or 3rd hand flip as long as the engine is still warm. If I allow the engine to get cold between flights then I have to use the electric starter again.

Roger
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Old 10-10-2019, 06:08 PM
  #312  
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Originally Posted by ForcesR View Post
Jeff, my RX is located in the area under the hatch behind the fuel tank and the electronic ignition box is attached beneath the engine box. I have never had any flight control issues due to electronic signal interference. I have to use an electric starter when the engine is cold for the first start of the day. After that first start the FG36 will hand start very easily, usually on the 2nd or 3rd hand flip as long as the engine is still warm. If I allow the engine to get cold between flights then I have to use the electric starter again.

Roger
Roger, Thank you very much for such a valuable reply!
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