JHH-A7 with the new Kingtech K45
06-08-2015, 07:55 AM
#26
I flew one of these a few years back with a 12S electric setup and it flew quite nicely as long as I kept the speed up. I think part of the control issues may be the high wing loading versus what the plane was originally designed for. When my fan came loose (my own fault) the plane literally descended like a rock and I couldn't even flare enough to avoid major damage landing in the grass. I think my weight was at least 15+ lbs.
I sure would like to see this A-7 or preferably one larger be successful. This particular camo scheme is close to my heart since I flew the full scale (same tail number) years ago in Vietnam.
Craig
I sure would like to see this A-7 or preferably one larger be successful. This particular camo scheme is close to my heart since I flew the full scale (same tail number) years ago in Vietnam.
Craig
Last edited by CraigG; 06-08-2015 at 07:59 AM.
06-08-2015, 08:56 AM
#27
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John,
Yeah, we are a little spoiled out here in SoCal I hate to say. Usually calm in the mornings with winds in the afternoon, but not usually too unmanageable.
Craig,
That was a bummer for sure, I still remember hearing about it.
I hear you on the wing loading, the airplane does do better (especially landing) at lighter weights for sure. If we were to do this airplane again from the ground up, the EDF version would have been purposely designed around a high power 90mm fan...at least that's the direction I would push for. That's what I'm flying mine with now and it's about perfect. It's a lighter installation (my VA-72 weight is about 14.5 lb with 5800 mah 12s packs and brakes) and the flight times are really good. At the time we designed the ARF, the 90mm fans weren't pushing the power that they are now and so it wouldn't have pushed the airplane around as well in comparison. Live and learn I suppose.
Unfortunately, I don't expect that these will ever be available again.
Yeah, we are a little spoiled out here in SoCal I hate to say. Usually calm in the mornings with winds in the afternoon, but not usually too unmanageable.
Craig,
That was a bummer for sure, I still remember hearing about it.
I hear you on the wing loading, the airplane does do better (especially landing) at lighter weights for sure. If we were to do this airplane again from the ground up, the EDF version would have been purposely designed around a high power 90mm fan...at least that's the direction I would push for. That's what I'm flying mine with now and it's about perfect. It's a lighter installation (my VA-72 weight is about 14.5 lb with 5800 mah 12s packs and brakes) and the flight times are really good. At the time we designed the ARF, the 90mm fans weren't pushing the power that they are now and so it wouldn't have pushed the airplane around as well in comparison. Live and learn I suppose.Unfortunately, I don't expect that these will ever be available again.
06-08-2015, 10:45 AM
#28
Join Date: Jul 2006
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Chris
If you want any I think Dave Wilde still has some untouched A7 kits.
http://www.colchestera1models.co.uk/...product_id=454
John
If you want any I think Dave Wilde still has some untouched A7 kits.
http://www.colchestera1models.co.uk/...product_id=454
John
06-09-2015, 06:04 PM
#35
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Hey Kris, nice effort! I think you are going to like it.
For "scale points".......or just to impress old A-7 pilots
.....the inside of the tail cone area was painted in "chromate yellow", kind of a mustard yellow.
- Mike
For "scale points".......or just to impress old A-7 pilots
.....the inside of the tail cone area was painted in "chromate yellow", kind of a mustard yellow.- Mike
06-17-2015, 11:50 PM
#38
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Might be a good idea to set the timer at 6 mins, land and see what you have left in the tank.
John
Last edited by Jgwright; 06-17-2015 at 11:52 PM.
06-18-2015, 03:59 AM
#39
40 Oz should be more than enough. I am getting 8 minute flights with the K45 on the glider using plenty of throttle with 2 20 oz dubro tanks. I do not use any UAT as with a pleated paper filter they are not necessary.
Might be a good idea to set the timer at 6 mins, land and see what you have left in the tank.
John
Might be a good idea to set the timer at 6 mins, land and see what you have left in the tank.
John
06-18-2015, 06:06 AM
#40
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Gun,
Looks like you're getting there! 40 oz I would think would be plenty. I can only gauge from the MW-44 gold I flew mine with, but I had 36 oz total and had plenty of flight time.
Looks like you're getting there! 40 oz I would think would be plenty. I can only gauge from the MW-44 gold I flew mine with, but I had 36 oz total and had plenty of flight time.
06-18-2015, 09:39 AM
#43
I dont have a scale here at work. Will try and remember to bring one in or weigh it when I bring it back home. One step closer now. Tested the fuel system and took the aircraft out and did some engine runs. Simply learn RC and prime the engine and its done. Engine ran great love the new K45.
I can tell you for a plane this size feels kind of heavy to me. Should be fine though.
Also going to use the new Xicoy spektrum telemetry on this bird. Still need to install a gyro also when I get some time.
I can tell you for a plane this size feels kind of heavy to me. Should be fine though.
Also going to use the new Xicoy spektrum telemetry on this bird. Still need to install a gyro also when I get some time.
06-23-2015, 09:25 PM
#50
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I have the pipe on order along with some other odds and ends. I will use regular dubro fuel tanks. The plane already has electric gear from down and locked. Will install a spektrum receiver along with a eagle tree gyro.
