Looking at a Kobra
#76
#77
The first plane from this group I had was the kougar, that was given to me by a friend that wiped out a plane I scratched up from two crashes, great flyer, the Kougar was powered by a Enya 40 which I thought was going to be a real dog but both the plane and the engine performed admirably. I eventually wacked it and went on to assemble my sons kobra from a kit (I still have the original components) my sons plane was a copy then I built him a king Kobra which lead to the ones on my bench now. all good flying birds. come to think of IT I have the plans for all these birds and some parts.
#79
Love seeing all these classic planes. Sig has put out some great kits.
#80
Thread Starter
It`s a 3 oz. bottle of DAP with a little round fuzzy applicator on the end of a wand attached to the cap. It was thin enough so an even coat was pretty easy over the whole thing. I let it get tacky, then laid the Monokote flat on the table and then pressed the turtledeck firmly down the middle and rolled it down lttle by little left and right. It got a couple wrinkles but looks pretty good on the whole. It saved a lot of trouble trying to get a close enough shade of blue.
#83
Thread Starter
I haven`t flown it yet. Way nose heavy. donnyman said on #67 that he had to fly his sans muffler because it was too nose heavy. I don`t want to do that, so will have to put some weight in the tail.
#84
your bird is looking good!
#85
Man, do I agree! The TT 36 is a terrific engine, but most of us would have all the power we could possibly want with a good 25, or a plain bearing Enya 30SS that weighs 9 oz w muffler. Even an OS 25 FP or LA would haul it pretty well if it's reasonably light. An ASP 21 is as strong as the old OS 25 FSR and weighs 8 oz w muffler. My old Irvine 25 is just under 9 oz and a very strong runner; they come up frequently on ebay in good condition which is how I got mine.
Very pretty plane, hope you enjoy it however you do it.
Very pretty plane, hope you enjoy it however you do it.
#86
Thread Starter
Thanks for the tips, guys. Yeah, Donny, the idea really doesn`t appeal to me either, despite what they always say in the instruction books. We`re supposed to get the lead OUT, right?
#87
Stickslammer, your Kobra looks great. I used an OS .35 AX on mine and had to add some tail weight. It ended up weighing 3pounds 11ounces. It flew great at that weight. No snap rolling at lower speeds unless you tried to. It had great vertical performance and would do huge loops. Dont be afraid to add a little tail weight.
#88
Thread Starter
Well, I finally got her in the air yesterday. It flew nice and I was able to do a couple rolls and loops. I didn`t keep it up very long as I didn`t want to run out of gas. The next time I tried to take her up the engine quit on climb-out. If it hadn`t been for the 2 ft. high grass there would have been some damage. I checked it out, refueled, ran it up ( held it at a good steep angle), all good. Next attempt, same thing, the tall grass saved it. Not having good luck with my glow engines this season. I`m just happy she flew around at least once and doesn`t have a scratch.
#89
Well, I finally got her in the air yesterday. It flew nice and I was able to do a couple rolls and loops. I didn`t keep it up very long as I didn`t want to run out of gas. The next time I tried to take her up the engine quit on climb-out. If it hadn`t been for the 2 ft. high grass there would have been some damage. I checked it out, refueled, ran it up ( held it at a good steep angle), all good. Next attempt, same thing, the tall grass saved it. Not having good luck with my glow engines this season. I`m just happy she flew around at least once and doesn`t have a scratch.
#90
Thread Starter
Thanks Donny,
I have been using Morgan Cool Power. I always thought the green stuff was 10%, but I just went down and looked at the gallon I just bought and the sticker says 15%. I always thought the higher percentage ran cooler. Someone told me that you should run at least 20% in cars and trucks because there was not enough airflow around the cylinder. Sounds like I need to educate myself on glow engines and fuel. I have been pretty careful about not running my engines too lean after I burned one up a long time ago.
I have been using Morgan Cool Power. I always thought the green stuff was 10%, but I just went down and looked at the gallon I just bought and the sticker says 15%. I always thought the higher percentage ran cooler. Someone told me that you should run at least 20% in cars and trucks because there was not enough airflow around the cylinder. Sounds like I need to educate myself on glow engines and fuel. I have been pretty careful about not running my engines too lean after I burned one up a long time ago.
#91
Thanks Donny,
I have been using Morgan Cool Power. I always thought the green stuff was 10%, but I just went down and looked at the gallon I just bought and the sticker says 15%. I always thought the higher percentage ran cooler. Someone told me that you should run at least 20% in cars and trucks because there was not enough airflow around the cylinder. Sounds like I need to educate myself on glow engines and fuel. I have been pretty careful about not running my engines too lean after I burned one up a long time ago.
I have been using Morgan Cool Power. I always thought the green stuff was 10%, but I just went down and looked at the gallon I just bought and the sticker says 15%. I always thought the higher percentage ran cooler. Someone told me that you should run at least 20% in cars and trucks because there was not enough airflow around the cylinder. Sounds like I need to educate myself on glow engines and fuel. I have been pretty careful about not running my engines too lean after I burned one up a long time ago.
The lower the nitro content the cooler your engine will run, most of us don't need any nitro, but it does make for easier starting in cold weather, I try not to use anything above 5% because the benefits of higher nitro is to small to give the average flyer any real benefit. the fuel you chose (morgan) is good, I used it a lot, but you gotta read the label as to the nitro and lube content not the color.
You will find a engine that has been run on high nitro fuels usually will not do well with less nitro because of the excess wear on it due to swelling of the piston and sleeve from heat friction. .................... I think you will find the engine will not quit with the lower nitro fuel............................................Ha ppy flying!
#92
Thread Starter
I went down to the LHS and bought a gallon of 10% nitro. It was the lowest they had. But so far I have flown the P-51 a half a dozen times with no more cutting out. It does tend to load up during taxi maneuvers but I`m satisfied with it just staying running for now.
#93
I went down to the LHS and bought a gallon of 10% nitro. It was the lowest they had. But so far I have flown the P-51 a half a dozen times with no more cutting out. It does tend to load up during taxi maneuvers but I`m satisfied with it just staying running for now.
Try to get the hobbyshop to get some 5% or FAI 0% fuel and mix it in the twenty to reduce it's high nitro content so the fuel isn't wasted. If the fuel is all synthetic be very careful of lean running, synthetic fuel wont lube the engine as well as castor oil based fuel at high temps because it burns up, castor wont.
#98
Thanks Stickslammer, yes the turtle deck is balsa, 1/16 sheet wetted and taped over the plastic one in the kit. Let it dry and you have a balsa turtle deck. I epoxy the tail on before covering to set 0-0 incedence with the wing..it’s not that difficult to cover .
#99
Thread Starter
Yes , it would make more sense to assemble the tail structure prior to covering so you have good strong joints with proper alignment. All the kits I`ve done call for covering first, then trimming away for glue joints, which I don`t like to do. I guess "thinking outside the box" in some cases makes for a better build.