Well the few times I've flown it with the cj's watch out for the plane to nose over. Not enough forward rake in the gear. Sierra's 100 degrees makes it much easier to get up to speed. As for the rudder I don't notice any more than my other planes. You might with the gear being closer though. I chickened out on the scale wing. I didn't have enough time before I go to AF boot camp. Maybe they'll let me fly the UAV's

That sure is a nice looking field you have there! Your up a little late Nosedive !

OK, so I think my Magnum 180AR might be a little overkill. I rebuilt a Saito 120S a year ago, but never fired it up. I would like to think the Saito will fly it with reasonable authority. The Magnum probably will fly it like Dago Red on nitro. (sigh!) looks like a 4 stroke after all.
So far I have read about everything from a 91 two stroke to a 135 moki turning the prop.
So now some of you have had some time to fly with Luke's mods.... what engines seem to work best?

CorsairCrazy

corsaircrazy, The 120 would be fine I am sure with plenty of authority but I always like power. The centerline tank does add a lot of drag. I am using a Saito 150 with most of Lukes mods including the shorter wing. I can say it likes speed with the shorter wing and tank.

Randy

I just got my CMC Hellcat and have started reading through the thread- still a long way to go. I noticed that Dion used to make parts for this kit but he doesn't accept PM's and his website indicates he isn't selling there anymore. Anyone know if parts are still available anywhere?

Thanks

Bart

Bart,

He pops up once in a while, last time he did he made and sold more parts. That's about all I can tell you. He goes by a few different names. Luke, Dion, Bentmetal.

bigbird

Hey, bigbird
Long time - not hear! Have you finished your Cat yet? Has she been maidened yet? Let us know.
thevirginian

Hey theVirginian,

Naw, still a long way from finished, I'm still plunking along tho'. Hows your Cat flying, still like it?

I've been a little sidetracked by ripping the gear out of my Modeltech P-47. A dead stick slightly hard landing broke both the 615s I had in it. Didn't hurt anything else though.

bigbird

Bigbird;
I am having the same problems with my 615's. No matter how smooth I land her, those scissor arms bend. I am thinking to replace them with something stronger. Other than that the Cat flies great.

Do you have any canopies for the 120 size CMP Hellcat? I am flying the Fly Models version of this bird and damaged my canopy recently. email is [email protected]. Thanks!

I just test flew my CMP Hellcat today. It flies ok. I did have trouble with the fuel draining into the engine after I filled it. I had to put forsips on the fuel line and take it off just before starting. I have an inverted Saito 120 with the tank installed as per the instructions. The center of the tank is much higher than the carb. In level fight, the engine was rich. Roll it inverted, the engine would lean out. Roll back upright and it's back to being very rich. Has anyone else have this problem??

Wayne

Hi Wayne,

I have the Fly Models version with a Magnum 120 inverted. I could not use the fuel tank supplied because it interfered with the wing saddle. Not sure if the CMP one is the same. I thought about moving the tank higher in the fuse but was concered about having a problem like you describe. I went with a smaller tank. I think it is a 14 oz Dubro square tank. I have 4 flights on mine and don't have any fuel problems. I am running a 14X7 three blade prop. I took about 3 degrees of downthrust out of the engine mount because it wants to nose over on the takeoff run when you give it throttle. I haven't flow it since I took the downthrust out. Hope that helps!

The Fly Models and the CMP must be different as I didn't have any clearance problems putting the fuel tank in the postiion shown in the instructions.

Anybody else??

Hey Wayne,
Your Hellcat looked real nice this weekend.. good job
I havn't had problems with any saito inverted.. strange
I had the same problem with a OS 91 two stroke once...
Someone one on RCU told me to mount a fuel valve down low on my cowl way below the carb
run the fuel line from tank down to it then back up to the carb ....
it worked.. kind of a lame fix but it did the job

get her ready for wings of victory
talk soon
Ronnie

Exactly. The problem is the flaps on the CMP Hellcat are tiny and don't add very much drag. I too find the plane a little on the "floaty" side. Instead of sinking down onto the runway, she tends to float forever. Bigger flaps would alleviate or eliminate that problem.

Flaps provide lift and drag.

Wikipedia.org describes this better than I can:

Flaps are hinged surfaces on the trailing or leading edge of the wings of a fixed-wing aircraft which, when deployed, change the coefficient of lift and drag of a wing.

Lift is increased by:
* increasing the camber of the wing.
* increasing the size of the effective lifting surface by increasing the wetted area.

Drag is increased by:
* increasing the wetted area of the wing, resulting in more skin friction drag.
* increasing the induced drag of the wing.

Flaps are usually fully extended while landing to allow the aircraft to fly more slowly (by increasing the lift generated by the wings at slow speeds) and to steepen the approach to the landing site. Depending on the aircraft type, configuration and method of takeoff (e.g., short field, soft field, normal, etc.), flaps are often partially extended for take-off to give the aircraft more lift when trying to leave the ground.

Hi Ron,

Putting a valve in the fuel line maybe would fix the fuel gravity feeding into the engine, but it won't help the problem of it leaning out when you go inverted. I can't believe anybody hasn't run into this before.

BTW, your recover of your Hanger 9 P-51 was awesome!! Seeing it and Donnie's FW-190 flying in formation was cool.

I am using a Saito 150 in mine which had some of the same problems on fuel. I just installed a Perry pump which took care of all my issues including fuel draining into the carb do to being lower.

Randy

I don't run Saito's, though I just received my first that I will be installing, but with all of my unpumped 4 strokers ( Mostly O.S.'s) , as long as the fuel tank mid line is not too far from the carb spray line, the plane doesn't care if it is inverted or not.

I tend to run most of my engines inverted as well, and the only minor problem tends to be with a slightly tighter tuning window, and a tendancy to siphon once the fuel level is high.

Thanks Wayne...
The Perry Pump sound like a good idea..
I have one new in the box if you want wayne... I owe you for the facet switch plate
let me know
I'll be out there on sunday again

Ron

I have a Perry pump already. I was thinking about putting it on and trying it out.

I'll fly it Friday and see if it helps.

Nose dive got a few flights on her now and he says there is absolutely nothing to complain about on this plane. It really flies like a dream. Although he doesn't find it to be a "floater" at all. He says it is very stable on approach and lands very easily he had a little issue with slop in the gear but he thinks he has taken care of it. This last pic is of the flying gang. Today is our last day with Nosedive as he is heading to the Airforce to be a Pararescue. We have had a great summer of building planes and flying till the sun has set. We will see Nosedive in one year and then its starts all over again. I have one year to get my Hellcat in the air, and be ready for another summer. Take Care Capt. Winters

That is one nice looking Hellcat [sm=thumbup.gif][sm=thumbup.gif][sm=thumbup.gif]

Good evening,

I was wondering if anyone has thought about making a wing that folds like on the full scale? I would not want to fly on that wing, but I was just sitting around thinking about trying to do one as a static display wing. I am having trouble visualizing the type of hinge needed. I have looked through my aircraft books but have not been able to find a very good picture of it.
Anyways it was just a thought that crossed through my little brain.

BFD04-
Get a plastic model with folding wings then just mimic what the manufacturer did.