RE: H9-F6F Hellcat 60 ARF   
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RE: H9-F6F Hellcat 60 ARF - 3/18/2009 12:40 AM   
tom2bell



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From: aurora, CO, USA
Status: offline 		here is a beter pic of my satio 100 mounted
try puting the motor on the mount and then align
tom

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RE: H9-F6F Hellcat 60 ARF - 3/18/2009 12:46 AM   
tom2bell



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Status: offline 		I had to cut the mount screw flush so that it did not hit the tank

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RE: H9-F6F Hellcat 60 ARF - 3/18/2009 2:02 AM   
mrsand


 

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I guess I could do that but how did you secure the screw so that it would effectively hold like the others?

Steve

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RE: H9-F6F Hellcat 60 ARF - 3/18/2009 4:17 AM   
tom2bell



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Status: offline 		steve herer are some more pics I use blue lock tight on all mount hardware
you can mark where to cut the bolts with a silver sharpy
tom

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RE: H9-F6F Hellcat 60 ARF - 3/19/2009 1:55 AM   
mrsand


 

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Status: offline 		Thanks for the pictures Tom2Bell I will probally saw off the offending screw and liquid lock it

MrSand

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RE: H9-F6F Hellcat 60 ARF - 3/19/2009 2:47 AM   
tom2bell



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Status: offline 		I hope it helped good luck you will love the plane I do

tom

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 12:50 PM   
mrsand


 

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Status: offline 		Fuel Tank Height

I am starting to assemble the plane again and have mounted the saito 100 inverted at a 45 degree angle to the onboard pilots right. The diffence in height between the tank C/L and the spray bar on the carb is +- 40mm with the tank being higher... Is this going to cause a fuel flooding issue...if so what is a simple solution or should I say the best thing to do? Also could I get some advice on a exterior fueling system that is convenient?? I bought a dubro fuel valve thats mounts to the outside if the cowl but that system has to be disconnected every time the cowl is removed.. is there a better way. As always I appreciate any help or advice.. Thank you.

MrSand

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 4:55 PM   
apcud7


 

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I use a hangar 9 fuel dot to do the fueling. I first used a valve system but after one season the valve began to stick and the engine wouldn't run correctly. The guy at my hobby store said they all end up sticking after time. With the fuel dot I ran a third line from the tank, dedicated only to fueling. The tank cork should have an area for a third hole, you just need to drill it out. Then, I drilled a hole in the fuselage opposite the on/off and charging switch. That way, removing the cowling has no affect on the fueling system.

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 5:07 PM   
Wulf



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Status: offline 		Apcud7s idea is good.However if you want to use the valve locate it under the cowl ,mount to a bracket , and drill a hole in cowl to access it.Either way(I use both methods) works for me.My Great Plaines fuelers has lasted several seasons on several planes.

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 5:25 PM   
mrsand


 

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Status: offline 		Thanks Wulf and Apcud7 for your idea's

I can see the fuel tube on your plane Wulf

Do either of you see any problems with the tank C/L being 40mm higher than the spray bar on the carb?

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 5:36 PM   
apcud7


 

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Status: offline 		my tank c/l is about 25mm above the carb. Mine has run fine for a season like that, but I'm running an evo .61 two stroke

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RE: H9-F6F Hellcat 60 ARF - 4/21/2009 6:33 PM   
Wulf



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Status: offline 		I have a Saito 1.25 in my Cat and have it mounted at approx 8 O-clock.I have experienced no problems with the engines performance,runs great with this setup.I`m using using the 3 tube tank setup on this plane that apcud7 mentioned.1 to carb 2 to the muffler and 3 to fill with no#3 plugged when done filling.Overflow runs out muffler showing when tank is full.

Hope this helps you-

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RE: H9-F6F Hellcat 60 ARF - 4/22/2009 1:42 AM   
mrsand


 

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Status: offline 		Ok, Thanks Wulf I appreciate your help. I googled fuel dots/valves an there is all sorts of interesting gagets. But a third line off the main tank to a fixed position on the fuse seems the most cost efficient

MrSand

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 12:46 AM   
RedStarArmy


 

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Status: offline 		Alright, well I have just completed reading all posts here...boy that took awhile. Here is my question, hope some of you veterans can advise me.

I don't have the plane yet, but am about to purchase it from another fellow flier on this forum. This will be my second plane (flying for about a year now) I have no experience with any other engines except for my 46 evo 2 stroke, so I would like to mount another 2 stroke in this plane for now. I have pretty much narrowed down the list between the OS .61FX or the OS .75AX.

Which would work best? I don't want a 'powerhouse' of a plane as I intend to fly it scale like, but its always good to have the extra bit of power to get out of sticky situations. Which is more closely related to the saito 100? In terms of weight, would I have to add weights to balance out the plane using the 75? Would it be just extra weight that's not worth it?

I fly from a very rough grass field so i guess its better to have a lighter plane too.

Also another concern is the landing approach is very very steep at my field due to trees, so another thing that concerns me is the ability to slow down quickly while at a steep angle using a larger engine (the .75)

I have read people using .61s and happy, and people using the .90s and being happy. Any advice is appreciated!

< Message edited by RedStarArmy -- 4/23/2009 12:48 AM >

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 6:22 AM   
w1nd6urfa



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quote:

ORIGINAL: RedStarArmy

Alright, well I have just completed reading all posts here...boy that took awhile. Here is my question, hope some of you veterans can advise me.

I don't have the plane yet, but am about to purchase it from another fellow flier on this forum. This will be my second plane (flying for about a year now) I have no experience with any other engines except for my 46 evo 2 stroke, so I would like to mount another 2 stroke in this plane for now. I have pretty much narrowed down the list between the OS .61FX or the OS .75AX.

Which would work best? I don't want a 'powerhouse' of a plane as I intend to fly it scale like, but its always good to have the extra bit of power to get out of sticky situations. Which is more closely related to the saito 100? In terms of weight, would I have to add weights to balance out the plane using the 75? Would it be just extra weight that's not worth it?

I fly from a very rough grass field so i guess its better to have a lighter plane too.

Also another concern is the landing approach is very very steep at my field due to trees, so another thing that concerns me is the ability to slow down quickly while at a steep angle using a larger engine (the .75)

I have read people using .61s and happy, and people using the .90s and being happy. Any advice is appreciated!


Hi there,
regarding engine choice, I had similar experience between .46 and .55 AX on .46 size warbirds, i would prefer the .55 anytime

Landing: can you give us some rough distances of the runway size and the tree height? I usually fly in a 200-meter long runway that has 5-meter high trees on the approach side, so I fly the final approach say 5 meters above the trees and then kill the throttle (.91 OS FS-II) point the nose down and flare 1 meter above ground. The plane will land in the middle 100 meters of the runway on a windless day, I have landed it in the first half of the runway on a windy day.
The trick is to practice slow flight at a safe altitude first. This 'cat will slow down considerably without stalling, it drops the tail but will hold altitude in this 3D-like attitude ... remember to throttle up before turning her though

Very nice plane, my favourite at the moment



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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 2:44 PM   
RedStarArmy


 

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Status: offline 		my club doesn't really have a runway, rather an undeveloped rough area of grass in a park. The 'runway' is pretty much long enough for any planes needs, but gets rougher as you move on down the line. The trees are well over 5 meters would be my guess (fully grown). What I have to do now (on my p-51 pts) is drop flaps, pass over trees as low as i can, cut throttle and dive as fast as i can, then level out and bleed speed off. On a windless day, the plane ends up if a pretty rough part of the 'runway'. Anyways, thanks for the comments.

Anyone else on the engine choices?

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 5:14 PM   
apcud7


 

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I use an evo .61 in my hellcat. It is light, didn't take much weight to balance it out either. I fly like you do mostly scale and have no need for extra power that will never be used based on how I fly. When I do fly, I fly at about 30% throttle most of the flight. The plane flies great at that speed and flies very scale. I takeoff from a grass field as well, so I pretty much floor it and get it off the ground fast. The engine handles it fine. I attached a link to the video of mine flying with the evo .61 in it. There's a nice pass around 1:18 and I'm flying at about 30% throttle there. The entire video is around that speed with a few faster passes around 50%. The only time I was over 50% was for takeoff so you can see how much extra power there is. For the way you describe your flying, and that you said people are happy with .61s and .90s, it seems like the .61 is the choice since your flying doesn't require a lot of extra speed. I think that if you are flying more than scale and require the power, go with the .75. I think the video I have can give you a good idea of how the .61 performs, especially at 1/3 power.

http://www.youtube.com/watch?v=5Ra5kSWZkT4

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 6:55 PM   
RedStarArmy


 

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Status: offline 		ah! Great, now you switched my mind back to a .61 size That flying looks great and exactly what I had in mind. May I ask how you have your engine mounted and do you use the standard muff or did you get a pitts? Also what prop are you running?

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 7:07 PM   
apcud7


 

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Status: offline 		Well I think that you will be happy with the .61 or the .75. This plane flies great with anything. I think the .61 is more than enough when flying scale, though. Engine is mounted as the manual says, with the head between 7 and 8 oclock when looking at the front of the plane. The evo standard muffler didn't fit inside the cowl so I used a pitts. It's running a 12 x 6 two bladed prop. The second picture shows the valve I used for fueling last year. It worked fine all summer but when I tried it this year, it stuck open a little bit and my engine didn't run correctly. I switched it out for a hangar 9 fuel dot and a dedicated third line for fueling which is working much better.

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 7:10 PM   
RedStarArmy


 

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Status: offline 		any problems running that 2 stroke almost inverted? Did you have to change the fuel tank height?

Also, how much weight did you have to add and where did you add it?

Sorry so many questions but want to get this right the first time

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RE: H9-F6F Hellcat 60 ARF - 4/23/2009 8:08 PM   
apcud7


 

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Status: offline 		Even though it is nearly inverted, it has run fine for as long as I've had it. I didn't change the tank height, just put it in by the book. I can't remember how much weight I had to add. I had those little lead squares and I used six of them. I think that each square either weighed 1/4 ounce or 1/2 ounce. So I either added an ounce and a half or three ounces. They have stickers on the bottom so I stuck them to the top of the plane behind the canopy a bit. I epoxied them in so that they wouldn't fall off since they are on the top of the inside of the plane when it is flying.

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RE: H9-F6F Hellcat 60 ARF - 5/3/2009 11:52 PM   
SteveG79



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Status: offline 		Has anyone installed Century Jet pneumatic retracts in this plane? I'm running a Saito .91 with the new retracts, just wondering if its enough power. She seems heavy with the new landing gear.

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RE: H9-F6F Hellcat 60 ARF - 5/4/2009 1:36 PM   
tom2bell



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I have seara gear that weigh the same as the Century Jet. my cat has a satio 100 and flys with alot of power in denver it wont go vert for long but at sea leavel to the moon alice! Like with any warbird energy managment will go a long way. Your setup should fly fine. My plane wght is 12.5 lbs sheated and glassed she is alot heaver than stock. hope this helped

Tom
quote:

ORIGINAL: SteveG79

Has anyone installed Century Jet pneumatic retracts in this plane? I'm running a Saito .91 with the new retracts, just wondering if its enough power. She seems heavy with the new landing gear.
[what goes up must come down]


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RE: H9-F6F Hellcat 60 ARF - 5/4/2009 3:23 PM   
SteveG79



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Status: offline 		Thanks Tom,

I had some doubts when I picked her up after doing a gear swing test. I'm in IL. so field altitude isn't much of a problem. I'm going to run 20% nitro or higher, maybe it will give her some extra kick.

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RE: H9-F6F Hellcat 60 ARF - 5/4/2009 3:56 PM   
tom2bell



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Status: offline 		I only use 15% coolpower with my satio 100 15x8 mas

Alittle toe in helps the gear stay locked on landing

tom


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