4s Cheetah prop options

[Chilli]

Go back to neutral angle, leave the strut high and give that a shot when you get a chance. The positive got the nose up a little too much. Try to only change one thing at a time. Gonna burn a few packs in my planes before the sun goes down.

[chipgibbs]

When I raised the strut, some positive feeds in. To set back to neutral I may have to trim the end of the stuffing tube.

Chip

[chipgibbs]

The CG3 Cheetah clocked a 55mph run today with an M450/3. Blew over a couple times, I need to extend the battery trays to get the CG forward bit. It's currently at about 28%.

Chip

[properchopper]

The CG3 Cheetah clocked a 55mph run today with an M450/3. Blew over a couple times, I need to extend the battery trays to get the CG forward bit. It's currently at about 28%.

Chip

Nice ! I'll be trying a 450/3 on mine tomorrow. CG is 9.5" from sponson end. I'll report.

[Chilli]

You're getting there Chip. Any change in handling with the strut raised??

[chipgibbs]

Well, the hull is aired out under speed but hooks hard when turning.

[Chilli]

I bet you are spinning out instead of hooking. Someone correct me if my terminology is wrong but hooking is when the inside sponson grabs the water too hard in the turn and thows the boat off balance resulting in a spin out or flip. You see this more often in outboard tunnels. I think your problem may be not having enough sponson in the water to hold the boat in the turn resulting the the rear of the boat breaking loose. A larger rudder can help in certain instances but I don't think it will in your case. Your learing the difference between tuning for top speed and handling. You'll have to find that happy medium between the two.

[chipgibbs]

It's more like the front tip of the sponson drops when power is reduced and the inside sponson digs in. It's not spinning the boat out but, just dragging the inside. The flips have been under full throttle straight line end overs.
I just finished the battery tray extensions so I can get the CG at 30%, This should help with the end-overs. For the turns, I either have to keep it pinned or do some hull truing as discussed in another thread.

Chip
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[Chilli]

Well I stand corrected then. I've know of a particular outboard tunnel that behaves that way. You have to stay on the throttle in the turns or she will hook. Did you try any faster turns?

It's chilly out there today but no wind. I'd be running boats but have worked OT the last three weekends and am way behind on getting ready for Chirstmas. Got to burn a few packs flying at dusk yesterday though. Might do the same today.

[chipgibbs]

Where are you flying?

[Chilli]

I have a middle school accross the street from my community. I'm also a member of the Loudoun County Aeromodelers for when the soccer kids take over the fields during the spring and fall. Have you ever been to the LCAA field ???

[chipgibbs]

I haven't been to the Loudoun field. I've been flying sailplanes since '81. I do have an electric.
I usually fly at Manassas battlefield or our club field in Rockville, Md.

Chip

[Chilli]

I knew you did gliders but didnt know if you had any other planes. The Loudoun Field isnt too far away from you. I'll let you know next time I plan on going there. Looks like Carl is getting back into planes also. There are some guys that fly at Liberty Middle School just a few miles from our pond. I have a feeling we're going to be loading up boats and planes in the car next year. LOL

[chipgibbs]

I have flown at Liberty but, havent run into the other flyers.

[Chilli]

Chip, Here a few threads on RC groups that the Northern VA flyers hang out on. Half belong to clubs and the other half are gypsies that fly mostly park flyers. A bunch live in the Centreville area.

http://www.rcgroups.com/forums/showthread.php?t=1370979&page=1252

http://www.rcgroups.com/forums/showthread.php?t=1576098&page=823