Official FlightLine RC 1600mm F7F-3 Tigercat Thread

[Grossman56]

I have a Dubro prop balancer and it works fine with other props, this one just has that smaller diameter hole that won't allow the balancer shaft to slide through. Great suggestions guys, now, I'm trying to eliminate any possibility of a repeat crash which was caused by either a prop or motor mount failure. You know what it's like when you've narrowed it down to a point but can't say definitively that 'that' was the problem.
A guys gets a little nervous after going from this:


Back to this:



You know what I'm sayin'

Grossman56

[davegee]

Grossman56, are you now experiencing vibrations that you didn't have? If not, I'd say your props must be pretty darn close to perfect.

Could you use carbon fiber tube or rod as the 'shaft' for your balancer?

I don't know which balancer you own, but I have CF tube which comes in metric sizing as well as Imperial.

Best, LB

I agree with LB. I have had several planes with 3 bladed props, including one like your Tigercat, and I found a very low friction metal tube or something, ever a smooth finish screwdriver blade (Philips head) to slide the prop on and see if there is movement showing a heavy blade. I think Motion had a little video out and he balance three bladed props with it. It was pretty interesting, but I had been doing that for years. Worth a try, anyway.

Cheers

davegee

[Elbee]

Grossman56, are you now experiencing vibrations that you didn't have? If not, I'd say your props must be pretty darn close to perfect.

Could you use carbon fiber tube or rod as the 'shaft' for your balancer?

I don't know which balancer you own, but I have CF tube which comes in metric sizing as well as Imperial.

Best, LB

[Grossman56]

Hey guys, here's a question that I've been meaning to ask but keep forgetting. How do you balance the prop?? I have a prop balancer but the hub's hole is so small in diameter that the shaft for the balancer will not fit through. I'm embarrassed to admit that even though I've had this bird for several years, I've never balanced them
Any suggestions?

Grossman56

[Grossman56]

Good news! I know I've had a couple of instances where I've noticed a lack of power in an airplane and recalibrated the ESC and it's helped, even though it was recalibrated before (several seasons before) Sitting idle through the winter months seems to do some strange things. I bench test everything before the first season's flights. Cheaper to find a problem on the ground than in the air.

Grossman56

[Yellowred]

So recalibrated the motors today and it seems to have cured the problem, Thanks Guys

[Grossman56]

I think I'd start there. I wonder if he calibrated the ESC's after modding the power routing??

Grossman56

[Evan D]

That's what I'm thinking too. Some mix or unintended odd throttle cut maybe.

[Grossman56]

I wonder if its throttle curve on the radio?
I've had mine bridged for years with the stock motors and the 760's and never had a problem.

Grossman56

[Evan D]

Does the throttle advance smoothly looking at your radios screen? On just about any radio you can put the screen to display the electrical movement of a channel. I can't see the bridge causing it.

[Yellowred]

Odd, both motors the same? Could it be in your transmitter? On the monitor screen does it advance like it should? Can you bind it to another plane to at least see if it’s on the tx or RX side?

Yes both motors are stock, everything is ok on all my other planes, looks ok on the monitor screen too?
The only thing I can think of is that I have bridged the power wires so the each Esc and motor are connected to Both liops

[Gilatrout]

Tigercat Thursday

[Evan D]

Odd, both motors the same? Could it be in your transmitter? On the monitor screen does it advance like it should? Can you bind it to another plane to at least see if it’s on the tx or RX side?

[Yellowred]

Hi guys, maiden flight of my Tigercat was a great success, she flys great, I have a small problem and need your help, I calibrated the motors, well I think I did, they Both power up evenly and the plane flys straight. but.... when I go for take off and slowly open the throttle there is a "flat" spot low down on the throttle, the motors start to run and then no increase in power until I'm about 40% throttle and then it suddenly all comes in and the plane jumps off down the strip!! Have I done something wrong while trying to calbrate the motors? Any help would be appreciated, I have Spektrum radio

yellowed

[davegee]

A successful re maiden this morning!
Two flights on La Patrona, all went well, a couple of clicks of trim and nothing out of the ordinary.
Such a great bird, so great to have her back after almost two years. The pics are shortly after the second flight. Funny the things you forget about, like having to trim a bit of the bottom of the battery hatch to fit the 3600 4s's in.
All is well in Wyoming again!

Grossman56

Good job, Dan! Way to stick with a project to a successful completion, especially after the mishap two years ago. Looks great!

Davegee

[jetfool]

Grossman56,
Great to see she got some air under her legs. Congratulations 🍾
Best Regards, Rex

[Grossman56]

A successful re maiden this morning!
Two flights on La Patrona, all went well, a couple of clicks of trim and nothing out of the ordinary.
Such a great bird, so great to have her back after almost two years. The pics are shortly after the second flight. Funny the things you forget about, like having to trim a bit of the bottom of the battery hatch to fit the 3600 4s's in.
All is well in Wyoming again!

Grossman56

[rifleman_btx]

I'm seriously thinking about building the nexa with the 38cc engine

[davegee]

Had the Grumman fleet out for pics this morning before loading the Bearcats up to take to the field.




Bearcat, Tigercat, Bearcat and Kittycat!!



Bearcat III



Bearcat I

Hard to believe that two of them spent some time in the junk box.

It can be done!!

Grossman56

Kudos, Dan! They look marvelous!!

Davegee

[Grossman56]

The Commemorative Air Force Bearcat certainly does, she sat in the junk box since 2018 and first flew again in 2022. The Tigercat went in almost 2 years ago and hasn't seen air time yet, a couple of things to check out first, but I'm in no rush. The Blue Angels Bearcat is now about 2 years old and has never suffered so much as a scratch (touch wood)

Grossman56