Topic: Jerry Bates Bearcat

What's it fly like Charlie

Whats it fly like Charlie

oi, join the Q!

What's it fly like Charlie?

 

Dunno

CC

Dunno

CC

I do, it's ace............. 

I do, it's ace............. 

Flies nice. Mr Sheep had some photo's.

Sadly I co*k*d up the landing and knocked the other leg off 

Just a metal pin to be sorted this time though.

Hoping to have another go on Sunday. Bl**dy thing will not beat me 

Charlie C

Flies nice. Mr Sheep had some photo's.

Sadly I co*k*d up the landing and knocked the other leg off 

Just a metal pin to be sorted this time though.

Hoping to have another go on Sunday. Bl**dy thing will not beat me 

Charlie C

To be fair to Charlie, the leg that broke was weakened already. We were amazed to see a hole drilled through the top of the leg, and a "tap" broken off in the hole

No wonder it broke. 

To be fair to Charlie, the leg that broke was weakened already. We were amazed to see a hole drilled through the top of the leg, and a "tap" broken off in the hole

No wonder it broke. 

I am hoping to get some landing practice in on Sunday 

How hard can it be 

Did ewe get any photo's Stuey

Charlie C

Mr C, you don't make it easy for you when your flying off a field that is prone to holes, lumps and bumps. Might be worth looking at sites which are easier on models

Mr C, you don't make it easy for you when your flying off a field that is prone to holes, lumps and bumps. Might be worth looking at sites which are easier on models

I had thought about that 

Its all fixed now. Going to have another go tomorrow.

CC

I had thought about that 

Its all fixed now. Going to have another go tomorrow.

CC

Scret Charlie with our field is not to fly it in....

Scret Charlie with our field is not to fly it in....

Or put bigger wheels on 

CC

Flew it three times today.

Still things going wrong 

Three good flapless landings though.

Engine gone sick on me on take off, three times but works Ok, pulling 6430 on the ground with a Menz 19X10.

The small brass pipe off the carb pump cover was found missing after flight number 3 which just has to be the culprit.

To get it flying the throttle was wide open all the time yet its still coughing as if running rich.

The problem with that is the flaps are programmed to retract at 95% throttle 

Charlie C

this is what it should sound like Charlie.....

<a href="http://www.youtube.com/watch?v=RPQg5TgK0Fo" target="_blank">http://www.youtube.com/watch?v=RPQg5TgK0Fo</a>

Charlie,

Hope it get her sorted out. Nice job of it.

Jerry

this is what it should sound like Charlie.....

<a href="http://www.youtube.com/watch?v=RPQg5TgK0Fo" target="_blank">http://www.youtube.com/watch?v=RPQg5TgK0Fo</a>

Hmmmmmm,

Ewe mean I need a radial.

Gotta good number for Santa 

Thanks Jerry.

All fixed up again. Going to try tomorrow afternoon 

Charlie C

Another 3 flights this evening 

I flew two and Mr Sheep flew one.

It needed a bit of an engine fettle/tweak but its not far off now. It still drops a few revs when looping, pulling hard turns or slow rolling which is a bit wierd  its manageable though and a lot better than it was.

3 good landings a well. Must have been good ones as the legs are still attached.

Its at that stage where I need to get a few more flights in and get properly used to it.

I do like it though 

Charlie C

Well done Charlie.  Glad you are starting to enjoy it

Garry

Charlie

If the engine is running Ok straight & level, but doing odd things when manoevering, it's most likely an airflow issue (over the carb).................what set up have you got?

Baffled cowl
Carb bend
Trumpet
Balance pipe

...etc etc etc.....

Phil

Charlie

If the engine is running Ok straight & level, but doing odd things when manoevering, it's most likely an airflow issue (over the carb).................what set up have you got?

Baffled cowl
Carb bend
Trumpet
Balance pipe

...etc etc etc.....

Phil

YAY, great minds think alike..... Well your great mind and my suspect one...

I said the same to CC last night.... It's a strong engine on the ground, revs and throttles well. But in the air S&L it's OK, but feels overpropped when banking, climbing or looping........ Engine noticanly loses power on half flaps too, You can hear the revs drops as the flaps lower!

Set up is
Engine inverted
No carb bend.....
Short Trumpet with matched balance pipe exiting the cowl on the port side
Baffle on the upper half of the cowl, lower half is open

CC could always nick the carb bend from his P51 and try that I though...

Here you go guy's, this is the set up, just as Stuey described.









Its OK to fly as long as its straight and level or gentle banked turns.

When you lower the flaps you can feel/hear it dropping off. 

I could "borrow" the carb bend off the Mustang as Stuey mentions.

I am thinking of putting a standard exhaust on instead of the big one that's currently fitted t see if it makes a difference. 

Ideas gratefully received chaps.

Charlie C

I am really taken with this Bearcat of Charlies.....

Found this .... Yum


<a href="http://www.youtube.com/watch?v=n-B-JoB-zDs" target="_blank">http://www.youtube.com/watch?v=n-B-JoB-zDs</a>

Back to square one today 

The lead ballast in the cowl broke away in flight. We heard something crack off and the model became very twitchy in pitch.

Called a quick landing as I knew something was wrong but didn't know what.

It was a bugger to land and there was a bit of a breeze. Normally I would have gone around, but I didn't want to this time and it hit the deck a bit hard.

Yup, leg out of wing again. 

The reason for all this mayhem was the ballast weight had, luckily, gone backwards, however, the Cof G had gone backwards with it, enough to make it unstable in pitch.

God, I think someone is trying to tell me something.

Charlie C

P.S. I have had a glow powered Funfly type model that I muck around with in all sorts of weather. Flew that afterwards. Guess what. it went completely nuts in the air and threw itself into the ground. I went home after that.

Don't be sad Charlie C 

Just one of those planes eh Charlie, mine is my YT Hellcat. Got 12 flights, 8 gooduns and 4 not so good, ha.

Oh no, and I thought you said you weren;t gonna fly again Charlie,...

Chin up fella....

That Bearcat is a good 'un, it's a lovely flyer and considering of what it's gone through it's still remarkably complete. Any other model and it wouldn't still be here.

I think everyone at Hilgay took damage today except Giles's Cub 

I'll still take that 5 quid zenoah Charlie, but you can keep the 200 quid tank !

Bad luck on further damage Charlie 

Regarding the engine issues......shorten the balance pipe and put a length of tygon over it and feed it back into the cowl and through a small hole in the firewall (tight enough so it won't fall out)

The issue you have is as you are maneuvering about, air pressure/speed is fluctuating over the mouth of the trumpet & the end of the balance pipe causing the carb to do all sorts of odd things. What you need is a nice still, stable air pressure over the balance pipe, what happens over the trumpet is immaterial......to get this, it has to be inside the fuselage (make sure no air entering the cowl can also enter the fuselage, if there are any lightening holes in the front former, blank them off). With the balance pipe feeding of nice still stable air that doesn't fluctuate in pressure or speed when chucking the model about the carb should behave itself.

The only time the trumpet & balance pipe need to be the same length is if they are BOTH passing through the firewall (with a bend fitted).......if no bend is fitted and the trumpet is passing outside the model, the length of balance pipe doesn't matter, it's the fact it's feeding off still air that matters (I've run 8-12" of Tygon on balance pipes in the past, never an issue)

Phil

Would it be insensitive for me to say I'm rather happy now that you pipped me to the post at buying this model 

Would it be insensitive for me to say I'm rather happy now that you pipped me to the post at buying this model 

very.........

I think everyone at Hilgay took damage today except Giles's Cub 

And except a rather well flown P47 too   

Phil,

Many thanks for that, its much appreciated.

The plan:

I have moved the flight battery over the engine (it was behind the CofG ) and got rid on the ballast. If any more is needed I can easily add weight to the engine box, though I have this feeling its not going to be needed.

That's about 1lb less to lug about.

I have fitted standard Z38 silencer with the louvres bashed flat and filled and a brazed downpipe fitted and removed the carb trumped and balance pipe.

In light of Phils post, I think I will re-fit a balance pipe stub and then tygon it to the fuselage, which is the same set up as my Mustang, but leave the trumpet off and fill in the hole in the cowl.

I have slapped the leg bearers and bits back together with loads of epoxy. It wont get painted till its flown and I intend to make up two sacrificial leg adaptors twixt leg and retract in the hope that in the event of another arrival they will bend instead. If it all works out, I will look at a more permanent repair another day. 

The flap mountings are not brilliant either. There is a lot of slop, so they are going to be re-worked.

Second hand models  never again.

Charlie C

Second hand models  never again.

I say that sooo many times yet I seem to be a magnet for basket cases!

Keep at it Charlie - it'll be worth it in the end.

Garry

Keep the trumpet Charlie.......this way, at least the carb is breathing on cool air from outside rather than air that gradually gets hotter & hotter inside the cowl. No trumpet & an extended balance pipe will work, but you'll find you'll get a gradual drop off in power as the inside of the cowl gets hotter.

Phil

Phil,

Many thanks for that, its much appreciated.

The plan:

I have moved the flight battery over the engine (it was behind the CofG ) and got rid on the ballast. If any more is needed I can easily add weight to the engine box, though I have this feeling its not going to be needed.

That's about 1lb less to lug about.

I have fitted standard Z38 silencer with the louvres bashed flat and filled and a brazed downpipe fitted and removed the carb trumped and balance pipe.

In light of Phils post, I think I will re-fit a balance pipe stub and then tygon it to the fuselage, which is the same set up as my Mustang, but leave the trumpet off and fill in the hole in the cowl.

I have slapped the leg bearers and bits back together with loads of epoxy. It wont get painted till its flown and I intend to make up two sacrificial leg adaptors twixt leg and retract in the hope that in the event of another arrival they will bend instead. If it all works out, I will look at a more permanent repair another day. 

The flap mountings are not brilliant either. There is a lot of slop, so they are going to be re-worked.

Second hand models  never again.

Charlie C

I cant believe all this..........

Im not going to get into any tit for tat argueing, but I can honestly say that over the several years of ownership (and beleive me it was flown VERY regularly), all I ever changed was the carb diaphragm and the spark plug! You must either be very unlucky, or tinker way to much to have all these problems at once

This post isnt a dig or anything, I just take offence at effectively being blamed for selling a bad model, which is obviously the easiest excuse because the seller cant defend themselves.

Oh behave yourself.

If I had wanted to stir anything up I would have told the whole forum who the model came from.

I have actually made sure that I didn't, cause I'm not like that.

The three pages on this thread are exactly how things have panned out. As for tinkering, well, apart from putting in a 2.4 receiver and changing the servo's and battery I haven't tinkered with anything.

Luckily, there are those on here who will attest to that.

Charlie C

Steady on chaps

I know both of you and wouldn't have a bad word to say about either, I know Ramsay has flown the model extremely regularly without issues I know of and also know Charlie C so play nice fellas, second hand toy aeroplanes and all that

Ian.

I have been away for a week up in the middle of the Yorkshire Dales. I tried throwing the Radian off a few slopes, hmmmmm, need a better glider for that lark, a little foamy isn't heavy enough. Good fun learning though.

Anyway, whilst away, I have been giving this thread quite a bit of thought.

It was never started to try and start a slanging match. In fact, I expected to sort out a few bits and pieces on the Bearcat, stuff that anyone else would have done, namely. changed some servo's, receiver, switches and battery, all for 6V stuff and go fly. Job done.

Sadly, its not worked out that way as you can see form the previous three pages.

In all the time since, I have never slagged anyone off, in fact I have gone to the effort not to name anyone, all in the name of second hand models and all that.

So, I felt a bit upset before I went off on holiday. I can't actually see what I have done wrong 

So, now that I am back, I have re-started fixing and I have decided to set the model up how I would have done it if I had built it, nothing wrong with that, its a personal thing.

Right then, to the crux of the matter.

Do you guys want me to keep on posting on developments. (I have a few more photo's done today) or, should I desist and get the thread removed in case anyone else gets upset.

Your choice guys, tell me what you think.

Cheers.

Charlie C

Keep at it Charlie

Alan