bobcat 25 and 50

bobcat 25 and 50
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bobcat 25 and 50 - 3/9/2008 2:35:06 AM

P.R. Racing

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From: Mayaguez, PUERTO RICO (USA)
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Hello guys and gals i'm pretty new to model airplanes and thinking about getting the bobcat 25 and 50 kit. It says it need 8 servos each: which servo do you guys recomend. which engine, prop ect any help would be nice before going and buying things i don't need or getting the wrong things.

Post #: 1

RE: bobcat 25 and 50 - 3/10/2008 3:16:42 AM

Tailspincharlie

Posts: 57
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From: Bakersfield, CA, USA
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I have had a 25 Bobcat and yes it does have 8 servos. You should use HS 81's for the elevator and rudders and standard for the ailerons, throttle. You also need 18" extensions for
the elevators and rudders. It flys well with a OS 32fx really flys fast we clocked it at 107 MPH.

You will need the same servos for the rudders and elevators except they will be HS81's with the metal gears. I am running a Maxnum 52 with a 10x7 pusher prop. I still have it and it is very fast also 124 MPH. If your not really experienced I wouldn't go with these plane unless you have plenty of help.

Tailspincharlie

(in reply to P.R. Racing)

Post #: 2

RE: bobcat 25 and 50 - 3/10/2008 5:13:11 PM

opjose

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Joined: 11/26/2005
From: Poolesville, MD, USA
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There is a huge thread on this plane in the RC Jets section.

PLEASE take the time to go through that thread.

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Build em'', fly em'', crash em'' and build more.

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Post #: 3

RE: bobcat 25 and 50 - 3/11/2008 1:38:18 AM

P.R. Racing

Posts: 36
Joined: 2/23/2008
From: Mayaguez, PUERTO RICO (USA)
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Hello Tailspincharlie thanks for the info but what prop are you using on your bc .25 and opjose thanks for the rc jet info but ot's almost all bobcat 50

Migul

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Post #: 4

RE: bobcat 25 and 50 - 3/11/2008 2:34:52 AM

P.R. Racing

Posts: 36
Joined: 2/23/2008
From: Mayaguez, PUERTO RICO (USA)
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Hey were can I get the OS 32fx engine and are the hs 81 servos the same as standered mini servos and mini servos?

(in reply to P.R. Racing)

Post #: 5

RE: bobcat 25 and 50 - 3/11/2008 6:15:18 AM

Tailspincharlie

Posts: 57
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From: Bakersfield, CA, USA
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I used a 9x6 apc pusher prop and you will have adequate clearence for the prop to the ground. You can order a OS 32fx engine fron Tower Hobbies for about 160 bucks there not cheap but well worth the money. You use standard mini servos.

I hope that that helps. Tailspincharlie

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Post #: 6

RE: bobcat 25 and 50 - 3/11/2008 6:18:28 AM

Tailspincharlie

Posts: 57
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From: Bakersfield, CA, USA
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I meant the standard servos are futaba 3004's you need 4 of them and 4 std. mini servos.

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Post #: 7

RE: bobcat 25 and 50 - 3/14/2008 12:59:06 AM

P.R. Racing

Posts: 36
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From: Mayaguez, PUERTO RICO (USA)
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Hey Tailspincharlie thanks but what mini servos what number i mean, and do you hav any oic of your bobcat or what other hint can you give me.

Thanks Miguel

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Post #: 8

RE: bobcat 25 and 50 - 3/14/2008 1:06:14 AM

opjose

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quote:

ORIGINAL: P.R. Racing

opjose thanks for the rc jet info but ot's almost all bobcat 50

Migul

You may want to go through it anyway...

Things like angle of attack, elevator trailing edge zero setting, relative C.G. and spoilerons all come into play for the Bobcat .25 as well.

The best prep I had for the .25 was having built and flown the .52.

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Build em'', fly em'', crash em'' and build more.

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Post #: 9

RE: bobcat 25 and 50 - 3/14/2008 1:19:07 AM

P.R. Racing

Posts: 36
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Thanks i did get some info in the jet fourm. I called towerhobbies to ask about the o.s. 32 fx and they told me it was discon. but the do have the .32 sx do you know the diffens between them and also what engine prop do you recomend for the .50 bobcat

Again thanks for all the help

(in reply to opjose)

Post #: 10

RE: bobcat 25 and 50 - 3/14/2008 1:41:19 AM

P.R. Racing

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Is the O.S. 55ax abl a nice chose for the bobcat .50??

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Post #: 11

RE: bobcat 25 and 50 - 3/14/2008 3:11:27 AM

opjose

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The O.S. .55AX would be a good choice for the .52 bobcat.

Many are are also flying it with the Tower Hobbies .75 engine ( 2.2bHP ).

I'm flying mine with the GMS .76 ( 2.5 bHP ) ( current availability "late march" made by the same company that manufacturers the SuperTigres and T.H. engines ).

I would venture to say that the .75 or .76 may be a better match to make this a fast and powerful plane, not that the .55AX is a slouch either...

But to get the same performance levels out of the .55AX ( 1.75 bHP ) you need pipes, etc. so you have a somewhat greater expense for about the same or less performance.

Slap a Graupner 11x8 Pusher prop on the .75 or .76 and you have a great speed demon that scoffs at this thing called gravity.

The OS .32FX is the predecessor to the OS .32SX.

OS seems to have changed the liner material and the carb design in the SX, inproving both over the older .32FX.

The .32SX is getting a bit long in the tooth now though.

The bHP specs are identical for both.

< Message edited by opjose -- 3/14/2008 3:22:28 AM >

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Post #: 12

RE: bobcat 25 and 50 - 3/14/2008 3:34:41 AM

P.R. Racing

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ok opjose what about the O.S. 75 ABL engine? with an 11 x 8 zinger ??

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Post #: 13

RE: bobcat 25 and 50 - 3/14/2008 3:43:58 AM

opjose

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Nothing wrong with that!

However AFAIK Zinger does not make any 11x8 pusher props.

You will need to use a pusher prop on this plane.

Graupners are the only 11x8 props that I have found.

I also cut down a 14x7x3 prop to about 12x7x3, but I found it about equal to an APC 11x7x2 Pusher in overall performance but lower RPM's and unloading in the air, so I went back to that until the Graupner's came in.

The Graupner is faster, but the plane is very good with the APC 11x7P.

< Message edited by opjose -- 3/14/2008 3:45:21 AM >

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Build em'', fly em'', crash em'' and build more.

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Post #: 14

RE: bobcat 25 and 50 - 3/14/2008 4:03:39 AM

P.R. Racing

Posts: 36
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opjose i was looking at the tower hobbies catalog and yes zinger makes an 11x8 pusher wood prop item number for $3.79

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