RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)
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RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 3:32:44 AM

Pilot P51

Posts: 87
Joined: 3/8/2004
From: Corpus Christi, TX, USA
Status: offline

Normand
Now I am really confused. Not really, Will the FA 100 fit inside the cowl or will you have to cut it up. Like I told Tim, I plan to build this plane to scale and don't really want to cut up the cowl at all if I can still get the power. I know the 55's will pull this plane with no problem and they should fit inside the cowl. The FA 100 do sound good, a pair would sound even better then the 70's. They have a different sound to them.

I will keep you posted on what I go with.
Thanks Again
Walt

(in reply to normandouellette)

Post #: 1451

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 3:34:33 AM

morganew

Posts: 24
Joined: 7/5/2007
From: Brooklyn, NY, USA
Status: offline

OK Guys,

I am in an absolute panic. I've recently started building my B-25 in earnest. I was attempting to hook up the throttle control linkages to my O.S FS-70 Ultimate (yes the ones with the pump). Turns out the carb arm needs to be reversed (as was also true for the FS 70 Surpass II). Problem is, I see no way possible to reverse the arm on this engine. I removed the one mount screw, but the carb is asymmetric. It seems impossible to reverse. If this is true, then I really need to to complain to both top flite and Tower Hobbies. This was the engine that was recommended by Tower Hobbies as the replacement for the Surpass II for this ARF. I am hoping that I am absolutely wrong on this. I cant be the only one using the ultimate FS 70 on this plane. Please someone put my mind at ease. I am hoping KProton, will chime in here, or norm will chime in here..or anyone. Do I have two brand new useless FS 70 Ultimates? Say it isnt so...

thanks guys.

(in reply to normandouellette)

Post #: 1452

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 3:45:17 AM

normandouellette

Posts: 319
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline

Walt,

I am talking about the FA100T, not the FA100 there is a difference one is a 2 cylinder and the other is a larger single cylinder. check it out: http://www.horizonhobby.com/Products/Default.aspx?ProdID=SAIE100T

Just imagine the sick sound of a pair of those...

The engine will fit and you only have to cut out the 2 holes for the exhaust pipes, expensive option but why what makes planes fly? Only answer is Money!

Normand

(in reply to Pilot P51)

Post #: 1453

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 4:04:43 AM

Pilot P51

Posts: 87
Joined: 3/8/2004
From: Corpus Christi, TX, USA
Status: offline

That is the one am talking about, sorry I forgot to add my T. One of the guys at the field has one and it sounds great. I agree a pair would have a sound of its on. If they fit I may go with them and just use a short pipe as you did on your 82's. That would really bring out the sound. Agree they are pricey but what the hell.........

Walt

(in reply to normandouellette)

Post #: 1454

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 4:05:02 AM

normandouellette

Posts: 319
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline

Morganew,

Relax buddy, just take 3 pictures of each engines. top view left and right side of the engines installed in the nacelle 1 & 2. Your only problem is to reach the throttle lever, there is numerous ways to adress this detail. I cannot call it a problem because this is a common situation. Keep your engine assembled as is. There is a variety of belcrank system available to reach your throttle lever, for example great plane make one: http://www3.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=gpmq3920 you can use ball link to minimize loose movement and get a precise movement and multiply the amount of belcrank. My buddy building me a P-47 designed a throttle linkage to reach around a tank and is another interesting system, take a look: http://www.rcuniverse.com/forum/fb.asp?m=7268725

this is a simple solution and numerous other solution may be there for you to encounter this situation. I will gladly help you design a linkage to reach your throttle lever.
You also have an alternative servo tray in the nacelle to position the linkage in a preferable position. You will get it!

Normand

< Message edited by normandouellette -- 4/22/2008 4:29:01 AM >

(in reply to morganew)

Post #: 1455

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/22/2008 4:07:23 AM

normandouellette

Posts: 319
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline

Walt

Way to go

Normand

(in reply to Pilot P51)

Post #: 1456

RE: Top Flite B-25 ARF (Tecnical, tips,... - 4/22/2008 11:05:58 PM

timothy thompson

Posts: 2761
Joined: 6/19/2004
From: saginaw, MI, USA
Status: offline

go leccy no throttle hookup

trouble

(in reply to normandouellette)

Post #: 1457

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/23/2008 1:54:44 AM

krproton

Posts: 350
Joined: 8/5/2007
From: Champaign, IL, USA
Status: offline

quote:

ORIGINAL: morganew

OK Guys,

I am in an absolute panic. I've recently started building my B-25 in earnest. I was attempting to hook up the throttle control linkages to my O.S FS-70 Ultimate (yes the ones with the pump). Turns out the carb arm needs to be reversed (as was also true for the FS 70 Surpass II). Problem is, I see no way possible to reverse the arm on this engine. I removed the one mount screw, but the carb is asymmetric. It seems impossible to reverse. If this is true, then I really need to to complain to both top flite and Tower Hobbies. This was the engine that was recommended by Tower Hobbies as the replacement for the Surpass II for this ARF. I am hoping that I am absolutely wrong on this. I cant be the only one using the ultimate FS 70 on this plane. Please someone put my mind at ease. I am hoping KProton, will chime in here, or norm will chime in here..or anyone. Do I have two brand new useless FS 70 Ultimates? Say it isnt so...

thanks guys.

Hi morganew.

First, sorry to put you in a panic. I don't have the resolution here at my fingertips as I have read your message from home, but I can troubleshoot from work tomorrow. But here are a few things...several reviews were done on the B-25 with the same engine as you. I don't know what they did with the throttles, but no mention was made of the situation, so presumably they figured out a reasonable solution.

Second, have you considered the alternate throttle servo location? The one on the bottom of the wood nacelle? This may put your throttle servo in proper alignment with the carb arm.

That's all I can think of for now. Tomorrow from work I'll get an Ultimate and look into this for you.

Please stand by.

Sorry.

Thanks.

Tim

_____________________________

Tim Lampe
Hobbico R&D

(in reply to morganew)

Post #: 1458

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/23/2008 6:41:27 AM

Pilot P51

Posts: 87
Joined: 3/8/2004
From: Corpus Christi, TX, USA
Status: offline

Hey Guys
I talked to Darrell with Sierra Precision Retracts. In May he will also start building and selling the retracts for the TF B25. I have his retracts on all my big planes and I will be getting a set for this plane as well. I don't know what the price will be yet. They will be a little more then the Robart but the quality of his retracts next to the Robart there is no comparison.

Also if you are still looking for WWII pilots, go to KMP models they have 1/6 scale painted pilots for $19.95 that will fit in their B25. They will also fit in the TF B25, they look really well. They are only half body not full body pilots.

Walt

(in reply to krproton)

Post #: 1459

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/23/2008 4:45:08 PM

krproton

Posts: 350
Joined: 8/5/2007
From: Champaign, IL, USA
Status: offline

quote:

ORIGINAL: morganew

OK Guys,

I am in an absolute panic. I've recently started building my B-25 in earnest. I was attempting to hook up the throttle control linkages to my O.S FS-70 Ultimate (yes the ones with the pump). Turns out the carb arm needs to be reversed (as was also true for the FS 70 Surpass II). Problem is, I see no way possible to reverse the arm on this engine. I removed the one mount screw, but the carb is asymmetric. It seems impossible to reverse. If this is true, then I really need to to complain to both top flite and Tower Hobbies. This was the engine that was recommended by Tower Hobbies as the replacement for the Surpass II for this ARF. I am hoping that I am absolutely wrong on this. I cant be the only one using the ultimate FS 70 on this plane. Please someone put my mind at ease. I am hoping KProton, will chime in here, or norm will chime in here..or anyone. Do I have two brand new useless FS 70 Ultimates? Say it isnt so...

thanks guys.

Hi again morganew. I was just checking out your engine mounting/throttle hookup situation with your B-25. So yes, the throttle arm is on the right side of the engine. I did not examine an actual engine personally, but I looked at the photos on O.S.'s web site. As you already stated, it appears as though the carb cannot be reversed. So then, my recommendation would be to mount the throttle servo in the alternat location on the bottom of the nacelle next to the retract mount. Your pushrod will have to clear the fuel tank, but you should be able to do this with ball links (that will elevate the pushrod above the servo arm and the carb arm) and bending the pushrod.

Let me know if you cannot achieve this.

Thank you.

Tim

_____________________________

Tim Lampe
Hobbico R&D

(in reply to morganew)

Post #: 1460

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/23/2008 4:49:20 PM

morganew

Posts: 24
Joined: 7/5/2007
From: Brooklyn, NY, USA
Status: offline

I'll definitely give this a try when I get a chance to resume building this weekend. Thanks for the prompt response. On another note, I know its off topic, but any idea when the shortage of Top Flite Cessna 310 wing replacement sets will become available? I cant find them in stock anywhere...just thought you could shout over the cubicle at the 310 guys while at work

Thanks again

(in reply to krproton)

Post #: 1461

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/25/2008 9:19:29 AM

asnook

Posts: 57
Joined: 5/4/2005
From: herts, UNITED KINGDOM
Status: offline

Well Guy's I finished the plane at the end of last yr and run in the motors on a bench. Last night between the rain showers I fired them up for the first time in the Model. They need a little tweaking as one of them was really rich but the Twyn sync kept them in sync.
Weather here in the UK looks good today so who knows !!

http://www.youtube.com/watch?v=pPoOkZ4QVI8

(in reply to morganew)

Post #: 1462

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/25/2008 12:12:37 PM

krproton

Posts: 350
Joined: 8/5/2007
From: Champaign, IL, USA
Status: offline

asnook,

good luck on your maiden! I'll be watching the thread to see how it went.

Good luck!

Tim

_____________________________

Tim Lampe
Hobbico R&D

(in reply to asnook)

Post #: 1463

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/25/2008 3:26:14 PM

Bill Giulian

Posts: 28
Joined: 2/16/2002
From: Sanatoga, PA, USA
Status: offline

Asnook. Looks and sounds great. Just one question. What are you using for crew figures?
Bill.

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Semper Fi
AMA #12310

(in reply to asnook)

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Post #: 1464