RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)  
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All Forums >> RC Airplanes >> ARF or RTF >> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)
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RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/30/2008 8:29:17 PM   
CCFPILOT


 

Posts: 66
Joined: 1/22/2008
From: Orange, CA, USA
Status: online 		Nether is engine sync, nor gyro on the rudder, but they may be nice to have. I especially like the mods that you guys are doing on the bomb bay. I may (if the plane lasts long enough) do that myself. some day.

At the Toledo show, at the Wingspan booth they were displaying a B25 with a bomb bay that they are intending to sell as an add on to the TF B25. An option is their bomb dropping addition. Nolthing about this on their web site yet.

< Message edited by CCFPILOT -- 4/30/2008 8:52:23 PM >

(in reply to Hellcat716)
       Post #: 1476

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 4/30/2008 10:28:34 PM   
normandouellette


 

Posts: 353
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline 		Hell cat,

When i mention brakes are a must, it is not that you need them for landing this plane but adds scale features that is "awsome" and when you run up the engines full throttle on the runway, it is impressive, and if you commit to a landing that might end up too far it is good to have... I enjoy them very much.

You might be interested in following a thread I started for a VQ A-26 with twin FZ63S.

For now I enjoy the good weather returning and adding hours on that B-25. I t flys and sounds great.

BTW have you flown your B-25 with the twin YS63's?

Normand


(in reply to Hellcat716)
       Post #: 1477

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/1/2008 1:08:30 AM   
camdyson



Posts: 818
Joined: 7/20/2005
From: Bairnsdale, AUSTRALIA
Status: offline 		Re the issue with 4 flaps from one channel, I am using a JR Multi Box - a great little gadget that plugs into one channel of the Rx and has 4 outputs. This has a few advantages:
1. No need for y-leads
2. Separate power supply (optional)
3. Each servo can have centring/endpoint/reversing adjusted independently

#2 is actually the big plus - I'm VERY reluctant to run all the servos for this plane through a single Rx as that can be ALOT of current at times (I've got 14 servos plus a gyro in it!). Landing with full flaps draws alot of current, so by running a separate battery pack/switch to the Multi Box, the flaps aren't drawing current from the Rx.

I have a 3300 sub-C mAh NiMH pack for the Rx with it's own HD switch and voltmeter, and a separate 2700 AA NiMH pack plus HD switch and voltmeter for the Multi Box (flaps). All 4.8V.

Cam

BTW - after getting all excited about my neat servo-slow on the bomb bay doors, I saw a docco' on B25's last night which showed the bomb bay door operation - they virtually SNAP open and closed!

(in reply to MLDELARUELLE)
       Post #: 1478

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/2/2008 6:15:16 PM   
rc74


 

Posts: 56
Joined: 5/26/2004
From: west chester, OH, USA
Status: offline 		Here is my TF B-25 at our clubs annual static show. Satio 82 w/grapner 12/8 props, onboard glow, Twin sync, Nav lights, bomb bay w/ 8 bomb load able to drop 4 at a time. Hanger 9 pilots. Won Best of show!! I did my maiden flight this past wed 4/30. All went great you can see the video on . http://www.rcuniverse.com/forum/m_6779457/anchors_7447815/mpage_10/key_/anchor/tm.htm#7447815 Ron

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(in reply to camdyson)
       Post #: 1479

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/2/2008 9:06:50 PM   
krproton



Posts: 492
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online 		B-E-A-U-T-I-F-U-L rc74!

I can see you put a lot of extra work into your model. But tell me how a guy wins "Best of Show" with an ARF!?! [)]

I'll check out the video from my home computer. Can't wait to see it.

Congratulations.

Tim

_____________________________

Tim Lampe
Hobbico R&D

(in reply to rc74)
       Post #: 1480

RE: Top Flite B-25 ARF (Tecnical, tips, ... - 5/3/2008 7:28:07 AM   
normandouellette


 

Posts: 353
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline 		sm=spinnyeyes.gif]

< Message edited by normandouellette -- 5/3/2008 7:58:19 AM >

(in reply to Hellcat716)
       Post #: 1481

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/6/2008 12:13:22 AM   
europatc74


 

Posts: 75
Joined: 2/18/2005
From: summit, NJ, USA
Status: offline 		Our Club will do both a Best of Show ARF and Best of Show Kit......You still need to assemble an ARF...

(in reply to normandouellette)
       Post #: 1482

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/6/2008 3:21:37 AM   
krproton



Posts: 492
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online 		Well, this is going to take us off-topic, but hopefully not for too long (we'll see!).

I think it is a whole other set of skills to properly assemble an ARF. Without even making modifications, one can "customize" an ARF simply by taking time to work with the covering to get it "nailed down" and doing a proper radio/engine installation. Then there are the mod's such as lining wheel pants with carbon fiber, cowl rings, pilots, etc., etc. So I agree, an award for "Best ARF" is worthy.

_____________________________

Tim Lampe
Hobbico R&D

(in reply to europatc74)
       Post #: 1483

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/6/2008 9:30:08 AM   
asnook


 

Posts: 61
Joined: 5/4/2005
From: herts, UNITED KINGDOM
Status: offline 		Well Guys
I nearly lost her yesterday, the wind was the wrong way for our small field. This means you have to come in over electric wires and drop down short onto the strip for landing.
This increases flying speed and a crosswind did not help, anyway after several landing attempts I was getting low on fuel. Decided the next attempt would have to be fina even if I forced her down.
She still came in far to fast and hit the ground, crunch and she skidded around 10 feet with the nose pointing down. First reaction was thank £$$%* for that as the shaking eased off.
I was dreading going over to inspect the damage. Its my lucky day!
The only damage was the pin on the nose leg had snapped, everything else is fine. Even the nose gear doors are untouched, amazing.

Im having trouble getting the swivel part free from the housing even with all the set screws removed ideas welcome

(in reply to krproton)
       Post #: 1484

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/7/2008 2:10:02 AM   
normandouellette


 

Posts: 353
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline 		EVENTFUL TAKEOFF:

Well nice day little breeze in Montreal, took off work and got to the field at 13:00. Surprize after the 45 min drive, 15 knot wind 90 degree from the runway...Should pack up and leave... I start the engines anyway, runup for a few minutes, top off fuel and air and full throttle on takeoff...and the wind picked up a ribbon 3 feet long from nowhere blown directly on the right engine at full throttle speed and liftoff time, the right engine is tangled with the ribbon and my worst nightmare, it died at 6 inch from the ground, enough momentum to climb to 10 feet and the GYRO did the right thing. The plane abrubtly turned to the right and my normal immediate reaction to level the wings worked. Now its going downwind away from me to its doom...NO WAY, gears up full throttle and maintain level and a slow turn into the dead engine (wrong way but only option) clibing slowly 5 feet per 200 feet skinning fences to about 50 feet and letting the gyro take care of the Yaw, I flew the thing to line it up after a full Looooonnnngggg (never ending) circle to line up with the runway 1/2 flaps gear down (Now it is unstable) throttle back to 1/2 and glide to the runway banking into the running left engine and the plane landed as smoothly as if it had 2 engines.

This 150$ gyro saved this plane (3500$+)from destruction. Some carry around a rabbit leg, well I think I will always carry around a gyro. I have been testing the gyro for engine failure in the air 200feet +with my dual Ace testing slow speed climb to full throttle and idling an engine, would never attempt to do it on a takeoff roll 6 inch from the ground (too chicken) but this time the real unwanted thing happened and it did the job and better: the 24 lbs B-25 climbed on one engine!! (Saito 82). Hope it never happens again but this thing certainely worked. I know my cardiovascular is ok now.

Normand.

(in reply to asnook)
       Post #: 1485

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/7/2008 3:00:04 AM   
krproton



Posts: 492
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online 		Normand and asnook, you guys are killing me! I just about had a coronary reading both of your stories. But I'm very glad both of you saved your models - normand with no damage and asnook with little damage. I haven't gotten my B-25 out yet this year because I've been flying my Extra (sorry).

asnook, get that nose gear fixed yet?

Anyway, I'm reading your posts and keep 'em comin'.

Whew!!!!!!!!

Tim

< Message edited by krproton -- 5/7/2008 7:26:25 PM >

_____________________________

Tim Lampe
Hobbico R&D

(in reply to normandouellette)
       Post #: 1486

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/7/2008 6:54:13 PM   
CCFPILOT


 

Posts: 66
Joined: 1/22/2008
From: Orange, CA, USA
Status: online 		Normand

What a flight.

I'm not sure if my FS 70's would do the job. Also, no gyro. on my B25 either, but I haven't seen any 3 foot ribbons at the field either.

I sure am glad you were able to get back safely.

(in reply to normandouellette)
       Post #: 1487

RE: Top Flite B-25 ARF (Tecnical, tips,... - 5/7/2008 7:05:58 PM   
normandouellette


 

Posts: 353
Joined: 3/12/2007
From: Laval, QC, CANADA
Status: offline 		CCF,

I'm still dozing off this one but I argued many times before the need for a Gyro on the rudder in there. It is a cheap insurance and it will react better than you can. If power is missing to maintain the climb you can still have time to reduce throttle and land ahead with the options you have. This was the worse case scenario and it had to happen.

About the ribbon, it is a detached part of the windsock we had last year that was picked up by the wind. It was green color in the long grass siding the runwa