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

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flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 1:13:00 AM)

Guys,

May we talk a little about electronics here?
I'm planning to use Smart-Fly products like the SUPER REG and POWER EXPANDER SPORT

What do you think?

Flavio



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 1:16:42 AM)

Sgoen,

Go gow go electric but go glow! The OS 70 has a fabulous sound, My heart was for the 70 but I had a pair of 82's. There is no reason for a glow engine to stop. The main reasons for an engine to quit is a wrong set-up. Everything from the tank to the muffler has to be perfect. Engines don't go dead for no reason. All info's are there in the instruction book; just read, understand and follow the instructions and you should have no dead stick. You must know an engine specialist (ask a guy who fixes his own engines and makes no mystery about it...) and they will set your engine; specially if you tell them it is for your new B-25, they will line up! Once an engine is tuned, you should never but rarely adjust the settings. There are some peripherals you can add for added ease of operation and will increase reliability. The first is a glow driver, for the B-25 the MCD472TE (twin engine glow driver) from Sonic-Tronics (McDaniel) You should order it directly from Hank @ Sonic-Tronics. I know wholesalers don't offer it. it goes for about 125$ and will keep the glow plugs on. Various set up may be made but for the B-25 you whant to set it to go on when you are 20% power and less, it goes on automatically and will not use an extra channel. The added feature of the glow driver eliminates the need of "plugging your glow igniter" (when you start the engines) and drill a huge ugly hole in your cowl to start your engine. You may also install a pump; this will maintain reliable and constant fuel flow. For a twin you cannot use the oscillating pump but you may use the "VP30 Perry pump", +/- 30$ on each engines. This is overkill but if you are a maniac, it is another system to add on your model and the main advantage is you can go "straight pipe" no more muffler pressure and you eliminate an ugly protruding muffler with a small hole on the side by a pipe sticking out by about 1/4 inch.

Enjoy the sound of your 4s glow engines, by all means!



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 1:54:19 AM)

you cant help it if a glow plug goes. even new ones go. why the resistance to e power



flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 2:00:34 AM)

Timothy,

quote:

why the resistance to e power


I agree, but only if you can add some sound simulation... This bird with no sound would be a waste...

Flavio



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 2:40:37 AM)

Electric systems are not flawless!!! batteries go dead...wrong connection... Electric systems has its own list of problems begining by controllers... All in all both electric and glow has their own myth..."electric systems are flawless" is a myth and not true, as well as "glow engines go dead" is also a myth and not true. Electric main feature is "clean" and glow main feature is the "sound". Electric motors performs well and batteries got smaller and delivers impressive amount of power. Glow engines are facinating work of art and produce great sound. Our positions on power questions shows well that there is a market for both electric and glow/gas. It all depends on how you feel about it and what you beleive. I often joke about electric but it is a great system and I envy those who fly electric at the end of the day while I clean off the greasy oil all over my models. I know blondes are good looking but I love my brunette! This is what it boils down to. You should not base your power plant choice based on myth but on personal preference and what excite you. Remember this is a facinating hobby and it is fun.

Flavio for electronic set up and for the previous thread, I suggest to install a match box for the flaps. It will be impossible to match the 3 position precisely without it. Do not take the chance to switch on flaps and watch your plane behave unexpectively. this is a simple setup. match the servos at neutral; normally position 1, ie: 15 degree flap mechanically by adjusting the clevis and have the same throw on each flap. then position 0 (retracted / no flaps) will be adjusted with the "match box" to adjust the up stop position equally. Then you switch to position 2 and adjust the down flap (approx 25 degree from the chord line of the wing) andadjust the servos through the match box equally then save your settings by switching the match box dial to zero. The instructions are only a few paragraphs and well explained. As far as electronics this is my best suggestion.

good night guys and keep up the good work!



KenVC -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 2:50:17 AM)

McDaniel cueently has the twin engine unit on sale for $105.00. These are the best glow drivers I've had.



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:11:07 AM)

I agree with you



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:21:50 AM)

match boxes are the way to go on the flaps. if i use air to open my bay doors ill need a small seperate air supply



flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:24:38 AM)

Norman,

quote:

Flavio for electronic set up and for the previous thread, I suggest to install a match box for the flaps. It will be impossible to match the 3 position precisely without it. Do not take the chance to switch on flaps and watch your plane behave unexpectively. this is a simple setup. match the servos at neutral; normally position 1, ie: 15 degree flap mechanically by adjusting the clevis and have the same throw on each flap. then position 0 (retracted / no flaps) will be adjusted with the "match box" to adjust the up stop position equally. Then you switch to position 2 and adjust the down flap (approx 25 degree from the chord line of the wing) andadjust the servos through the match box equally then save your settings by switching the match box dial to zero. The instructions are only a few paragraphs and well explained. As far as electronics this is my best suggestion.


This is great tip for us all!! You're talking Jr's MatchBox. Chief has a twin pack for 109.95 and I've ordered mine. I'm jus wondering (maybe you could help) if it allows Futaba J connector or only Jr's...

Thanks again, Norman!! And I yet say YES to Smart-Fly products I mentioned above.

Flavio



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:44:15 AM)

Yes the JR matchbos will work on your futaba. You may also use a matchbox for the 3 servo connected to the rudder. Not that it is critical but because the matchbox also enables you to power separately this "bundle of servos" . I know I will connect a separate battery to power the 4 flap servos and the 3 rudder servos. I am setting up 4000 mah NiMH on the receiver and a second 2700Mah NiMH with a "Y" to power the 2 matchbox. 6 volt! You take away the taks of powering 7 servos away from your receiver.



krproton -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 4:01:07 AM)

You guys have my head spinning;

Matchboxes, on-board glow batteries, sound systems, bomb bay doors! [sm=spinnyeyes.gif]

But hey, that's the beauty of this hobby--there are no rules that say what equipment you have to use and everybody can do what they like best.

Well, nobody seems to need my assistance or advice tonight, so I'll just go to bed now. I'll check in again tomorrow! [:D]

Tim

P.S. I got in three more flights on my B-25 today. The weather was beautiful--light winds, sunshine, warm (approx 60 degrees F which is great for late October in Illinois!). Nothing to report other than to say this plane truly flies even easier than a trainer--I swear it! (Okay, well, it doesn't have the self-correcting tendencies, but I think it lands even easier!)



kochj -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 7:21:16 AM)

glow vrs Electric... HMMM

I am a engine nut, so electric is out of the q' for me....
But have you seen some (or rather heard) of the lectric sound systems on these planes?

I have heard some very convincing recondings of engines, and if it has a Laud, clear speaker system it is quite amazing....

Now if were a large giant scale bearcat and I had the option to place a large, gas, rotory engine in it..... well it would be a done deal, but it isn't and
I can see the beni's of electric systems in a plane like this one..

Justin



flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 2:47:13 PM)

Hi, Jim (Kr)

quote:

Matchboxes, on-board glow batteries, sound systems, bomb bay doors!


The tendency is that we push the envelope more and more... We're many heads thinking and trying to squeeze the best out of it... :)

quote:

But hey, that's the beauty of this hobby--there are no rules that say what equipment you have to use and everybody can do what they like best.


Exactly. That's why we don't get bored after years and years!

quote:

P.S. I got in three more flights on my B-25 today. The weather was beautiful--light winds, sunshine, warm (approx 60 degrees F which is great for late October in Illinois!). Nothing to report other than to say this plane truly flies even easier than a trainer--I swear it! (Okay, well, it doesn't have the self-correcting tendencies, but I think it lands even easier!)


Ohhh!!! And Tower Hobbies doesnt have it in stock yet... Darn.

Flavio



flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:07:47 PM)

Guys (specially Jims),

I'm having a little concern...

As I said, I'm going electric to take less chances of a dead engine and I don't see a point to go electric whith this bird without a good sound simulator.

I'm going with this http://www.aerosoundrc.com/products.htm.

Question is:

Will the 4" speakers fit IN the engine compartment? If not, is there any place I can install them?

Thanks,

Flavio



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 3:59:43 PM)

Flavio

You have plenty of space in the rear compartment behind the gear doors. But if you are to install a speaker you should consider installing it under the main cokpit and the sound will be heard clearly or also another location is one on each side in the side gunner area. you may also use the speaker as a seat ans add a back rest to decorarte the inside of the side gunner windows. I inserted a picture the only one I found. You may whant to spray the inside with zinc-chromate paint, available in jars at the hobby shop or at any aircraft supply store at an airport near you. It will enhance the look of the inside and also you may whant to purchase two chairs plastic, available again in different sizes at the hobby shop and install your speaker as a seat. you then combine practicability and enhance the looks of your model. I wish the image uploads.



flaviosi -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 4:06:19 PM)

Norman,

Great tips, thanks a lot. I'll keep you guys informed.

Flavio



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 5:11:33 PM)

hey that a real 25 any more pics



normandouellette -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 6:40:40 PM)

Hello E-Power Tim,

I found those on the internet. I have more but so many that I will sort out the ones that we may need for detailing the pilot cockpit for example. Still looking. BTW Flavio you can esealy make your own chairs with two little aluminium tubes and some balsa...

Talk to you soon...



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 7:14:45 PM)

those are exactly what i need any more bomb bay pics with the door hinging mechanism would be appreciated that bomb bay pics are what I need



rcmorrow -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 7:17:58 PM)

Hi All,

There are quite a few site on the net with information and great photographs for deatils and authentication of the B-25. There is also a running thread on B-25's here on R/C Universe that seems to have some good information and also some links that might be helpful:

http://www.rcuniverse.com/forum/m_6274723/tm.htm

Take a look through the thread and see if this might help at all. Also, Squadron Books usually has some great information with color plates of the aircraft and varients. They usually have good detail photos of the aircraft.

Another source for scale documentation is the photo pacs avaiable from Bob Banka Research (I think that is the name of the group, but I am getitng loder and my mind is a bit fuzzy these days !).

Hope this might be helpful.



p39 -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 7:27:03 PM)

You guys know what's scary? I started my B-25 in earnest last night. Started at the front of the book.... yes, I know- why there? But it starts with hinging the flaps and ailerons. Ok, this is scary, but it was actually fun. Easy. Fun and done. The boys did their research on product development and instruction manual writing.... congrats. On to mounting engines and tanks and retracts tonight.... and for those who are wondering... OS 70's.



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 7:32:47 PM)

come on cut out the bomb bay im taking pics as i go and will download later . its really easy and i have a access hatch for the radio rx too



mike-rc -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 8:00:19 PM)

I will be using E Flite power 60 motors on 7S in my B-25. I was thinking of making the cockpit removable for easy access to the batteries. I do not want to have to flip the plane over for battery access.
Anyone else have a problem with the wooden levers for the main retracts? I broke one twice and glued it back together. I think this part should have been made from a more durable material. I own a precision machining business, so I could make some up out of alu, but it will still take some effort.



timothy thompson -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 8:53:26 PM)

axi 4130-16 are more powerful . i used the power 60s on the tf 310 and she flys great at 22.6 lbs



mike-rc -> RE: Top Flite B-25 ARF (Tecnical, tips, suggestions) (10/29/2007 9:09:58 PM)

I already had one Power 60, that is why I went with them. Their ratings are very similiar. The Power 60 looks like a copy of the AXI. Actually allthe E Flite outrunners have the exact same dimensions as the AXIs. I am using the AXI threaded shaft adapters which fit the E Flite motors perfectly.



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