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ProModeler Scorpion Power
rossfox

Heliman

Ringgold, GA, USA

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I have one of the first JR 8103's systems offered back in the 90's. The radio is in great shape. It is on the ham band and so are all of my JR receivers, and they are the top receivers in the 8103 systems at the time. I have been out of flying RC choppers for about 13 years, and plan on getting back into it soon. I have 3 excellent Raptor 30's with flybars, and tons of parts for Raptor 30's. All of these flew great and would fly great again, as I kept them brand new like. All I need is to just put in new flight batteries. My 8103 transmitter will need to have the internal battery that holds the memory replaced, and I had sent my transmitter in a couple of times in the past to the JR service center to have that done. OK, so my question is this. I would like to consider using this radio again and I am wanting to purchase the flybarless conversion kits for my raptors. The part number was 3926 for the flybarless kit. I am having a hard time finding these kits, but that is another story. My main question is - can my existing receivers interface with a new flybarless controllers on the market, and will my existing servos also work? All of my servos are the high end 4131's - high end at the time, ballbearing, pretty high torque, etc. OR - should I forget about going flybarless with these old raptors and just fly them as they are, using all of my existing equipment, receivers, and servos. I started flying RC choppers in 1982, so I know the game of the hobby. I got very good at the aerobatics possible back then before 3 axis gyros. I certainly can't do the stunts the guys are now doing, but would like to fly again. When I started flying GMP Cobras in 82, I had a mechanical gyro, and my old radio back then wouldn't even mix channels. Sorry to rattle on. Looking for advise. Ross

Ross Fox

10-10-2016 04:33 PM
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JuanRodriguez

Elite Veteran

The Villages, Florida

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Unless you have a lot of $$$ burning a hole in your pocket OR are one of those persons that has to have the latest and greatest then there is absolutely no reason why you couldn't pick up where you left off. Bing that you are the ham end of the spectrum, you'll be free from radio interference from the other frequencies, one of the main reasons for the birth of the use of 2.4

So , if it were me, I would keep what I have and replace ALL of the batteries , not only just the transmitter battery...... and go have fun .

Welcome back !!!

Been there, done that and old enough to know better.....

10-10-2016 05:06 PM
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Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Agreed, unless you have just outgrown that radio with your needs it will still serve you well. I flew my original PCM 10 for almost 20 years before i retired it. and only then because I didn't want to send it in to replace the internal memory battery anymore.

drive a rotary, fly a rotorcraft

10-10-2016 05:46 PM
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Heli_Splatter

Key Veteran

Silver Spring, MD by way of Sidney, Ne - USA

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Don't forget all the bearing replacements, seized engines, wood or fiberglass blades that will need replacing. It might just be cheaper in the long run to buy some of the inexpensive used helis being offered for sale. There are a lot of people that never get off the ground.

Some people are running the FBL units on FB helicopters. I think that the direction you select says more about the money you have available for the hobby. I would fly what I have before spending a lot of money. There is likely a lot fun left in the old gear, but I would not update it.

10-10-2016 06:45 PM
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Pistol_Pete

rrProfessor

Seffner, FL

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My main question is - can my existing receivers interface with a new flybarless controllers on the market, and will my existing servos also work?
Yes on the Rx.

Maybe on the servos. Dependent of FBL unit used. Just need to make sure by downloading manual first and check frequencies supported, specially the tail servo.

You can also convert your radio to 2.4GHz by replacing the module.

Google..
JR 8103 2.4 MODULE

I did way back with the FrSky for about $45 (Rx and module). I also replaced the internal battery myself. Just need to get one with tabs already in place.

Radio demoted to the occasional rainy days SIM duties.

~~Enjoying the hobby one flight at a time~~

10-10-2016 07:26 PM
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tadawson

Elite Veteran

Lewisville, TX

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In any case, keep me in mind if you choose to part with the 50MHz stuff . . . I'll buy it . . .

- Tim

Friends don't let friends become electrotarded . . . .

10-10-2016 08:39 PM
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rcheli808

Senior Heliman

Mililani,Hi-USA

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Hey Ross,
I am still flying Ham freq but with a JR XP9303.
Welcome back...

Tim

10-10-2016 10:28 PM
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Toadster25

Key Veteran

Iowa

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I can't remember why but there was a reason I replaced my 8103 with the 9303. I think it was something like it didn't have 3servo ccpm swash mixing or something. I don't have it anymore so I can't confirm that. I guess with the fbl systems now you might not even need that anyway.
I actually still use my 9303 with the 2.4 converter module and switch back to the fm transmitter module to fly my older Heli's. I got one of the modules that lets me dial up any channel I want so it works with almost everthing I need it to. I think the only reason I'd ever want something newer is for telemetry.

10-11-2016 12:52 AM
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Cobra 46

Key Veteran

Cambridge il usa

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Just fly them till your out of parts !!

10-11-2016 02:55 AM
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dkshema

rrMaster

Cedar Rapids, IA

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FWIW...the XP8103 DOES include 3-servo, 120 degree CCPM mixing. Some early models included it, but the feature was not enabled in the TX.

There is a very simple procedure you can follow to turn it and its menus, ON.

I have a copy stashed over in my gallery as a PDF download.

The 8103 was a fine radio, I flew one for many years and still use it for my sim.

It has a wonderful feel, is well-balanced, and the sticks were smooth as butter.

Replacing the internal battery is easy, I have done several, including mine. The battery is readily available from Mouser Electronics.

Your receivers should be fine with nearly all FBL controllers, as most all allow you to connect a standard RX to them using a set of cables usually supplied with the unit.

Many current FBL controllers do all the mixing internally, and you don't need a lot of transmitter functional support these days.

The 4131 servos are analog servos. Though they use the standard 1.520 msec neutral pulse, they most likely are good for a maximum 60 or 70 Hz frame rate. Most FBL controllers are not analog servo friendly, and you will most likely need to replace them with digital servos, or you will watch them fry before your eyes, as they won't handle higher update frame rates.

One major item to keep in mind, however, is that many systems are not happy when powered using four NiCad or NiMh cells in the RX flight pack. You are much more likely to have success if your power source can guarantee that the system voltage never falls below 5 volts under all conditions. Six volts minimum gives you even better operating margin. That generally means a higher battery voltage with a solid regulator and no in-line battery power switch.

Digital servos are power hungry and draw more current than their analog counterparts. Make certain your power supply is up to the task.

If you have taken care of those birds, getting the motors back into shape should be relatively painless. Give the mechanics a good once-over, and you should be flying relatively soon with what you already have. You just might need some new batteries all around and a jug of fresh fuel. ENJOY.

You can fly what you have till you go the flybarless route.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

10-11-2016 04:55 AM
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Pistol_Pete

rrProfessor

Seffner, FL

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Service Menu and some

http://rc.runryder.com/helicopter/t...2/?p=6294744#RR

~~Enjoying the hobby one flight at a time~~

10-11-2016 05:07 AM
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dkshema

rrMaster

Cedar Rapids, IA

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Enabling 8103 CCPM function if it is not already enabled in your TX:

http://rc.runryder.com/helicopter/g...CCPM_ENABLE.pdf

Internal battery replacement:

http://rc.runryder.com/helicopter/g...ery_Replacement

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

10-11-2016 05:22 AM
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allns47

Key Veteran

Richmond IN.

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The fact is for most of us ..the 8103 is more radio then we will ever need...

10-11-2016 12:16 PM
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Toadster25

Key Veteran

Iowa

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Now that I think about it I don't think the 120 3servo ccpm was the problem because I sold that radio with my trex 450se that had ccpm set up and it worked with that heli. I can't remember what the added feature was if anything. I do remember I liked the feel of that radio better than my 9303 but that could have been just because I was used to it already and how it felt. I liked having the display up on top.

10-11-2016 01:38 PM
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riddic

Heliman

Nanjing Jiangsu China

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I think you should fly what you've got. Maybe they are not that trendy but you can still have lots of fun with them. I'm trying to get back into this hobby like you do. I just changed the stick mode and switch the gimbals of my x-3810 adt(known as 8103 in US)today, because 13 years ago I started fly with stick mode1 and now I have been used to mode2. And thanks for your thread I got info about the service menu,which I was looking for. I would upgrade it with a Frsky module. Of course the original FM module works well,and maybe suffers less interference since nowadays nobody else using them Later on I would try to get my Hirobo 30 sized Shuttle back into the air Greetings from China

10-11-2016 04:52 PM
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Flyin for Jesus

Senior Heliman

Dana Point, Ca. 92629

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I had problems with my 8103 when I used a 2.4gHz conversion module. Ohers have has success but I didn't.
I bought a JR 9503 DSMX which is what I'd recommend if you wanted a simple change to 2.4. Plus you then can use SATs instead of a full Rx if you're going FBL.
If not going FBL, keep what you have the way it is.
Oh, the reason for my need to change to 2.4 was my local flight field required it for helis.

10-12-2016 12:28 AM
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rossfox

Heliman

Ringgold, GA, USA

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Thanks everyone for all of the tremendous information and thanks dkshema for those pictures on changing the internal battery out. I really enjoyed flying those raptors and hope to get back in again.

A couple of other questions - looking at the various hobby stores online - it appears to me that JR Radio is few and far between. It looks like Spectrum and Futaba now rule??? I have had Futaba for airplanes and I like them, but when I went mainly to helis back in the mid 80's and then on forward, it always seemed to me that JR was the most involved with helis. I know that I never had any issues with JR and really liked them - still do.

Other thing seems like fuel is hard to find???? I can buy it at Hobby Town here, but it is like buying gold. Can't seem to find it online.

And lastly - thanks for all the replies that you guys have sent. The RC Heli community has always been great.

Ross

Ross Fox

10-13-2016 01:13 PM
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LaDon

Veteran

Fort Dodge .Ia

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Yeah fuel is expensive no doubt. If you look around there are some manufacturers are a little cheaper on fuel than others.

As far as radios go yes the spektrum radio is going to be the most popular out there. Most ppl use them because of two reasons. One bind and fly stuff. It works with most that stuff because horizon hobbies pretty much has the bind and fly market. So since they own spektrum it is a logical match. Second is price. They are cheaper. Most ppl are driven by price now days. That don't just go for here either that goes for things in our every day lives too. Tv, furniture, lawn mowers and etc.

The Futaba radio has been an uninterrupted platform for a long time. The JR spektrum split put JR behind the eight ball for a bit until they got back on their feet. Now they are as big of player as anyone. Maybe not in some areas but in other areas they are bigger. They have definetly improved the radio and servos to be some of the top equipment out there. Personally in my opinion JR and Futaba still are the top of the line.

Team Jr

10-13-2016 01:24 PM
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Slowpoke

Key Veteran

Dublin, OH

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Yes, nitro is getting harder to find..

https://www.recdepot.com/

and

http://www.amainhobbies.com

carry it.

10-13-2016 01:27 PM
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Slowpoke

Key Veteran

Dublin, OH

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here are some hobby shop in Georgia that carry PowerMaster fuel:

http://www.powermasterfuels.com/ind...id=31&Itemid=23

You can also order online.

10-13-2016 01:35 PM
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