RunRyder RC
 21  Topic Subscribe
WATCH  6 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ] 14671 views POST REPLY
ProModeler Scorpion Power
aileron bail

Senior Heliman

The guy with the dog named Aileron

My Posts: All  Forum  Topic

RAJA'S JEWEL

Well its nice to see that the jewel is finaly accepted in the gasser circle.I was one of the first people to have one and was great then as it is now.When i got mine i put reflective tape around it and it sparkled in the sun and when people saw it in flight sparkle they asked what it was i said its the Rajas Jewel just jokeing around and it stuck. Raja and myself caught alot flack about how safe it was and it has turned out to be something that adds safety to rc helis NICE JOB RAJA!!!!! we need more people like Raja in the rc game, people who thinks way out of the box with open minds.

08-17-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
turbogti

Veteran

St. Andrew, Jamaica

My Posts: All  Forum  Topic

The Jewel is definately a must for gassers, i myself am waiting for Raj to get parts so that i can place my order, the heli has been modified to accept the Jewel.

I also believe that Gasser company's should offer Raja's Jewel as a factory option, as its such a necessary item.

Aileron Ball how long have you had your Jewewl?

****Predator Gasser SE - She's Ready to rumble ***

08-17-2008 Over year old.
PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
aileron bail

Senior Heliman

The guy with the dog named Aileron

My Posts: All  Forum  Topic

I think it was 2004 or early 2005,Hey Raja when was it ?

08-17-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
turbogti

Veteran

St. Andrew, Jamaica

My Posts: All  Forum  Topic

3-4 years ...any issues/problems/failures?

A great product no doubt, i wonder if you could measure any saving in electricity charges that you save since by not using your charger to charge the batteries over that period

****Predator Gasser SE - She's Ready to rumble ***

08-17-2008 Over year old.
PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
AceBird

Elite Veteran

Utica, NY USA

My Posts: All  Forum  Topic

I's say it's a toss up. About a quarter for the whole season either way.

The cost savings is a about a grand if your heli does the funkey chicken.

Ace
What could be more fun?

08-18-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
SUBA

Heliman

IRELAND

My Posts: All  Forum  Topic

I have had my generator for a while now (Thanks Raja) but i just got to try it today on my spectra g as the weather has been bad here and i must say anyone flying a gasser without one needs their HEAD looking at this is an essential piece of kit...

GASSER GASSER GASSER!!!

08-22-2008 Over year old.
PM  EMAIL  Attn:RR
Eury

rrProfessor

Nottingham NH

My Posts: All  Forum  Topic

It's definitely not a bling thing, in fact, I think it's ugly and stupid looking hanging out the top of my Spectra, it'd be a whole lot nicer if it weren't there. However, the functionality makes it 100% worth it. It's nice having a redundant power system, and never having to touch the batteries. I run 8717s, and it has no problem keeping up with them, which is a real concern with those servos. I already lost one gasser from a power failure, it would have been a lot less money to have just put a Jewel on it from day 1.

Nick Crego

Citizen #0168

08-22-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
pgkevet

Key Veteran

Wales

My Posts: All  Forum  Topic

It's definitely not a bling thing, in fact, I think it's ugly and stupid looking hanging out the top of my Spectra, it'd be a whole lot nicer if it weren't there. However, the functionality makes it 100% worth it. It's nice having a redundant power system, and never having to touch the batteries.
Ditto!

Only 7 tanks since i fitted it and great to have no recharging to do!!

pgk

08-22-2008 Over year old.
PM  EMAIL  Attn:RR
iedit4tv

Senior Heliman

Santa Clarita, California

My Posts: All  Forum  Topic

My Jewel Setup

I recently installed a "Jewel" on my gasser. I'm using the dual Nickel Metal 4.8 batteries on my Spectrum 9100 RX with 3 satellite antennas.

In addition to the dual battery setup, I'm using the Fromeco DC UP (http://www.fromeco.org/Products/05FRCDCUP/Default.aspx ) plug in capacitor board that is suppose to curb the brown out problem ( I'm flying an expensive camera ship ).

Is there any problem with this setup and the jewel generator??

Mike

Cut - Print - It's a wrap!

08-22-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
rbort

rrProfessor

Franklin, MA - USA

My Posts: All  Forum  Topic

Jewel

Mike:
In addition to the dual battery setup, I'm using the Fromeco DC UP (http://www.fromeco.org/Products/05FRCDCUP/Default.aspx ) plug in capacitor board that is suppose to curb the brown out problem ( I'm flying an expensive camera ship ).

Is there any problem with this setup and the jewel generator??
To answer your question when I designed the Jewel, I experimented with different size capacitors and settled on a larger 4700uf cap. It pretty much does the same "buffer power" idea as the Fromeco system. In my case I was testing it at idle where the generator power is low and without a battery. With a larger cap, you get to idle the engine slower without having the servos start jumping around due to low power as the engine idles unevenly.

I'd say while you can use it I'd save it for another heli that doesn't have a Jewel on-board. With the Jewel you're not going to suffer any brownouts as you have dual power into the receiver - from the Jewel and from your battery.

Glad to hear everyone is happy with their units!

-=>Raja.

MA 1005 H280, 4060 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3140 flts
Whiplash V1 27 3DMax, 1320 flts
Whiplash V2 H300, 45 flts

08-23-2008 Over year old.
PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
Aaron29

rrProfessor

USA

My Posts: All  Forum  Topic

Now if only it would charge the transmitter...

J/K

I'll be buying one soon. What battery would you recommend using for Spectra G with the Jewel, 611, GV-1, 9252's? Plan on some hard (for a gasser) 3D with it. But mostly sport flying.

I'm guessing you probably need a battery that could do a couple flights without the jewel on? Just in case the generator decides to stop charging. You could finish the tank plus have some reserve on your battery.

Maybe I need to rethink the larger fuel tank, then. Since longer flight time means I'd need a bigger battery.

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
koal

Heliman

Calgary, Alberta- Canada

My Posts: All  Forum  Topic

Hi Raja, I just ordered a Bergen Intrepid and I would like to go with your system. I'll be using JR 8717s which are a pretty high draw digital. I'm also using the Spektrum receiver which apparently resets at approx. 3.5v. My concern was that with the relatively low voltage of the generator (compared to say a 7.4v system regulated down), I may be approaching that low voltage state with alot of servo activity.

Based on the above post, can I be confident with this setup? (I wasn't aware that your system incorporates a capacitor, I'm not very electronics savy !)

Brad

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
pgkevet

Key Veteran

Wales

My Posts: All  Forum  Topic

I'll be buying one soon. What battery would you recommend using for Spectra G with the Jewel, 611, GV-1, 9252's? Plan on some hard (for a gasser) 3D with it. But mostly sport flying.

I'm guessing you probably need a battery that could do a couple flights without the jewel on? Just in case the generator decides to stop charging. You could finish the tank plus have some reserve on your battery.

Maybe I need to rethink the larger fuel tank, then. Since longer flight time means I'd need a bigger battery.
I've got that setup ..even if I haven't got that ability. At the moment I'm flying 15 mins sports-type which I estimate would have another 10-12 mins time on my 16oz tank (30 pumps top-ups between flights. 20 pump turns drainage at the end of day).

When I was on just batteries than averaged 6-700ma per flight.

I've got a 4-cell 2600 NiHm pack on-board now with the jewel (one of the cheapest 4-cell nihms on ebay) and a second one in my pocket - 'just-in-case'.

I figure that gives me 2 safe flights on-board in case I have a dumb moment and forget to check and another couple of flights to avoid going home early if the Jewel fell off.

And in a best case scenario I can always fast charge my new tx's Nihm in the car

pgk

08-23-2008 Over year old.
PM  EMAIL  Attn:RR
Eury

rrProfessor

Nottingham NH

My Posts: All  Forum  Topic

Koal, I run that exact setup in my Spectra and fly it pretty hard without issue. I use a 1900scr pack with mine and I always land with the pack at 5.2 or so after taking off in the 4.9 range. The 8717s, Spektrum, and the Jewel are made for each other.

Nick Crego

Citizen #0168

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
BrunoBL

Key Veteran

Pomerode, SC, Brazil -26.71, -49.17

My Posts: All  Forum  Topic

It's definitely not a bling thing, in fact, I think it's ugly and stupid looking hanging out the top of my Spectra, it'd be a whole lot nicer if it weren't there. However, the functionality makes it 100% worth it.
It's not bling for sure, but OTOH is a great conversation starter!

When I was flying at a club, with lots of other fliers, most people would approach and ask "what is that thing". Some had a clue and asked "what is that brushless motor for". A few people even got imaginative and would ask if that was an on-board starter!

But seeing a working, on-board generator and learning about redundant and unlimited electrical supply plus no more Rx wall-charging would invariably blow people away. I can confidently say that my Spectra was the coolest heli at the club, thanks to Raja's Jewel. When on the ground, there was always a small crowd around the Spectra.

Now that I moved to a small city, my Spectra was promoted to the coolest heli in town! ...Oh, wait, it's the only heli in town!

Actually there is one other heli here... my T-Rex.


...Bruno.
Spectra G on Avgas 100LL, Jewel generator
T-Rex450SE V2
DX7

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
koal

Heliman

Calgary, Alberta- Canada

My Posts: All  Forum  Topic

Eury - Thats excellent to hear! Thanks for the input. Brad

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
Eury

rrProfessor

Nottingham NH

My Posts: All  Forum  Topic

It's not bling for sure, but OTOH is a great conversation starter!
I tell everyone that my Spectra is a hybrid, and at low loads the gas motor shuts down and the AXI powers it, and they both kick in when I'm pushing it. It's surprising how many people have believed me.

Nick Crego

Citizen #0168

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
rbort

rrProfessor

Franklin, MA - USA

My Posts: All  Forum  Topic

Battery

I'm guessing you probably need a battery that could do a couple flights without the jewel on? Just in case the generator decides to stop charging. You could finish the tank plus have some reserve on your battery.
Precisely. With the Jewel you get so dependant on it soon you'll totally forget about the battery and worrying how full it is. You'll want enough capacity as someday who knows the generator might stop working - for example the coupler gets loose - and you want enough capacity in the battery to finish the flight and buy you time to discover it before you fly it down too low. Asd someone else stated, gassers pull about 600mah per flight in my experience so a battery in the range of 1400 to 2200mah is a good choice. Stick to AA size as larger cells are heavier and you don't need the extra weight.

I use a 16oz dubro tank with my Spectra and 1005 and that gives me a 15 minute flight with reserve. Anything larger tank wise I think is too big as after 15 minutes of flying its a good time to take a break anyways.

Koal: With the jewel the voltage will never drop down to 3.5v in flight. Its regulated to 5.4v and should stay very close to that. With a 3 amp load on my triton charger on the jewel I can get it to drop to 5 to 5.1v but that is loss in the wire. If I check the voltage right at the regulator it is still 5.4v. PM me if you want more info.

By the way guys, I figured out the TX charge thing. I bought a solar cell from Ebay and mounted it to my TX case. With a diode and a couple of resistors, I regulated the charge current to 150mah in full sun, about 80mah in the shade. Put the tx in the case, plug it in (on the inside) and its charging back up while you're chatting with your flying buddies! I'll take a picture of it for you guys and post in my gallery along with the zimmerman rear muffler on Monday. And for those asking the rear zimmerman muffler actually helps with the CG as the heli is slightly noseheavy with the rear mounted engine and a CF tailboom which I put on mine. I did take a muffler spacer and cut it in half to space out the zimmerman pipe so it clears the canopy (j8 you'll need to do this). Still a close fit my canopy paint job melted slightly from the heat but its not so bad.

-=>Raja.

MA 1005 H280, 4060 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3140 flts
Whiplash V1 27 3DMax, 1320 flts
Whiplash V2 H300, 45 flts

08-23-2008 Over year old.
PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
Eury

rrProfessor

Nottingham NH

My Posts: All  Forum  Topic

Stick to AA size as larger cells are heavier and you don't need the extra weight.
Not good advice with the 8717s. The AA packs have too much internal resistance to deliver what the 8717s need, and will sag below 3.5 under load. I tested both the AAs in various capacities and the SCR pack that I went with, and the SCRs held the voltage up, the AAs did not.

Nick Crego

Citizen #0168

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
j.8

Veteran

Denmark

My Posts: All  Forum  Topic

".... I did take a muffler spacer and cut it in half to space out the zimmerman pipe so it clears the canopy (j8 you'll need to do this)....

I can`t visualize that one, but if you can cover that with
a pic on monday it would be appreciatet

Here is what I did with the couplers to prevent a slip,
drilled/taped two more holes in both couplers; it can
still happen though( never happend sofare), but to prefligth check the jewel,
for tigthness, is less trouble than not having one onboard

Regards Bo

08-23-2008 Over year old.
PM  EMAIL  GALLERY  Attn:RR
WATCH  6 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ] 14671 views POST REPLY
Hitec RCD ProModeler
 Print TOPIC Advertisers 

 21  Topic Subscribe

Tuesday, February 28 - 5:49 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies