rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 296 ONLINE 42 EVENTS SEARCH REGISTER  START HERE
 
6 pages [ <<    <     2      3     ( 4 )     5      6     NEXT    >> ]2036 viewsPOST REPLY
CanoMod . Futaba-RC . A Main Hobbies

.
.
Gasser Model RC Helicopters > Another plug reading thread?
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Congrats jschenck,, Sounds like you got it figured out,, You are probley right about your HS needing to get your engine in the rpm,, Can you change the gear ratio to something a little higer,, The stock GR on the Xcell 1005 is 6.43:1 and at 1950 HS the engine would be 12,577.5 Thats cruzin,, Very responcive and nice cyclics, If I were you,, I would try a differant GR to see if you like it any better,, The 6.28?? for the Predator at 1950 is 12,246 which is still a little low, for the engine, Is there anyway to change the GR without having to tear the heil down?? like a Main gear change?? Thats what I would try next... Again,, Congrats on tunning the engine, XGM/VGM

Oh... Happy Father's Day!!!!

Quote 
Also, I cleared the carb at the end of the day by pinching the fuel line while it was idling. The idea was to draw all the fuel out of the carb, minimizing the smell in storage. good idea or bad?

You can do the same thing by removing the inlet fuel line, and pumping your bulb till it's empty,, I would not run it till it dies,, your running it lean,, by doing it that way,, IMHO XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-15-2008 02:51 PM
HOMEPAGE  
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote 
Interesting to note that my jump test does create a throttle cut/burble in the first jump after a starting and a steady hover but then it's fine for the rest of the flight, even after hovering. It's almost like it has to clear it's throat from starting.

I don't know why, but mine everytime I go to do a roll for the first time cuts out while inverted,, but only on the first roll, after that, it never does it again,, When I talked to Ron Lund about this, years ago,, he told me to try a fast piro both directions before going up to do the roll, and it helps,, I guess there is a small air bubble traped inside some how, and that helps get it out,, I guess... That's the only way I know how to explaine it,, Try it next outting to see if it helps you out,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-15-2008 03:04 PM
HOMEPAGE  
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

The air bubble is what I thought too - It's like the first hard maneuver sucks an air bubble out of the carb somewhere. I'll try the piro trick.

My kids made me breakfast and gave me a card that says "you can go flying today" and "don't argue with mom" - funny stuff!

...yep...
06-15-2008 03:52 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote 
My kids made me breakfast and gave me a card that says "you can go flying today" and "don't argue with mom" - funny stuff!

I remember those day's!!! I just get phone calls now day's,, but that's good enought for me!!! Have a great day,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-15-2008 04:02 PM
HOMEPAGE  
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

xcellgasman

Quote 
don't know why, but mine everytime I go to do a roll for the first time cuts out while inverted,, but only on the first roll, after that, it never does it again

Did you install the Walbro felt clunk yet? If not do it as this got rid of the hickup on the first roll or flip for me. I tolerated that crap for quite some time until I got the walbro clunk and now it doesn't happen any more. NICE CLUNK!!!

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
06-15-2008 05:39 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Raja,, No I have not tried the walbro felt clunk, I have a regular clunk, with a 3/8 nut over the line and clunk for extra weight, I have been planning on getting one, but I forget, old age I guess... I will try to order one Monday from the link that you post the other day, as it was cheaper than the link I posted,, Can't hurt to filter the gas some more,,,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-15-2008 06:46 PM
HOMEPAGE  
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

I bought one but have not put it in yet. Not really looking forward to taking the tank apart - soon though.

btw, how do you guys keep the back plate from spinning when you are tightening down the screw to pinch the tank stopper?

...yep...
06-15-2008 07:33 PM
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Its an art!

Quote 
btw, how do you guys keep the back plate from spinning when you are tightening down the screw to pinch the tank stopper?

You need to tighten the screw just enough so it won't spin but loose enough so you can get it into the tank.

John, get that felt clunk and your carb will not hickup or be dirty again - no more "cotton ball" stuff on the final screen either!

OK guys, GET OFF the computer and go fly, will ya? I'm shutting mine down for now, my models need some fresh air and so do I, check back in tonight.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
06-15-2008 07:40 PM
 
 
pgkevet
Senior Heliman
Location: surrey UK

Quote 
btw, how do you guys keep the back plate from spinning when you are tightening down the screw to pinch the tank stopper?

On the Preddie the manual recommneds inserting a short length of the copper tube into the back plate of the stopper system and into a blank hole in the bung. If using an alternative bung system it should be possible to epoxy something through the back plate to grip bung..small nail or something just to grip??

pgk
06-15-2008 08:07 PM
 
 
AceBird
Elite Veteran
Location: Utica, NY USA

Quote 
On the Preddie the manual recommneds inserting a short length of the copper tube into the back plate of the stopper system

All three holes in the bung should be plugged with something because leaving them void can create a leak. When the rubber is expanded in the neck of the tank in may cave into the voids and form a groove like a butt crack. Tubes mounted through the bung prevent this from happening.

Ace
What could be more fun?
06-16-2008 02:01 AM
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

Well I searched a radius of about 3 miles and made some phone calls, couldn't find Amsoil anywhere - so I used some BelRay H1R. I mixed a gallon with about 3 1/2 oz. I want to go to 3.2oz once I'm comfortable but put a bit extra since it's my first gallon with this oil

Finished off the last of my Lawnboy fuel, temps were in the 220's. So I filled it up with the H1R fuel, a bit of the Lawboy was still in there, not much. Did some easy hovering for a few minutes then checked the temp - 185F !! I couldn't believe how much cooler the engine was! So I did about 15 minutes of easy flying circuits. landed and once again mid 180's!

Does the oil make THAT much of a difference?! Glad I didn't mix up another gallon of lawnboy, almost did. Now I have to go through and tune for this fuel. Am I OK tuning after a couple of tanks with this oil?

Y'know I was thinking about the oil ratio. It's tough to be exact. You can measure the oil down to the gram but how do you get the gas volume right? How accurate are the gas station pumps? Would be nice to have a gallon container marked with exactly 128oz.

Maybe I'll have some time to put the felt clunk in this week.

...yep...
06-16-2008 04:20 AM
 
 
Billme
Key Veteran
Location: MS

Yes, oil makes a big difference..Stick wwith the same oil from now on..

I have a two gallon can, and made a mark at the one gallon level...I just trusted the first gallon on the pump to make the mark, and thereafter have something to gauge by...
Bill
06-16-2008 01:31 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

I took some flack the last time I talked about this, but I use a one gallon nitro bottle to get my gallon of fuel, you could use a regular gas can get your gas, then pour it into the nitro bottle to the mark of one gallon, then mix up your fuel. I think the gas pumps are pretty close, they have to be measured about every few months or so from the Feds, they show up with there little gas can and do testing on the pumps around here,, Like Raja said,in the other post., why pour gas into another container, just use your gas can,(your legal, and safe) and mix the oil in it, and be done,, XGM/VGM

Pretty cool how differant oils will make differant temps.. Sorry you couldn't find Amsoil locally. But that's all I have ever used,, And it does well after useing Lawn Boy for break-in,, Smooth transtition, from one oil to the other,, Well Congrats, sounds like your well on your way to enjoying the gasser,, Now lets see some more video of your Predator rocking!!!!

John Crotts
www.soonerhelicamproductions.com
06-16-2008 04:50 PM
HOMEPAGE  
 
 
AceBird
Elite Veteran
Location: Utica, NY USA

Quote 
Y'know I was thinking about the oil ratio. It's tough to be exact. You can measure the oil down to the gram but how do you get the gas volume right? How accurate are the gas station pumps?

How exact do you have to be? You don't need to be exact. You need to be constant so your own mixture ratio doesn't vary between batches. Just think of all the ratios being used successfully by different modelers using the same engine.

I purchase gasoline in quantities of 5-15 gallons and much of it is for a four cycle engine so I naturally transfer my mixing to a one gallon container. When I was using Camper fuel I had different mixes for the heli and the gardening tools. Now they can be the same.

Ace
What could be more fun?
06-16-2008 05:50 PM
 
 
aambrose
Elite Veteran
Location: Pana, IL

Very interesting thread. I just found it today.

I have gotten to know Bill and John very well over the last week or so. These guys will not steer you wrong. I've talked to both of them in the past but they have helped me tremendously over the past week breaking in a new G260PUH in our GSR. So far I have just over a gallon through it using Lawnboy. I had to order the Amsoil Saber from Amsoil's website but had it in about 2 days since they had a distributor nearby.

As for measuring accuracy, I was concerned about this too. In the past I just trusted the gas station pump and trusted my measuring cup for the oil. I decided to measure a little more accurately this time so I took a 1 gallon pitcher and measured 128 oz. of water into it. I made a mark on the pitcher then dumped the water and obviously made sure it was thoroughly dry before pouring gas into it (at home). The "gallon" from the station turned out to be about 132+ oz. Also, I noticed the gas had some small black specks in it when I poured it into the pitcher. Upon pouring it into the can, I used a coffee filter in a funnel to catch the specks. I think I may make this a standard procedure from now on even though the gas is filtered before it leaves the can. I also measured the oil with a syringe type device and squirted it into the same measuring cup I've been using. It came out very close so I trust the cup.

Is this the felt clunk you guys are recommending?
http://us.vario-helicopter.biz/shop...oducts_id=33302

Again, Bill and John have been a huge help to me! I trust these guys because I trust people who have been doing it with success for many years.

Thanks!


Tony
06-16-2008 06:38 PM
HOMEPAGE  
 
 
Billme
Key Veteran
Location: MS

I'm not that accurate, but I look at it as mixing epoxy.. Yep, that look good enough, hehe..

Since you have mention about gas at the gas station...You always get crap from a pump, period...It builds up quick, this is the reason I change out the fuel filter on my vehicles every year...

Run a pickup filter in your fueler tank, and 1 paper filter pass the pump is what I do...
Bill
06-16-2008 07:17 PM
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

This is the one I got:

http://www.ronlund.com/Merchant2/me...t_Code=MA125-24



...yep...
06-16-2008 07:35 PM
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

jschenck - That is NOT the good one

I had issues with this exact clunk - not felt but more like ceramic that clogs up especially in cold weather. I use the felt clunk, search for it here I've posted the link several times.

As far as mixing the gas, I have a measuring cup that I pour the oil into for mixing. Then I use the remaining gas in my gas can to wash out the oil by pumping in fuel on top of the oil and pumping it back out into my gas can. Repeat for several iterations and the plastic cup will be clean with no oil left in it, then take the gas can to the gas station and add gas as needed.

I don't always mix 1 gallon. Sometimes it can be a gallon and a 1 1/2. Depends on how low my gas is in my can and what event I'm going to. Just use the same measuring cup all the time, adjust the oil in there and trust the gas station pump to be close.

Good enuf for me!

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
06-16-2008 08:22 PM
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

rats - we need to let RHPS and MA know so they'll stop selling these.

...yep...
06-16-2008 08:29 PM
 
 
aambrose
Elite Veteran
Location: Pana, IL

Raja,
Are these the same? If so, big price difference!

http://www.mowtownusa.com/m5_view_i...OgcCBBJZ7FDl7-K

http://us.vario-helicopter.biz/shop...oducts_id=33302

Thanks!


Tony
06-16-2008 08:41 PM
HOMEPAGE  
 
 
6 pages [ <<    <     2      3     ( 4 )     5      6     NEXT    >> ]2036 viewsPOST REPLY
Boca Bearings . Modefo's RC Helicopters . XHELI.COM

.
.
Gasser Model RC Helicopters > Another plug reading thread?
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Friday, September 5 - 10:07 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie