rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 730 ONLINE 26 EVENTS SEARCH REGISTER  START HERE
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]1048 viewsPOST REPLY
Autography FlightPower . Advantage Hobby . Revolution Models

.
.
Vario Sky Fox - Benzin - Evolution - Xtreme > Rossi 65 head shims
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

OK, no more ads for my Sky Fox, after offering it for half the new price with only 2 hours on the clock and getting not one offer, I have decided its future lies with me. I'm putting it back together (was dismantled for shipping) and will it again as soon as I get some more servos.
The Rossi 65 I am using is very hard to turn over with my starter or any of the starters we have tried, the only way to get it running when cold is by loosening the plug and then re-tightening when it is running, then replacing the Rx, canopy, get to the flight line before it cuts...thankfully it has a BIG tank!

After a couple of flights I added the one head shim that came with it which seemed ot make no difference at all! How many do people run on these big Rossis? I am using straight fuel, 15% oil, as recommended by Vario Germany.

By the way, I have come to the conclusion that Vario in continental Europe are rather like X Cell in the USA, very popular on the home market but not so much overseas, the Americans view X Cells as relatively inexpensive and Varios as expensive luxuries, whereas over here it is the other way round! A basic Sky Fox here costs about the same as a Raptor 60, a 60 size Fury costs about double that. The spares situation is also similar, I can get anything in a few days from Vario, but my friend who flies X Cell had to buy up all the stock from a former importers to be able to keep his helis in the air!

David S., Kouvola, Finland
03-07-2003 Over year old.
HOMEPAGE  
 
 
Naomi
Elite Veteran
Location: Ontario, Canada

Good decision. stick with it.. you won't regret that.

Naomi
03-07-2003 Over year old.
HOMEPAGE  
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Well, I have a friend learing to fly with a pair of 60 size X Cells and I keep thinking I have a complete model that size sitting in a box! I hate to have models from lots of different manufactureres, so if the Sky Fox lives up to its promise this year, maybe another Vario can join it next year.

David S., Kouvola, Finland
03-07-2003 Over year old.
HOMEPAGE  
 
 
mdu6
Veteran
Location: Montreal

Hi,

I'm also running a R65 in a Vario Evolution.
It's important to note that the head shims are not meant to reduce compression for starting purpose, but rather if your running with anything above 7.5% Nitro (This can vary also depending on the climate).

I'm having no problems in starting this engine. I'm running 0% nitro, 19% oil (this I will slowly reduce to around 15-16). I'm using a Vario starter with a good battery. I think I might have flooded this engine only once during the last year, and on the contrary I find it takes a bit of spinning before I get the fuel coming in (This is easy to ear).

Maybe this difference comes from my running 19%oil, hence a "thicker" mix ?
03-07-2003 Over year old.
 
 
East Coast Scale
Key Veteran
Location: Taxachussetts

I installed three .30 shims in the head of mine, and am running 15% with no problem. it is actually the best running rossi i have ever had.
Joe
03-07-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

My problem is simply getting it to turn over when cold. I have a BIG and well-charged 12v battery (65AH) and neither my Sullivan or any of the other starters we have tried can turn it over, cold, with the plug in. Vario suggested the shims, one made little difference, so I have more on the way! I will continue to use straight fuel as this is one of the main benefits of using the Rossi; nitro is expensive here.

David S., Kouvola, Finland
03-07-2003 Over year old.
HOMEPAGE  
 
 
East Coast Scale
Key Veteran
Location: Taxachussetts

If you are not using the hex adapter in the skyfox, and are trying to start it using the rubber insert in your starter, that is a mistake also. The hex drive puts more power right to the motor.
Joe
03-08-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Joe,

Spot on, as always with the Vario questions! I am using a standard starter with rubber cup, not a hex adaptor. Do you have the part number for the adaptor? I assume it will need a hex starter wand with a freewheel? Of course, I have a hex starter extension for my Raptor and Ergo, and of course, it doesn't have a freewheel! And again, of course, I ordered parts form Germany YESTERDAY and they are on the way, so it will need another order. But the Rossi was such a pig to turn over last year that I barely flew it.

Thanks for the advice.

David S., Kouvola, Finland
03-08-2003 Over year old.
HOMEPAGE  
 
 
East Coast Scale
Key Veteran
Location: Taxachussetts

The hex starter with the freewheel is 64/46. That has a 100mm shaft. You can also get the 150mm shaft, but that is if you have a starter really buried high in a fuse such as the NOTAR helis.
Joe
03-08-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Thanks, looks like another package will soon be on its way from Gräfendorf!

David S., Kouvola, Finland
03-08-2003 Over year old.
HOMEPAGE  
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Package from Gräfendorf arrived today, ordered Friday! One very good reason for me to stick with Vario. I'll stick an extra head shim in tonight and carry on rebuilding the Sky Fox. Need some more servos before I can fly it again, though.

David S., Kouvola, Finland
03-10-2003 Over year old.
HOMEPAGE  
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Noticed some references here to 'thick' and 'thin' shims for the Rossi. Got my shims last night and checked, they are all .1mm thick, I have used four, hope that is enough to get the engine to turn over without loosing too much power. Vario recommended taking one or two out once the engine is run in.

David S., Kouvola, Finland
03-11-2003 Over year old.
HOMEPAGE  
 
 
East Coast Scale
Key Veteran
Location: Taxachussetts

My shims total .9mm. But i am using 10% nitro. I figure after a couple of gallons, i may pull one out..
Joe
03-11-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

So my .4mm shoud be OK with straight fuel? It's not a big job to add more (one more, anyway, then I'm out of shims!) but I have to remove the front radio tray and a couple of frame joiners, plus the front U/C to get at the head.

David S., Kouvola, Finland
03-11-2003 Over year old.
HOMEPAGE  
 
 
East Coast Scale
Key Veteran
Location: Taxachussetts

Dave
I would add the last shim you have and try it. That should work fine with the 0%.
Joe
03-11-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Drat, just got the engine back in and the frames back together! Oh well, practice makes perfect, back to the worskshop!

David S., Kouvola, Finland
03-11-2003 Over year old.
HOMEPAGE  
 
 
Jarno
Veteran
Location: Finland

Dave,

How's your tweaking going on? I'm fixing my PC at the moment to get it ready for some flying, hopefully this weekend if the weather stays nice.

Good to hear that you decided not to get rid of your Skyfox. It's a fine heli! I'm looking forward seeing it at helimeetings

Cheers
Jarno

Jarno
03-11-2003 Over year old.
HOMEPAGE  
 
 
mdu6
Veteran
Location: Montreal

I'm running without any (additional) shims at 0%.

The additional shims are really needed if you are using anything higher than around 7.5% (also depends on outside temperature).
03-11-2003 Over year old.
 
 
FinnDave
Elite Veteran
Location: Kouvola, Finland

Jarno, I hope you'll see it this year, I need to find out what's on!

MDU - I was advised to use some shims while the engine is new by the Vario factory, even with zero nitro fuel.

David S., Kouvola, Finland
03-11-2003 Over year old.
HOMEPAGE  
 
 
dstuber
Heliman
Location: alberta

you could also try turning the fan by hand first. move the piston to TDC then try starting it. i have a wimpy tower hobbies starter with the rubber cup. it won't budge the motor but if i move the piston to the top of its stroke it turns over easily. must be momentum or something
03-14-2003 Over year old.
 
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]1048 viewsPOST REPLY
CarbonXtreme . Midland Helicopters . HeliProz

.
.
Vario Sky Fox - Benzin - Evolution - Xtreme > Rossi 65 head shims
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Thursday, October 16 - 1:03 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie