Gas Engines Questions or comments about gas engines can be posted here

RCGF Engines

Old 11-28-2011, 08:57 PM
  #5726
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Hey WBG,

That all looks very good. I am sorry that I did not share this with you guys before. I use a piece of aluminum plate to build the holder because the wood will allow the front bolts to come loose on your engine. I can't wait to see the finished plane!!

Captmicom
Captmicom is offline  
Reply With Quote
Old 11-28-2011, 09:09 PM
  #5727
bcchi
 
Join Date: Jan 2006
Location: riverton., WY
Posts: 975
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines


Quote:
ORIGINAL: aussiesteve


Quote:
ORIGINAL: airtime82

How can you tell if the engine you have is in timing when you get it?
If you got it through a decent dealer, it will have been checked. If you didn't get it through those means.
Check that it is firing somehwere between 25 - 30 degrees BTDC. (28 is ideal but a couple of degrees either way is not going to make one iota of difference to the final outcome).

For a quick and dirty test

Find TDC by looking at the piston through the exhaust port. - mark a pencil line across the prop hub and the crankcase at this point.

Method one for finding the right firing point
Get a strip of paper and wrap it around the prop hub. Cut it so it is exactly the length of the hub circumference.
Get that piece of paper and cut it in half - discard one half.
Get the piece you kept and cut it in half again - discard one half.
Get the reamianing piece and cut it into a 1/3 length - discard the 2/3rds length.
That last peice you kept is now ''30 degrees'' long. Make a mark from the exisiting mark on the hub to the length of that paper before TDC (to the left of the mark looking from the front of the engine.

Method 2 for finding the firing point.
Measure the diameter of the prop hub and muliply it by 0.244 - that is the 28 degree length. use that measurement to amke the BTDC mark.

Now power up the ignition, and listen to the spark plug cap - it will make a ''crack'' noise when it fires. Do it slowly and don't overdo it. There is no need to have a spark plug in there for this test as the occassional use of it this way woun't hurt a thing.

Now you will most likely have discovered that the timing is way out - go dril some new mounting holes for the sensor screws or start filing the senso slots to get the sensor to the right place as my experience has been they are either close enough or a long way out.
O-No-Not the paper thing again,works LOL
BC(AMA 2500).
bcchi is offline  
Reply With Quote
Old 11-28-2011, 10:26 PM
  #5728
Warbirdguy
 
Warbirdguy's Avatar
 
Join Date: Jan 2006
Location: Wartrace, TN
Posts: 601
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Cap, yeah I thought of that. I used quality aircraft ply. I plan on also using some flat washers and some blue locktight. I though about aluminum or even steal, but, the thought of that wire rubbing against the metal just sent chills through my body lol. I think they will be ok. Not much different than the bolts that go through the firewall if its done right, I think it will hold up. If not, can always change fairly easy in the future. Thanks for sharing your idea though.

Ill keep you posted Going to start putting the thing all together next week. Have all the sub structures finished.
Warbirdguy is offline  
Reply With Quote
Old 11-28-2011, 10:34 PM
  #5729
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

WBG,

I can't wait to see it!!
Captmicom is offline  
Reply With Quote
Old 11-29-2011, 06:59 AM
  #5730
Whistling Death
Thread Starter
 
Whistling Death's Avatar
 
Join Date: Feb 2006
Location: Alexander City, AL
Posts: 2,584
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines


Quote:
ORIGINAL: WindGap

I've seen them post the 40cc twin now.
http://www.bphobbies.com/view.asp?id...9&pid=F3693948

And video is alread posted online.
http://www.youtube.com/watch?v=HYPascJ62aQ

I'm truly interested in this engine...it's performance and reliability. Now to find an airframe for it....
Yea it looks like RCGF has been reading the forum. There was a thread a while back with a few of us begging someone to make a 40cc twin. This is a great candidate for the ESM 70" warbirds with round cowls.
Whistling Death is offline  
Reply With Quote
Old 11-29-2011, 07:37 AM
  #5731
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Hey Blake,

Not sure it will fit in the 70" planes because of the plug angle. Plug hole to plug hole is 7.5” plus two times 5/8” for the plugs and CDI caps comes out to 8.75” might be a good fit for one of the 85” war birds though.

Captmicom
Captmicom is offline  
Reply With Quote
Old 11-29-2011, 09:52 AM
  #5732
Whistling Death
Thread Starter
 
Whistling Death's Avatar
 
Join Date: Feb 2006
Location: Alexander City, AL
Posts: 2,584
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines


Quote:
ORIGINAL: Captmicom

Hey Blake,

Not sure it will fit in the 70'' planes because of the plug angle. Plug hole to plug hole is 7.5” plus two times 5/8” for the plugs and CDI caps comes out to 8.75” might be a good fit for one of the 85” war birds though.

Captmicom
That is unfortunate. For me, a 40cc twin isn't a good candidate for an 85" warbird. Their 50cc twin would be a better choice considering the 8" OD and angled plugs.
Whistling Death is offline  
Reply With Quote
Old 11-29-2011, 10:55 AM
  #5733
mamethot
 
Join Date: Mar 2007
Location: St-Philippe, QC, CANADA
Posts: 7
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Anyone has an opinion about putting the twinn 40cc in a Top-Flite Stinson Reliant?

Thanks!
mamethot is offline  
Reply With Quote
Old 11-29-2011, 12:29 PM
  #5734
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Yup it would look good too!! I started asking RCGF for a twin 40cc, a twin 30cc, a twin 12xcc, and a twin 180cc about two years ago give or take. We will need to see how the 40cc sells before a 30cc comes along is my guess.

Captmicom
Captmicom is offline  
Reply With Quote
Old 11-29-2011, 12:48 PM
  #5735
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

If you are talking the 108" model it would be a good combo. Just need to make sure that it will fit.

Captmicom
Captmicom is offline  
Reply With Quote
Old 11-29-2011, 01:35 PM
  #5736
mamethot
 
Join Date: Mar 2007
Location: St-Philippe, QC, CANADA
Posts: 7
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Yes that model.

Cowling is 9 3/4 (prolly more 9 1/4 where the cylinders would be) . Engine is 200mm wide (7" 7/8) from base of spark plug to base of spark plug.
mamethot is offline  
Reply With Quote
Old 11-29-2011, 01:56 PM
  #5737
WindGap
 
Join Date: Aug 2010
Location: Irmo, SC
Posts: 228
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Quote:
ORIGINAL: Captmicom

Hey Blake,

Not sure it will fit in the 70'' planes because of the plug angle. Plug hole to plug hole is 7.5” plus two times 5/8” for the plugs and CDI caps comes out to 8.75” might be a good fit for one of the 85” war birds though.

Captmicom
U sure caps and plugs are simply 5/8"x2 more? Is there a trick to shorten the overall width as possible to fit it into planes designed for 30cc?

Guess, the biggest question is, which planes will this engine fit in? Aerobatic planes, I can only think of EF 78" extra or great planes yak 54 3d. What else?
WindGap is offline  
Reply With Quote
Old 11-29-2011, 06:02 PM
  #5738
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Hey Windgap,

That is the $64,000.00 question. I just measured one of our 30cc/26% YAK54s and the cowl at the fuse is 8.75” wide. I did re-measure the top of a 20cc “oops!!” It is 1.25” not 5/8”. I am very sorry for the FUBAR. The 5/8” is for the angle plug clearance. Anyway it will most likely whined up being used in scale apps is my guess.

Captmicom
Captmicom is offline  
Reply With Quote
Old 11-30-2011, 06:57 PM
  #5739
acerc
 
acerc's Avatar
 
Join Date: Sep 2006
Location: The Sunshine state, when it's not raining!
Posts: 8,108
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Got a preview of the 40cc twin. This is what I'm going to put in my new Waco. Should sound good with pitts mufflers as well. Hope BP don't mind my posting it. They said it would be on their site tomorrow. Enjoy
acerc is offline  
Reply With Quote
Old 11-30-2011, 07:21 PM
  #5740
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

This is what my bata unit looked like. There have been some changes for sure. I have tryed to post two photos so here goes!!

Captmicom
Attached Thumbnails
Click image for larger version

Name:	Ig11219.jpg
Views:	27
Size:	111.6 KB
ID:	1693637   Click image for larger version

Name:	Aw70189.jpg
Views:	17
Size:	75.6 KB
ID:	1693638  
Captmicom is offline  
Reply With Quote
Old 11-30-2011, 07:26 PM
  #5741
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

One more thing, for some reason the mufflers don't look right. I can't put my finger on it.
Captmicom is offline  
Reply With Quote
Old 11-30-2011, 08:34 PM
  #5742
FOOPED
 
Join Date: Oct 2008
Location: MIDLAND, TX
Posts: 473
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Yes I tried to picture the mufflers swaping sides and/ or turning them around ,but to no avail. UMMMMM [:@]
FOOPED is offline  
Reply With Quote
Old 11-30-2011, 09:19 PM
  #5743
Warbirdguy
 
Warbirdguy's Avatar
 
Join Date: Jan 2006
Location: Wartrace, TN
Posts: 601
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

how about only 1 bolt holding each one on lol. Unless its well hidden somewhere I dont see. I also think they should have staggard them so the stacks line up equally across from each other. Just my view

WBG
Warbirdguy is offline  
Reply With Quote
Old 11-30-2011, 11:54 PM
  #5744
TimBle
 
Join Date: Apr 2010
Location: Cape Town, SOUTH AFRICA
Posts: 2,744
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Hmmm, Its a little too wide across the spark plug caps to fit into my BH FW 190..
TimBle is offline  
Reply With Quote
Old 12-01-2011, 05:33 AM
  #5745
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Hey Wild Man the shafts finally got here yesterday. PM me your mail address and I will get it out to you ASAP! BTW they are 9.95mm so there must be more then one place making them.

Captmicom
Captmicom is offline  
Reply With Quote
Old 12-01-2011, 05:38 AM
  #5746
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

The other one is inside the down pipe that way when it falls out it makes a cool sound before exiting the aircraft.

Captmicom
Captmicom is offline  
Reply With Quote
Old 12-01-2011, 05:59 AM
  #5747
acerc
 
acerc's Avatar
 
Join Date: Sep 2006
Location: The Sunshine state, when it's not raining!
Posts: 8,108
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Yea the pipes kinda suck, but I never use stock one's anyway. Would have new one's made with the headers coming into one muffler.
acerc is offline  
Reply With Quote
Old 12-01-2011, 06:55 AM
  #5748
Captmicom
 
Join Date: Jul 2006
Location: Sierra Vista, AZ
Posts: 415
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

Steve pointed out the problem. One of them is backwards. The pipes should not stick out past the firewall.

Captmicom
Captmicom is offline  
Reply With Quote
Old 12-01-2011, 07:15 AM
  #5749
Whistling Death
Thread Starter
 
Whistling Death's Avatar
 
Join Date: Feb 2006
Location: Alexander City, AL
Posts: 2,584
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

That is very odd. They could have used the same muffler for both sides and it would have been just as close. All that did was add extra time and money to modify an extra muffler.
I looked at the muffler again and I believe it is installed backwards. If turned around it wouldn't interfere with the firewall.
Whistling Death is offline  
Reply With Quote
Old 12-01-2011, 07:46 AM
  #5750
acerc
 
acerc's Avatar
 
Join Date: Sep 2006
Location: The Sunshine state, when it's not raining!
Posts: 8,108
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCGF Engines

If I'm not mistaken that plate is in place of the dog ear's, which is better and it still require's stand-off's. Which according to their website stand-off's come with it.
acerc is offline  
Reply With Quote


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 09:18 PM.