stunthanger.com

Engine basics => Engine set up tips => Topic started by: Gordon Tarbell on March 30, 2012, 07:32:32 PM

Title: FP 20 tune up parts
Post by: Gordon Tarbell on March 30, 2012, 07:32:32 PM

OK I got two nib FP 20's one abn, one iron piston. They are both RC carb equipped. Are the stock NV and venturi still available are there any subtitues that will work equally as well. Is it Ill advised to make my own venturi and use NV from some other app. If I make my own ,what size to ream it and what dia. needle valve?I want to make these run in the famous BBTU/Dan mode. Romper stomper, bomper Boo . Tell me, tell me, tell me true. Got two Sky rays going togeather now , one modified kit, the other from scratch(traced from kit).

Title: Re: FP 20 tune up parts
Post by: Bill Little on March 30, 2012, 07:55:30 PM

Hi Gordon,

As I am sure you have read, to get the BBTU run you use all stock parts.  I have recently got the stock NVA and venturi from Tower.  It is essential to use the stock 2030 muffler.  The 2030 is supplied with the LA .25 so they are still available.

Just set it up stock and run as Brett suggests.  Altering parts of the system can lead to just a regular old .20 running at high rpm with a low pitch prop.

Bill

Title: Re: FP 20 tune up parts
Post by: Gordon Tarbell on March 30, 2012, 09:37:37 PM

OK, so I need to call tower and get the original parts. I will call tomorrow and find out how much $$ and if it is still available. I already have one muffler I borrowed. these things came with a non 2030 muffler( 842 I think) .

Title: Re: FP 20 tune up parts
Post by: Geoff Goodworth on March 31, 2012, 01:58:10 AM

Gordon, the Tower numbers are:

Muffler    LXCC15
NVA        LXCR49
Venturi   LXCW99

Cheers   H^^

Title: Re: FP 20 tune up parts
Post by: Andrew Tinsley on March 31, 2012, 09:04:23 AM

Don't forget that Dan Rutherford (he of the gospel telling, re the BBTU) says you should use the 3oz (I think) Haynes plastic R/C tank as an essential part of the BBTU. I use it, although I am not sure how essential this is. Now wait for Dan to strike me down with lightning.

Regards,

Andrew.

Title: Re: FP 20 tune up parts
Post by: Kim Mortimore on March 31, 2012, 03:43:42 PM

Gordon,

Tower also sells the Hayes 3 oz tank, number LXK826.  Both local clubs I fly with have had great results with this tank and FP20s.  Hope this helps.