List updated Phil.

These and the ST35 will be getting priority after the current run of 160 x OS61VF are done.

Brian

Quote from: phil c on September 09, 2022, 05:58:56 PM
I've been asked again if I would do a run of Fox 36 Mk 4-5.

Again, I'm happy to do these if there are enough numbers. WE HAVE ENOUGH NUMBERS

They will be stock Mk V timing and include piston/liner/rod/pin/head shims/backplate gasket.

Also doing Tyndal double bubble head buttons to suit stock long reach plugs, and also Nelson head buttons. So let me know if you want either or both.

Piston/liner/rod/pin/shim sets will be approximately $115 to $125 Australian dollars. Don't know what the head buttons will be $.




Brian

i=
I'd like 2(two) piston liner assemblies and 2 of each head: Tyndal long reach,  Nelson plug version

Thanks Brian
Phil C

Getting closer fellas.

Not forgotten.


Brian

Hello

Nice to know you are still making Fox 36 parts but wonder will mk4 and 5 sets fit a mk6?
If the Mk 6 is different is it a possible for the future?
Thanks
Regards Gerald

From memory the MK6 is different. I think it was AAC too.

Yes it's possible for the future (but only as ABC) if there is enough orders for it.

Brian

Quote from: GERALD WIMMER on April 28, 2023, 04:16:49 AM
Hello

Nice to know you are still making Fox 36 parts but wonder will mk4 and 5 sets fit a mk6?
If the Mk 6 is different is it a possible for the future?
Thanks
Regards Gerald

Hello Brian

Thanks for your reply , it would be great if we could get some Mk6 P/C sets made , how many orders would you need?

Think the Mk6 was steel on the very early ones but most were ABC , while the Mk7 was only AAC but had problems so people retrofitted the ABC sets from the Mk6.

Regards Gerald Wimmer

Quote from: Brian Gardner on May 01, 2023, 02:20:14 AM
From memory the MK6 is different. I think it was AAC too.

Yes it's possible for the future (but only as ABC) if there is enough orders for it.

Brian

MkIII, MKIV, MKV, and MKVI can all use the same piston, liner, rod, and wrist pin. MKVII is a whole different animal and nothing interchanges

These are ready guys.

I'll start contacting everyone on the list and begin shipping out. Bear with me - I'm insanely busy trying to keep up with this and my wheelchair basketball commitments both on court 4 times a week and also on numerous committees managing teams and organising tournaments, funding grants, charity fundraisers etc.

Brian

  I got my order and Brian's work is excellent as in the past. The thing that I'm not too thrilled about is the Tyndall double bubble head inserts. These inserts have a very large combustion chamber. In my opinion, you will have to really tip the nitro can to get power almost like a Nelson 36. This will also cut down on the overall run time per oz of fuel used. I think a better head design would have been to copy the Nelson 36 double bubble head that has a much smaller combustion chamber, and would produce a high-power output with only 10% nitro and is a proven design. I would be in if Brian would made them.
Al

Al, That is what Dick Tyndall noted in the first page of this thread.  He ran 30% nitro with those heads which is what they were designed around. 

Lane

Quote from: Al Ferraro on August 14, 2023, 05:25:55 PM
  I got my order and Brian's work is excellent as in the past. The thing that I'm not too thrilled about is the Tyndall double bubble head inserts. These inserts have a very large combustion chamber. In my opinion, you will have to really tip the nitro can to get power almost like a Nelson 36. This will also cut down on the overall run time per oz of fuel used. I think a better head design would have been to copy the Nelson 36 double bubble head that has a much smaller combustion chamber, and would produce a high-power output with only 10% nitro and is a proven design. I would be in if Brian would made them.
Al

Did you set it up and run it? The Fox uses way less fuel per minute than the Nelson already and I thought you guys were all about the Nitro. If you're dead set on trying a smaller chamber, you can buy a "Blank" from Henry (for $10-12) that has the plug seat, pilot hole, and threads machined and chuck it up in the lathe and make any chamber you want. Keep in mind the Fox case, Rod (including your new one), and crank are not nearly as rigid as the Nelson

If people want a copy of the nelson chamber I can do that if the orders are there.

Quote from: Al Ferraro on August 14, 2023, 05:25:55 PM
  I got my order and Brian's work is excellent as in the past. The thing that I'm not too thrilled about is the Tyndall double bubble head inserts. These inserts have a very large combustion chamber. In my opinion, you will have to really tip the nitro can to get power almost like a Nelson 36. This will also cut down on the overall run time per oz of fuel used. I think a better head design would have been to copy the Nelson 36 double bubble head that has a much smaller combustion chamber, and would produce a high-power output with only 10% nitro and is a proven design. I would be in if Brian would made them.
Al

             I haven't tried the Nelson head yet. I'm using the stock head button currently and I'm very impressed with my engine. Looking forward to using it soon.

  When I first started making the double bubble inserts for the Fox MKIII and MKIV engines in the late 1970's I was shooting for more performance without throwing gobs of nitro in the engine and having it self destruct in a short period of time. Just being 4 or 5 MPH faster than the other guys was good enough for me and keeping the engines in one piece was a good thing. At the 1983 NATS, Rich Lopez stated in his Combat article in Flying Models magazine that " Tyndall and ( Steve ) Kott seemed to have the fastest airplanes"  ( I also built Steve's engines ) . I personally had to agree with him. Steve finished 3rd and I finished 5th out of 42 contestants. Note that this was before Henry made any .36 engines if I'm not mistaken. Henry's engines , when they came out, made everything else obsolete ( in my opinion ). When this happened I was not flying airplanes anymore I was racing R/C boats ( I still am ). Duke Fox never made a .36 combat engine that was anywhere close to Henry's engine ( Sorry Duke; just my opinion ).
   Long story short: I started making the double bubble inserts and stopped making them long before the Nelson .36 came out.

                     Dick Tyndall
                     Virginia Craftsman

Quote from: Brian Gardner on August 19, 2023, 02:05:45 AM
If people want a copy of the nelson chamber I can do that if the orders are there.

Thanks Brian, I would take 6 Nelson chamber head buttons.
  I have a few Fox MK7 that I run on different type models. One of them is on a Fast combat model, 540sq.in.Wakkerman. Using Power Master GMA 10 nitro my Fox MK 7 pulls it 119 MPH with out a streamer, and yes it uses a lot of fuel. I'm using a Nelson plug and style head chamber that I made, and with some other mods that gave me the extra power. The bottom of the plug is only .135 from the bottom of the squish band. This is no BS as many people has witnessed my Mk7 in action.

  I'm impressed. Your Fox MKVII is 3MPH SLOWER than my MKIII engines that I ran 40 years ago. If I had wanted to run 10% nitro fuel, I would have run the head clearance down to around .008, put on a prop with a little less pitch and a hotter glow plug. It would probably still run close to 120MPH, but might be a little tougher to pull a streamer.
   If you want to go fast, buy a Nelson. One just sold on Ebay for $1,901.

                   Dick Tyndall

Quote from: Dick Tyndall on August 20, 2023, 08:45:23 PM
  I'm impressed. Your Fox MKVII is 3MPH SLOWER than my MKIII engines that I ran 40 years ago.

                   Dick Tyndall

How about 6 MPH FASTER WITH A FOX 36x BB in a 19 oz model with official time keepers!
Al

Al, at what speed are you guys going to .018"


MM

Quote from: Al Ferraro on August 21, 2023, 09:35:33 AM
How about 6 MPH FASTER WITH A FOX 36x BB in a 19 oz model with official time keepers!
Al
[/q Small airplane, thin airfoil, a BAD ASS Scarinzi engine, 50% nitro, .015 lines, been there, done that. Not something that I would fly for a season of combat competition.
   You win, okay?

                  Dick Tyndall

   If you want to go fast, buy a Nelson. One just sold on Ebay for $1,901.

                   Dick Tyndall
[/quote]
  FYI, I own 6 Nelson 36 and the new Fora 36 and my Fox MK7 is just as strong as them. I even did a combat match Fox MK7 vs Nelson, same plane, prop, and fuel. Both planes were exactly the same speed.
Al
Heads attached, The Nelson is a complete head

   Good for you. Now go bad mouth someone else's 45 year old product that doesn't compare to the latest and greatest thing out there.

                             Dick Tyndall   

I don't think Al's comments were intended to bad mouth your head buttons Dick. More of a comparison.

A few have already requested copies of the Nelson chamber which I'm happy to do if the numbers increase a bit more and someone wants to loan me a head to copy the chamber from.

Brian

I don't think Al's comments were intended to bad mouth your head buttons Dick. More of a comparison.
Brian
[/quote]

  Thank you, I will send you the Nelson head if you need it.
Thanks Al

Quote from: Motorman on August 21, 2023, 09:57:27 AM
Al, at what speed are you guys going to .018"


MM

AMA rules for fast combat have required .018" x 60' for decades. Anything else is irrelevant

I'll let you know if I need it. At this point there are 12 requested. If we get to 20 I'll proceed with it.

Brian


  Thank you, I will send you the Nelson head if you need it.
Thanks Al
[/quote]

Quote from: Reptoid on August 23, 2023, 03:05:59 PM
AMA rules for fast combat have required .018" x 60' for decades. Anything else is irrelevant

That's good but they fly Vintage combat on .016" last I knew. I suggested they go to .018" for increased safety but apparently I'm stupid.

MM