Search found 45 matches

by Paul1954
Mon Aug 16, 2021 2:13 pm
Forum: ASK AIRWELD
Topic: Nipper G-AVXD
Replies: 6
Views: 638

Re: Nipper G-AVXD

Sven, Acro built a number of VW aero engines, not many have the factory installed inverted fuel and oil system. I think one was G-AWDA, another was G-AWDD. ‘DD’s engine was sold on to another Nipper that was at one time based at RAF Henlow, I cannot remember the registration. You may have some succe...
by Paul1954
Mon Aug 16, 2021 2:13 pm
Forum: ASK AIRWELD
Topic: Nipper G-AVXD
Replies: 6
Views: 638

Re: Nipper G-AVXD

Duplicate post.
by Paul1954
Thu Aug 12, 2021 8:53 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Hi Sven, Can I suggest that you try and make contact with the owner of a Nipper fitted with an Acro engine. They should have a copy of the Acro engine info sheet.It contains schematics of both the fuel and oil system. It is NOT recommended you try contacting Barry Smith who owned Acro. His health is...
by Paul1954
Thu Jul 29, 2021 10:46 am
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Sven, Let me add a few thoughts to the last post I made. The object of modifying the oil system is to supply oil under pressure to the engine in any attitude. A 3-way valve is fitted to facilitate this. When in unusual attitudes the oil migrates to parts of the engine and has to be returned to the s...
by Paul1954
Wed Jul 28, 2021 3:37 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Sven,

I am reluctant to answer that question as it may depend upon the overall arrangement.
by Paul1954
Wed Jul 28, 2021 2:37 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Thanks Sven. Is the carb up-top or below stairs?
by Paul1954
Wed Jul 28, 2021 12:10 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Hi Sven,

For my interest, can you give details of your engine fit?
What carb?
Which ignition fit?
Electric starter?
Backplate fitted or not?

On the last point, if fitted, did you have to modify the standard mounting?

Thanks.
by Paul1954
Mon Jul 19, 2021 4:23 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Probably take about 1990. Oh what happy days they were.
by Paul1954
Sun Jul 18, 2021 1:12 pm
Forum: PHOTOGRAPHS
Topic: ‘JE
Replies: 3
Views: 269

Re: ‘JE

Did you successfully replace the rubber canopy seal?

I do sometimes miss climbing into an aeroplane and flying…
by Paul1954
Fri Jul 16, 2021 2:47 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Sven. You are welcome. Have a look through the tech gen, particularly the early Pitts articles. You will find a lot of similarities to the system used for the Acro. Aircraft Spruce used to carry useful generic parts that could be of use or adapted. As for the flop tube, it was a piece of fairly rigi...
by Paul1954
Fri Jul 16, 2021 12:03 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

More images…
by Paul1954
Fri Jul 16, 2021 12:01 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: New engine
Replies: 40
Views: 9526

Re: New engine

Sven, greeting. Well done with getting your Nipper back flying. Four area to concern yourself with if you want to think about when turning your existing VW into one with an inverted fuel and oil system: • Fuel system - engine • Oil system - engine • Fuel supply - airframe • Weight. You may not think...
by Paul1954
Sun Jun 27, 2021 1:18 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper firewall
Replies: 4
Views: 434

Re: Nipper firewall

Jim Bending metal is not too difficult when it’s a straight bend, but bends on a radius you really need have access to a press and facilities to heat the material. However, for a cold bend, you should use the correct bend allowance for the material - preferably more than the minimum. To lose the exc...
by Paul1954
Wed Jun 16, 2021 9:06 am
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper firewall
Replies: 4
Views: 434

Re: Nipper firewall

Hi Jim, I don’t have a drawing but in the past I have one. Ex RAF tin-basher so it was no biggie for me. Use gripper pins or bolts to secure the old firewall to your new material by drilling the 2BA size holes through the bracket points. Then mark around the firewall perimeter using a pencil (use of...
by Paul1954
Thu May 06, 2021 4:02 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Zentih carburettor - service or replace?
Replies: 6
Views: 1359

Re: Zentih carburettor - service or replace?

Jim, I would say the CD150 is well proven on the Nipper. Owners with 1835 VW tend to go for larger diameter induction pipes. I would imagine that may not be possible with the 1600cc unit? But what size jets to use?

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