New engine

Use this forum to discuss technical points relating to the Nipper and its ancilliaries.
Posts: 56

Re: New engine

Postby svenolivier » Mon Sep 27, 2021 6:48 pm

Hi Paul, I am thinking about the initial oil demand and have noticed the bulb below the sump in the pictures you posted. If i fill the oil tappet line before hand will that assist in the initial oil demand? I am using 1/2 hoses and there is quite a volume between the T-piece and the oil valve?
The carb is on top and i don't think i can fit it below. I am more concerned about the sideway space demand of the Revflow - it runs into the oil line from the fuel induction and the spark coil on the opposite side. But I am thinking things through, and will find a way. I have already modified the cowling for the fuel induction, so i can do that again.
Thanks again for all the advice and input - as a no-mechanical minded person i really appreciate it.


Posts: 70
Location: Norfolk

Re: New engine

Postby Paul1954 » Mon Sep 27, 2021 9:19 pm

Hi Sven,

I have no idea if pre filling would help or hinder things. Would the oil simply not get pushed around the engine? I think you need to be very sure that once inverted the engine will get an immediate and continuous supply of oil. If not, it will be damaged.

I do know that my own Nipper with an Acro engine once flew the length of Loch Ness (22 miles) inverted. Not me I should add!

Good luck.

Posts: 56

Re: New engine

Postby svenolivier » Wed Nov 03, 2021 11:39 am

Hi Paul, Neil
I have now done around 4 hours with the new oil set-up and everything appears to be normal - oil pressure good and no leaks. All still only positive G aerobatics.
I have fitted the new harness and an extra lapbelt. After the last flight I have also managed to fit the RevCarb, but as Paul anticipated I had to cut the cowling - extra glass work to be done. The fuel tank is now in the workshop for surgery (flop tube, vents and fuel level indication) - will be another week before I can fit that back into the Tipsy. I posted a short video i took at sunset on Saturday
Many thanks for all the assistance.

Posts: 56

Re: New engine

Postby svenolivier » Fri Nov 12, 2021 5:44 am

Fuel tank mods done :)
Cowling mods nearly finished
will now see if i can get the engine running with the new carb
Hope to see it in the air this weekend :)

Neil Spooner
Posts: 593
Location: Ardleigh, Colchester, Essex, UK

Re: New engine

Postby Neil Spooner » Tue Nov 16, 2021 10:33 pm

Hi Sven,
I am sorry that I have not replied sooner, I am not getting notifications of messages for some reason.
Please send me pictures of the breather system you have now.
Send direct to
A little help goes a long way.
Nipper G-BRPM and G-BALS

Posts: 56

Re: New engine

Postby svenolivier » Sun Feb 06, 2022 7:11 pm

IMG_9059.JPG (1.47 MiB) Viewed 794 times
IMG_9062.JPG (1.4 MiB) Viewed 794 times
IMG_9065.JPG (1.31 MiB) Viewed 794 times
Good to go - I hope - fingers crossed


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