Turbocharged Cheetah --

[Turbo]

hey all -

Wondering if anyone has seen a turbocharged 914 in a Cheetah before ??
I have just purchased a 914 turbocharged engine (wow with my turbo on it) and wondering if anyone has installed one of these in a Cheetah before? Results?

Maybe ill be the first...

[Goose]

The weight will be the killer of performance

[Boet]

As complexity is the enemy of reliability. Why do you not go ahead and chuck in a god damned 200horsepower engine? Dammit. If it fits under the cowling, it is too small.

[Loco]

Wow nice engine Turbo geluk! Ek sal like om so ding agter op my trike vas te strap!

[Turbo]

Boet -- trust me if i had an engine that made 200HP -- it would be in the little plane -- bet the firewall wont hold the abuse, but i have practised engine outs with Paul --- hehehe

Op n trike -- jy gee my nou idea's hoor!!

[bobthebuilder]

Dude! ..... in a Cheetah? Really?

[Triker]

Dagse ouens. Snaaks, ek het so twee weke terug met Walter van Rainbow gesels en gevra of Rainbow al ooit `n 914 in cheetah gesit het.Hy het gese nog nooit nie.(Rainbow)
Sy response was dat dit `n groot mors van geld is. Die 914 bied sowat 15 sekondes van turbo en al waar mens dit gaan gebruik is sekerlik net met opstyg. Verder is dit `n standaard 912 100hp. En die 100 Hp bied meer as genoeg krag vir die cheetah se gewig, opstyg /land/ straight and level etc... So daai odd R60 000 verskil tussen 912 en 914 is nie moeite werd om te spend nie.

Maar as jy die bokke het, of die engine het, gooi pappa

[Turbo]

botthebuilder -- ya why not!? it hasnt been done before. Besides, if the firewall doesnt hold up, im sure i remember how to perform an engine out -- Thanks Paul hehe

Triker, -- wierd how such a comment would come from Rainbow -- as the difference in price between the 100HP and the turbo engine is not R60K ... anyways i did buy this second hand and for a reasonable price. I currently have the 95HP 912EXTRA engine in my Cheetah, and will be installing the turbo engine (every engine i own has a turbo or two on it .. why stop)

the turbo can be used for up to 5 minutes with full throttle, not 15 seconds, and is perfect for climbing, take offs, and believe it or not fuel consumption (Dependant on flight conditions and boost during cruize etc) I would obviously set my engine up to my liking, and most definately would re-calibrate the electronic wastegate control based on throttle position so that cruize is utilized at just under boost (vacuum) for best fuel efficiency, and throttle application 40%+ to start coming onto boost limited to 50% of available boost for additional power required for slight altitude corrections (climbing) for different runways, conditions etc.

I like to think of it like this -- Chip Foose built a Chevvy Nova (cherry) with an engine far too large for it -- moral of the story, you can drive a fast car slow, but you cant drive a slow car fast ...

[Sideslip]

Hi Turbo.

Congrats on the SOLO!!!! Paul is very happy with your progress.

We are all there for people making mods to their Cheetah if done in a safe & legal way as I am sure you would do with this project.

The fitment will take a little planning and engineering. I suspect the cowling will need some re-working.

I do have 1 concern though - not that it would probably come into play but its something you need to consider as it would appear you have a slightly incorrect perception of what would happen if the motor was to separate from the frame. The aircraft does not become a controllable glider under these conditions. You will not have enough elevator authority to overcome the massive centre of gravity (c of g) shift.

Have a word with Paul about this and get him to explain about C of G limits and the repercussions of exceeding them.

[Air Hog]

This is easier said than done. The weight difference is enormous. Your CoG is going to be a major problem. Please make sure before you attempt this conversion.

[Sideslip]

P.S. Price on a new 914 is aprox R95 000 more (+vat) than a 912uls.

[Triker]

Hi turbo

Ok so it was not R60k... it was more
From what i have heard (and more than 1 person) the turbo on the 914 can only be engaged for 15 secs(safely). I am not going to argue as Im no expert. Maybe some tech guys or guys very long in the industry can confirm above as I would like to have my facts straight (just for own interest sake) before i go and further baffle other people with incorrect figures. In my personal opinion, you cant compare cars to aeroplanes. Maybe chip foose realized that too.

[Turbo]

Thanks alot Sideslip been working at it now for just over 2 weeks, so 10 hours a week works out well i guess. I should have the license wrapped up in the next week or so - dependng on how my grey matter handles the frikking air law subject...

Im well aware of the CG shift, i was just kidding, if the motor falls out, i jump out!

Regards the price difference -- sorry to say but you are incorrect, i have the quotes in USD on paper INCL freight (ok fair enough i am involved in shipping every day) -- it is not even R40 000.00 difference. Someone is making huge money off us local people somewhere (not saying it is you Mike, but someone surely is!) mmmhhh

[Triker]

Someome is making money. Its called import tax (A-nother N-ation C-oncerned)

[Turbo]

Someome is making money. Its called import tax (A-nother N-ation C-oncerned)

lokasie donasie --- ek hoor jou.