Kitfox Model II (950) Engine options

[Geowitz]

Skypirate - Didn't mean to come off that you shouldn't suggest it. Was just mentioning the differences

[SkyPirate]

No problem George i didnt take it wrong, just thinking of options

[estepec]

Thank you all for the responses. Currently have a KFM 112 and looking for a replacement. Seems my best choices are a HKS and a 912. I've seen the used market for both and the used prices are the same. If you had a choice between the two, both at the same price and to refit a model II, what would yours? Again, thank you for your responses.

[SkyPirate]

Being its a model 2 id go for the lightest option

[SkyPirate]

The kfm 112 produces 62 hp (46 kW) at 3400 rpm for three minutes for take-off, 60 hp (45 kW) at 3200 rpm for five minutes and 54 hp (40 kW) at 3090 rpm continuous,..it weighs 119 including the starter, alternator and carb,..
fuel burn 4.3 US gal/hr) at full power, 2.97 US gal/hr) at 70% power

912ul 134.2 lbs 79 hp burn rate in a model 2 is going higher then in a 4 because more drag on the 2 i'd guess 5 plus n hr
I don't know much about the hks as far as weight,..fuel burn..etc
Wikipedia says
700EInitial version, normally aspirated and producing 60 hp (45 kW) at 6200 rpm for three minutes for take-off and 56 hp (42 kW) at 5800 rpm continuously.[1][3]700TTurbocharged version with a 62.5 mm (2.5 in) stroke and a compression ratio of 8.8:1, that produces 80 hp (60 kW) at 5300 rpm for three minutes for take-off and 77 hp (57 kW) at 4900 rpm continuously. The engine's dry weight is 57.5 kg (127 lb) equipped with electrical system, electric starter, fuel injectors, gearbox, exhaust system and turbocharger. The initial time between overhauls is recommended as 500 hours, but this is expected to rise with operational experience.[4][5]
The reduction drive is a choice of two integral gearboxes: the A-type gearbox has a 2.58:1 ratio and can accommodate propellers of up to 4,000 kg/cm2 inertial load; the B-type gearbox has a 3.47:1 ratio and can accommodate propellers of up to 6,000 kg/cm2.[1][3]

The 700E burns 9 L (2.4 US gal) per hour in cruise flight at 4,750 rpm. The recommended time between overhauls is 800 hours, although this is expected to be increased as experience is gained.[3]
Producing 60 hp (45 kW) at 6,200 rpm for three minutes for take-off and 56 hp (42 kW) at 5,800 rpm continuously

Dry weight: (121 lb)

knowing this,,between the 912 and the hks,..the hks would be a better swap and have similar weight /fuel burn

Chase

[SkySteve]

I know nothing about all the technical stuff. I do know I have a model I, highly modified, with a 912A, 80hp. Wouldn't trade it for the world. Love it.

[SkyPirate]

what are your specs Steve? fuel burn..cruise etc

[SkySteve]

Cruise at 100 mph burns 4.5 gph.
Cruise at 95 mph burns 4.2 gph.
Cruise at 90 mph burns 3.2 - 3.5 gph.
Cruise at 85 mph burns 2.8 - 3 gph.

Home airport is at 4,200 MSL. Most of my flying is between 5,500 - 8,500 MSL.

[SkyPirate]

impressive I figured the model 2 would burn more because of the underchambered wing..higher speeds higher drag,,unless you have different wings on then model 1 wings ..that's pretty good spec's thanks

[SkySteve]

Mine has model III wings.