Lee Cox

Is anyone flying the Bv BobCat with a Wren 54, just want to know how the two perform.
I don't expect it to be ballistic, but will it fly with some performance.
Much appreciated in advance!
Lee

Jetmodeler

Lee,
I have flown Bobcats with JetCentral Super Bees and RAM 500's and all perform well. You are right it is not ballastic, but they have plenty of power, and at the lighter weight the Bobcat really handles well.
Jim Hiller

Lee Cox

Thanks Jim,
Do I need to pay extra attention to the thrust line, it seems that the instructions are very Jetcat based, so I may need to play with the turbine mounting to fit the Wren
Any advice?
Thanks

jetflyr

Just pay attention to the thrust angle. If a P60 performs well at 6000'...which it does..., then the angle is correct and your performance will be wonderful.
Greg

Xantos

Hi Lee,
I was flying my bobcat with a PST600 which is almost identical to the Wren 54 in size and weight and thrust @ 14.5lbs.
I did around 60 flights with the PST600 and then upgraded to the PST800 (similar to the supersport)which puts out 18lbs and the difference is huge.
A Wren supersport or something similar in the 18lbs range would be the perfect powerplant
14lbs thrust in my opinion is not enough
Xantos

David Gladwin

Well, my BobCat (the original) has knocked up over 200 flights with a PST 600 in temps as high as 40 C inc off a short grass runway and still going strong . Been timed at 199 mph from a shallow dive and will do a vertical 8 from the bottom up . Its light and fuel efficient, a delight to fly, now with Spektrum 2.4 More power = a bit more speed and more vertical, (and higher fuel burn) as on my XL with a JetCat P70. You simply dont need more than a PST 800 or Wren Supersport, both wonderful engines.

Regards,

David Gladwin.

Lee Cox

Thanks Guys for your responses, I have a Wren 54 already, so I'll give this a go and see
Lee

AVIOJET

Hi Lee

BTW the best thrust-weight-size-price ratio. I am thinking to purchase one of this for my P120 powered BobCat

http://www.jets-munt.com/pbEs/wp_b21...10062408008299

BR

Jesus

Tom Antlfinger

My Feedback: (24)

John Redman of Horizon Hobbies has been flying his BARF with a P-60.......very fast.....giving Ali's UltraBandit/Olympus? a run at Florida Jets....

I have found that keeping lower power on jets is fine as long as you have enough power to get off the ground comfortably....for instance, I can fly my 80" BVM F-86 with a P-120 off hard surface, but not enough blow to come off 700 ft of grass comfortably in the hot summer when temps are in the 90's and density altitude get up to 3000 ft.....needs a Titan or Rhino .....once in the air, very little difference between 120 and Titan/Rhino.....

I have a Wren Supersport on my BARF and it is very fast......

Tom

Worzey

My 19.5 lb Bobcat XL (kit built, not composite) is fitted with a MK 3 Wren 54.
It will take off from our grass strip in 40-60 meters and two thirds of that on tarmac.
From level flight, loops can be as big as you like but if you decide to roll it in the vertical, it will slowly run out of steam. I'd estimate straight and level flight at approx 175 mph. With 3 litres of fuel on board, I usually set my timer for 10 minutes then land. This usually results in 3/4 of a litre still left in the main tank.
The slow speed handling is superb but with the landing gear lowered about 2/3 throttle is required to overcome the drag of the airbrakes and maintain good speed. The low AUW also makes for a low touch down speed.

From previous comments made, i'd be surprised if a 54 powered BC would give an Olympus powered Ultra Bandit a run for it's money. Remember that the BC is considerably smaller than the UB which can make it appear faster than it really is. When Ali had his UB at the Classic Jet events earlier in the year, there were very few, if any models that would put it to shame.

Tom Antlfinger

My Feedback: (24)

Worzey:

Perhaps a bit of hyperbole on the straightaway, but when flying a pylon pattern at a busy jet meeting, the BC keeps up quite well.....sort of like who is going win a Formula 1 Reno Air race.......a 747 going 300 knots or Formula 1 racer doing 200 knots......I put my money on the teeny bugger.....

Tom