There are a few of us that are interested in an entry level jet for grass operation. I am inclined to try one of Bob Parkinson's with the Byron/IronBay pusher and an OS .61FX, as he recommends.
Has anyone purchased a kit from Parkinson lately? What is the wait time? Has anyone tried the OS .61? I don't need the all out speed, I just need it to take off. Sounds like low cost fun doesn't it?

I emailed Bob Parkinson for a demo tape on his grass jets and it arrived in a week. Is there any reason a kit wouldn't?

Thanks,
chris

BOOMERANG.
No more questions.......

Gonna be underpowered with a .61FX.....probably O.K. coming off hard surface, but not grass.....

We've got lots of flights on grass cut to 5/8" with a BP F-15...SpringAir Retracts with wire struts all around......always ran Dynamax Fan with OS Max .91 D/F and JMP pressure pipe.......still required at least 300-350 ft to come off grass...even more on hot summer day.......very nice flyer in the air....about 90-100 MPH.....

Don't know much about BP's delivery schedule nowadays......

Always was a nice kit, when you could get one....

Tom

The 61FX is not a ducted fan engine; it is not a rear exhaust engine and won't turn the rpm's; it won't work at all. To have success you will have to have the OS 91 VRDF.

I thought the same thing about the OS.61, but Bob says it works. I wonder if the fan blades are set differently.

Have you thought about a Trim Aircraft Spectre? This one takes off in less than 250ft on an average grass strip. is relatively cheap with os91vrdf and ramtec fan will do around 200mph. Lands like a kitten aswell.

Matty

It looks cool too mate. Where do you get them in the States?

spectre modified for turbine.....

This is a cool jet :-)

Hi,

These gentlemen are correct about the .61FX. That engine will not turn sufficient RPMs to move a jet on a Byrojet fan. If you ask anyone on here whether or not they've seen it actually happen, I think you'll see what I mean. If you're gonna do a jet, go ahead and get yourself an O.S. .91 fan engine. If you take care of it, it will last you as long as you're in DF.

Thanks Shaun,
Where can the OS.91s be purchased new?
Chris

I think TGA still has some in stock, I also know the local hobby shop here in the Fort has one in stock. Has the big head for Byron fan.[8D]

Hi,

Check with Tower Hobbies. If not, Yellow Aircraft has inventory of them. There may still be a few lurking around here for sale as well. Best of luck!

theres usually alot on Ebay at any given week.