Vario-RCU

Luis sent u mail at the flyin address above let me know if you got it or not ,a pm is fine. If not I'll resend.

Thx,
BW

BalsaBob

My Feedback: (24)

John, I may still have the issue of RCM or MAN that did the review on it. I will look for it. I could scan and post a pic if I find it. Bob

JWN

My Feedback: (42)

Bob,
That would be great. I remember it being a good looking little model, but that's all I remember of it.

Thanks,
John

rcbart

I recently bought the JoeCat plans, look interesting. I haven't yet been able to find a copy of the AMA article, so would like to be 'copied in' if you send of something,

Send to "[email protected]".

Thanks
Bart

Yalibat

Hi Mark, do you have any video of your larger mig 15, I´m very interested to buy it in RT model, with the .18 toky df.

johnny

fanman-RCU

My Feedback: (1)

Just dropped in to see toki 18 interest.
I just flew my hb-a7-corsair on 09-23-2003 here in Tn.
I got two flights on it and it is great.
No problems.
Please let me know of any kits avalible for toki 18
I been away from computer and flying for a few months,
trying to catch up on latest.
fanman in tenn.
[email protected]
thanks

Gordito Volador

My Feedback: (1)

Being a ducted fan guy, I am very interested. I am flying EDF and Byron ICDF right now. My vote for a plane is F15 & F16.

Mark,

Are you going to the jet rally at Lake Wales? I am bringing my Byron F16, and also maybe my Byron Mig-15.

Regards, Bill

corey-RCU

My Feedback: (2)

Here is my F-18 project for the Toki, It was on hold for a while but I am working on it again, would like to have the kits ready to go for spring time.

Crazy4Flight

My Feedback: (540)

I liked the DJ-3 when i saw and read about it. But 150-175 just for the laser cut kit was a bit too much. I probally could kit bash a $35.00 SIG Wonder for the Toki.18

fanman-RCU

My Feedback: (1)

Corey
Just wanted to let you know
your f-18 looks good.
I[8D]m flying a hb a-7
and interested in bulding me another
kit for toki 18 package
fanman in tn.

T45WingNut

My Feedback: (1)

where can i find a hb a-7 i looked at tower and a few other places can seam to find any of them all so was looking threw one of my older mag and saw some thing about a f-4 and f-16 for the Toki 18 and one seen or heard any more about them?

Dave03B

Yep, count me in for an F15. Would it fly from grass?????

watt_the!

The opinion is that the Toki will not fly an aircraft from grass. (depending on weight of course)

thrust is 2.2lb...max...

the kress rk720 with a hyper will give 4-7 lb thrust... so if grass flying is needed, go for that power option.,


we are waiting for toki to finish the 0.21...and may include a new fan/impeller.

BTW Toki also make a mini turbine....

JWN

My Feedback: (42)

Got any links?

John

watt_the!

wait for something VERY special from Oakdale...

Toki are new on the scene and in the midst of translating their website...and mid 0.21 testing.

i have a 0.18 here and we have it on a sliding scale for thrust testing...

we have specced a 0.21 for them along similar lines to the kress performance...so we'll see.

basically if you can get a kress to 30k revs, you'll get 4lb thrust. 40k revs you'll get 7 lb. the catch is that the kress needs over 3.0 hp to get to 40k revs...

we're working on the toki at 40k..which we know can give over 5 lb thrust...currently the 0.18 does 28k revs..which is around 2.2 lb thrust at 0.8 hp. We dont know if the impeller can handle 40k without breaking at this stage.

As I said... keep an eye on Oakdale aircraft...

Tim.


[8D]

JWN

My Feedback: (42)

I just bookmarked the site. I'll definately be keeping an eye on the site. I have yet to fly my DJ-1 with the .18. But from what I've read, I would really like a more powerful engine for subsequent projects.

John

littlepiston

My Feedback: (12)

my a7 with the toki engine and the macs pipe turms 26,000 on the ground if flys it just fine will loop no problem im at 3600 altitude and i also reduced the ex opning by about a 1/4 " removed the T in the back and the smaller pipe takes up less space in the thrust tube also the only thing left to do is mold a cone for the back of the engine

the pipe is hung from the thrust tube by an Oring this is the pipe i used
http://www2.towerhobbies.com/cgi-bin...?&I=LXZ557&P=7

i also have this pipe but it was 1500 rpms lower??? maby it like the smaller pipe??
http://www2.towerhobbies.com/cgi-bin...?&I=LXZ558&P=7

watt_the!

WHY BUILD A CONE ON THE BACK OF THE ENGINE?

You dont want to restrict the airflow at all...you will find that a cone will do nothing for thrust..if anything, it introduces more surface area to slow the stream, adds weight and...it may also reduce cooling. We speculate that as the toki does not have a contoured stator, then the air is left swriling rather than stator work effecting the air direction as in the kress fans. some level of turbulence is fine... you wont get this laminar with the current design.

how long is your ductwork?..what diameter is it? does it converge?/ diverge?...ducted fans thrive on mass airflow..not pressure.. this is a common misconception with df types... any back pressure and you get flow back through the fan or at least restriction agains tthe incoming airflow which increased fan load and turbulence... if your ductwork converges, it has to converge at the same rate as losses are incurred....it's probably better to leave it all one diameter or even diverge..

the best thing you can do for the toki is to make sure that there is no gap between the shroud and the engine/ductwork (at least minimise it.) particularly crucial is the air flow at the shroud..i.e. at the blade tips.. also, get the ductwork as short as possible...we're about to run some tests to determine the best length pipe... as the long pipe means long ductwork... we're not sure if the long pipe losses equate to the gains we get from the pipe itself.

littlepiston

My Feedback: (12)

the duct work i use ,,is the same one i just slit it and overlaped it 1/2" and glued it

i found out that the ex on the rear duct was bigger than the fan ??? Y i dont know but it should be a little smaler >?>? how much i dont know im not that smart but i know my Y/A f-16 has a smaller ex diameter

watt_the!

well, its safer to have it the same size or larger..definitely not smaller...unless you know the4 surface roughness and teh air flow's reynolds numbers so you can design a converging duct that really is only a material-.. i.e. weight saving exercise as the gains would be very small.

manufacturing wise it's easier to keep it the same.

tim.

just be sure you dont restrict the flow... if you got plenty of power then it's irrelevant..you can have losses if you want... but if you want to squeeze evrything out of it..then.....

littlepiston

My Feedback: (12)

well tell you what the improvment is 35to 40%% better now i tell you befor the damn thing would take for ever to get on step
the fist run after i did the mod to it i took it out the my front yard to run it and i figured the grass will keep roling to fast ,, but insted i was taxing it fast enough that i could pull the nose up with the elevator

watt_the!

my guess would be that pwoer/thrust isnt much of an issue then...so the model must be quite light..

ductwork is imperative for sure.. i dont know what thrust difference we've got right now... will find out shortly, between no ductwork versus a properly designed duct.. but "by feel" (i.e. hand over duct), it seems substantial. the air certainly doesnt get lost... so at least its channeled , so although it may actually be less thrust total (summed in all directions), it is certainly more thrust axially.

littlepiston

My Feedback: (12)

thrust if for taking off
the fan puts out 3lb of thrust right well the wind speed i dont know ummmm its like 60 mph
right well ok the duct at ifts full size will give you the 60mph and will have good power but if you reduce it the wind speed incresece and thus reducing the takeoff power but once it the air the it gets going
Dynamic thrust i think its called that

littlepiston

My Feedback: (12)

O the dj one i also have it flys just fine
with the toki enigne its flys just fine on the os 15cvdf and the kyosho fan u it alot fast thena the a7 but the landings are a little bit had the get ust to it will bounce like a basket ball

unles there is no wind then i lands good NO WIND!!

watt_the!

mmmm..3lb... Toki state that their fan and engine develops 1 kg static thrust only....

dynamic thrust is the thrust generated during flight and is expressed as change in [nozzle velocity-inlet velocity] =is proportional to change in revs which is proportional to change in mass air flow, which is proportional to thechange in square of thrust which is porpotional to the change in cube of power.

again, the fans designed should be the best compromise between static and dynamic conditions...

it appears that the best conditions for thrust for the toki would be that to allow max power...i.e. 28 k revs.. which may occur at takeoff speed, or just above.