essyou35

My Feedback: (11)

I have a yellow aircraft single. I have a spare K100g. Will it be a brick? I think it would be fun to fly but I dont care to be busting it up trying to land it at "100mph" either.

I probably will go with a striaght pipe as the gear arent scale and no gear doors. so might as well KISS and save the $$ and keep the power I would lose with a bifurcated.

I just want an easy to fly, low stress warbird (relatively speaking to larger more complicated jets)

I havent seen a build thread on this for turbine, any out there?

stevekott

I have a Yellow F-18 Single with a Jetcat P-100 and it is an awesome combination. Great Power and pretty good endurance.

Personally I prefer a little bigger air frame with more substantial landing gear. The stock landing gear is a little on the light side and requires consistently smooth landings.

In the air this combination is a great performer.

essyou35

My Feedback: (11)

Did you use the bi pipe from Tam? Any chance you can post some pics of the install? Also whats your dry and wet weight? Thanks! I think I will press forward with the k100g,. though I maybe a pound or so heavier since it is a bigger turbine than the P100.

stevekott

Yes I have the Tam bifurcated pipe.

Dry weight is 15lbs 10oz with an 80oz fuel capacity. Will try and snap a pic of the motor install tonight.

Randy M.

My Feedback: (38)

I have one as well. I also have a k100 without a home. I figured it was not a good fit but will look into it now. Could do away with flaps and ailerons to same a little weight. Mine had been flown on icdf so I don't have fuel tanks or a pipe. Was thinking a straight pipe would be fine. Could be another project for after the big 18.

essyou35

My Feedback: (11)

Randy I wanted one a long time and I bought the last one. However I always assumed a K60 was the best way to go. But after running some numbers it would be a bit weak.

If you have a good runway I think it will be ok but I don't, so I am concerned.

So I may sell it at cost and move on to a mig 15. Im not really interested in a high cost EDF right now.

Randy M.

My Feedback: (38)

May do it at some point. We have access to pretty good pavement. Have bigger fish to fry for now.

stevekott

Jetcat P-100

essyou35

My Feedback: (11)

Thanks for the pics Steve. Looks like a good install and you have all the goodies in there like the pipe and the mylar tanks. Great looking jet and great build.

heytex

My Feedback: (11)

I am installing p-70 jetcat. Tams tail pipe need CG single yellow f-18 starting point. Thanks will send pics when done

dw_crash

My Feedback: (6)

Guys,

I have a Behetec JB55 in my F18. It is a 12 lb trust engine. The dry airframe is around 13 lbs. I don't know with fuel. It flies fine on that power. Remember, this is an old ducted fan kit. It was designed to fly with maybe 10 lb thrust. It is a fairly light airframe. Putting massive power, reinforcing it, etc.....will just make a lead sled. Keep it light and with modest power. my loonies worth.....

essyou35

My Feedback: (11)

DW thanks for the input. My thoughts:

If you have 80 oz of fuel that is around 4 lbs. So your take off weight is about 17 lbs with only 12 lbs of thrust. YUCK
If you have 60 oz of fuel that is 3 lbs, so 16 lbs take off weight.
So a .70 to .75 Thrust to weight. That's exactly what is causing me to use a K100g.

That thrust to weight on a draggy airframe is not very fun. If it were a bandit or something slick I think it is ok. I have an f-16 with a .70 thrust to weight and it was not fun, and the f-16 is nowhere near as draggy.

I'll be about 18 to 19 lbs take off weight so I'll have 1 to 1 on take off!

I'm still thinking it over. I pulled the airframe out tonight and marvel at how light it is layed up.

If anyone has any vids of it flying turbine that would help me decide.

It just sucks there is not an f-18 that can use a 100N turbine well that I have seen.

dw_crash

My Feedback: (6)

Actually, I have about 50 oz of fuel onboard. Remember, the JB55 sips fuel in comparison.

At .8 thrust to weight, it still far surpasses the real thing. Check out YouTube, I believe I saw vids of F-18 flying on Wren 54s. There are also vids of Wren 54s flying JL Snowbirds and Hawks. These birds are 21 lb dry. Or, at least my JL Snowbird was. It fly well on the smaller engine. The only time I saw the need for more power was on really hot days or if flying off grass.

I agree with you....the trend now is huge airframes with 140 or 160 newton engines on them. The smaller 70 to 100 newton airframes are like hens teeth. Shame.....I find due to transport and other issues that the larger jets just are not practical for me. So my choices are limited. JL has two or three choices....Skymaster also has a couple....that is for scale. Then there are a few sport jets.

Try to keep the weight down. YA retracts and struts are not exactly heavy duty. Remember, they were designed for a light 12 lb ducted fan. The landing speeds and weight are less than with a turbine.

Just seems that the jets went like all the other models......bigger is better.....or go big or nothing!!!


Good luck

essyou35

My Feedback: (11)

There's no way I can keep the weight down with a K100.
The P100rx guy says his was 15.65 lbs with 80 oz so his take off weight is 19.65 lbs.


I have to rethink this, I have an su-37 from hobbyking that is close to the same size. the airframe is built up HEAVY. With a dual power system (EDF) it was going to be 16 lbs which I thought was ridiculous for a jet that size.

I wonder if I can sell the f-18

dw_crash

My Feedback: (6)

Here is a neat video. It is the YA F-18 flying nicely on a Wren 44 turbine.

https://www.youtube.com/watch?v=h-5T-jipHpM

You don't need 1:1 to fly well........

heytex

My Feedback: (11)

Still looking for help on factory setting CG thanks

essyou35

My Feedback: (11)

I am starting this build now, I wonder what the average time is? I will be slow, first time from scratch. But I have a feeling it may be less work than re-engineering some of the ARFS I have done.
The k-100 looks huge in it!

luizoffonseca

My Feedback: (1)

hi
do you have the CG point f 18 single yellow
I am installing p-60

RAPPTOR

My Feedback: (41)

were is the gear

luizoffonseca

My Feedback: (1)

CG local point are the gear

Shaun Evans

Hi,

The one I had the most fun flying was equipped with a P-120!

tisdall_80

I've had two of these.. Both flying on tailerons.. Awesome little jet. The first one had a wren 54 and second a Jet munts VT80/Tamjets pipe.. Simply awesome combo with the 80..

tisdall_80

This is the 18 with the VT80..

RAPPTOR

My Feedback: (41)

Weight?

ron Sweeney

[QUOTE=dw_crash;11965760]Here is a neat video. It is the YA F-18 flying nicely on a Wren 44 turbine.

https://www.youtube.com/watch?v=h-5T-ji

Hi folks, the enclosed video is of my model. I used a single outlet thrust tube to keep the weight down. It had the original two D/F saddle tanks coupled in parallel to a 16 ounce tank located under the rear of the two hatches which gave the Wren 44 about 8 minutes duration. It was designed for grass field operation and flew well with more than enough power. As stated the yellow scale???? gear is not man enough for this application but the biggest draw back was the polyester fus' moulding used with the early kits. It was very brittle and would crack with the minimum of provocation. To save weight I set the model up with purely taileron control and this proved sufficient. Ron.