Baby flite streak - td049

I am returning to CL flying after about a 25 year lay off, flew plenty of RC in that time but I have been bitten by those good old memeories.

I am going to build two flite streaks, both from the Brodak kits, the full size flight streak will have an OS 25 LA, the baby is going to use a td 049.

Does anyone have experience of the td 049 in this airframe, if so can any reccomendations be made about about prop size and type, fuel mix,line length/thickness etc.

What weight should we be aiming at for the finished model, I guess some of this info may be on the plan, but the kits have not arrived yet and I am itching to get everything together.

Many Thanks Barrie

I use a TD/Medallion hybrid with some sort of Perfect 2/3 oz tank on my Baby Flite Streak (Built 1966). About 35' to 40' .008 stranded. Maybr 45' if you can get a TD to hold needle setting.

John

Do you think the td will be a tricky little thing to needle?

I thought I saw mention that that the td might have too much venturi area.

I went for a td because there seem to be more avalible, I got mine on ebay yesterday.

What prop did you find worked on the hybrid.

You will like the streaks. I have the baby flite streak with a Norvel .061 and my dad has the regular size FS with a Brodak 40. I had the ARF FS with a Norvel 15 but that lasted only 1 flight because the outboard wing was WAY down and outside loop didn't work, but I have another one ready to go now! I had a TD but I like Norvels the best for 1/2A. You just have to loosen them up when they are new. They start easy and run good. I use 6x3 props on .049 motors or 5x4. I have a few old grish props I use and a couple of those black plastic props. I dont know what they are called. I use .008 42' lines on 1/2A's and it works well. My baby clown/norvel .049 flies well with that long lines and does the entire pattern but not as quick as the flite streak.

ryan

Ryan
Thanks for that info.

Do you think the OS 25 La is the right engine for the flite streak?

Are the norvels better than the teedees?

Norvels are better than T Ds. And WAY better than the new T D engines with the straight bored cylinders and pistons.

I have flown my Flite Streak with an OS 25 fp, it went 86 mph on an 8x6 prop and 15% nitro. Zing! I had to go to a 10x4 to tame it.

One of the guys in our club flys one on the LA 25, and he has to run it rich.

Great combo.

Larry

Yes I am more confident with the OS 25 powered flight streak than the baby.

I bought the td on ebay a couple of days ago, so I dont know what age it is, it comes with the kustom kraftmanship needle assembly. When did the taper change in the td's.

Here is a clip of my Baby FS with a Norvel BigMig Startup .049.

http://www.aeromaniacs.com/BabyStreakSquare.wmv

It a great combination. It will fit a Brodak BH521 1oz tank.

Heman
www.aeromaniacs.com

Neat clip. I have borrowed a videocam from my elder son, and will have to try some of that! What is involved in getting the clip from the camera to the web?

LAST EDITED ON Mar-09-04 AT 00:12 AM (CDT)
 
The best way to get video to a PC is to get a DV cam. Most new CAMs are in DV format. That will give you the best resolution 720 X 480.
Make sure the CAM has a 1394 interface (known as Firewire) or USB interface. The 1394 interface will give you best interface to the PC because it can fully controls the CAM's editing and playback function from the PC console.

And, if you already have Windows XP, there is no additional software. XP will do everthing using Movie Maker 2.

If you have an old analog CAM, you can look into the Dazzle or Pinncale products that can accept RCA video input and convert them to digital or AVI format. Some of the older video on my web page use this product, but the resolution is low. You can even convert old video tapes to digital format.

http://www.pinnaclesys.com

That combo looks to run great together thanks for posting the clip.

LAST EDITED ON Mar-08-04 AT 10:22 PM (CDT)
 
> .........I had the ARF FS with a Norvel 15 but that lasted
>only 1 flight because the outboard wing was WAY down and
>outside loop didn't work, but I have another one ready to go
>now! .....>ryan

Ryan,
I am currently building a profile for the Norvel 15.
Out of curiosity, what does your ARF FS weigh with the Norvel 15?
Roger

you will have problems with the tee dee on suction. I agree that the Norvel is much better than the present Tee Dee. I like the old ones after you loosen up the case to crank fit, but then I still have a few piston / cylinders that Dale Kern sold me that were hand fit by him so that part of the equation is very good for me. I liked the c*x 5-3 for the tee dee flying CL combat.

Do you think the TD has too much venturi for suction running?

If so I may make up some kind of sleeve to reduce the area slightly, is that where the problem lies?

Thanks for any thoughts you may have on this subject.

Bazzer,
Try your TD before making modifications. The KK needle assembly will give you finer control over the setting. It is almost mandatory if you use a pressure system.
Although the TD is an old design, there have been many satisfied users. It was king for a long time. Also remember that some of the suggestions are for maximum performance...which you do not need on that plane.
If you need to restrict the intake, there was a good article in FM a couple of months ago on how to set up a TD for throttle. It included decreasing intake size.
Make sure your fuel has 15%-25% nitro and 20%-22% lube with much of it castor.
Both Norvel and Cox use the same glow plug threads. You can mix and match. I tend to use TD plugs in TDs. If you keep the nitro and RPM reasonable, they last.
These are only opinions...individual results may vary.
Good luck with both Streaks.

George

Thanks for that info, I have not seen many Norvels in England, it is easier getting a TD from the USA via Ebay, I agree about the TD being an engine with many satisfied users.

Do you think it will be OK with all of the 22% lube being castor?

I am really looking forward to getting this little thing up in the sky.

They run great with all castor lube but will eventually get a layer of varnish in the cylinder. At that point you remove the plug and cylinder and clean off the varnish with a wet Brillo pad or fine steel wool (with soap and water).
Using some synthetic in the fuel appears to lessen or prevent varnish buildup.

I put a Norvel AME 15BB on my ARF Flite Streak when I first flew it.
The total weight with engine was about 21 oz (Very Light) It flew real nice on 56 X 012 lines. I had to add 3/4 ox of nose weight to balance the FS.

The only problem I had with the Norvel, was a consistent stunt type run. It wanted to run like a combat ship. If you like that then this is the setup for you. I still thing the venturi need to be coke down a bit.

>
>The total weight with engine was about 21 oz (Very Light)
>It flew real nice on 56 X 012 lines. I had to add 3/4 ox
>of nose weight to balance the FS.
>
>Thanks, needed a reference before I decided on type of finish and covering. 22 oz s/b attainable.
Roger

I've always run TD's on pressure, either bladder or crankcase pressure. I like a Master Airscrew 6 x 3 cut down to 5 1/2 or the APC 5.7 x 3. I have a Top Flite kit of the Baby Flite Streak and a copy of George's plans, so I'll have one, probably with a TD, one of these days.

Jim

I think I may try the crankcase pressure route, can you get a rich run on the TD on crank pressure or does it have to be 'balls out'.

If you use the pressure port on the side of the crankcase, you don't need the fine thread needle, and you should have a more controllable engine. The little nipple is small and slippery, so what I do is take a 2x56 blind nut and turn the flange down to be an angled nipple like you find on a pressure tap, fuel filler etc. Screw and CA that onto the nipple on the side case, and your fuel hose will stay on nicely.

As I recall, the trick is to turn the crank "window" to face the nipple and then drill through the plastic and aluminum with at most .040" dia. drill. I would go with .025 if you have it. Any tiny bit of scrap that falls inside the engine can be flushed out by removing the backplate and squirting some fuel or alcohol in.

Larry

That is what I would call timed crank pressure, we used to use a nipple directly into the crankcase on our pylon race engines, it was a bit harsh.

Did you work for Cox at some time?

I've run crankcase pressure on TD's off the backplate. I've always run them pretty hard. One problem with the crankshaft nipple is that it gets in the way of motor mounts.

Thanks for your input,I think I will give the TD some bech runs to see how it handles on the different pressures.

That would be interesting knowledge even if I still flew on suction.

Regards Baaie