Daaaang ! You are pushing the limits !
Do they make adjustable props for planes to adjust the amp load and speed? whats is made of, Balsa and plastic? Are parts readily available? What radio do you use?

Pretty Cool !

quote:

Posted April 03, 2005 11:55 AM
Daaaang ! You are pushing the limits !
Do they make adjustable props for planes to adjust the amp load and speed? whats is made of, Balsa and plastic? Are parts readily available? What radio do you use?

Actually the plane holds together pretty well...I usually do some dives from 400ft or so full throttle and pull out at the last minute without any problems. I did use metal bolts vs the break away allens that come with it. It's a fiberglass/balsa combo. I'm not aware of adjustable props...the one I use is fixed. Basically you just put an amp meter on the wires going from the speed controller and change prop pitch until you get where you want as far as draw. Keep in mind that it also effects the top speed and climb capabilites of ths plane which is important on the hand launch. My plane with the current set up is set up for about 160-179mph straight and level and well over 200mph in a dive. When it goes by...you turn your head very very quickly. Most people cannot fly this plane with my set up due to vision problems...and the ability to manage the plane going at these speeds. It's very hard to keep an eye on this plane at those speeds. It will hang with the turbine jets easly....except for the big boy bobcats etc that have serious thrust.

Mike

I want one of these for My Rody engine!!

http://rbinnovations.com/catalog/images/ofna_engine.jpg

Riva Crew, when are you guys coming out with a a supercharger kit like this? LOL
A Riva tuned Nitro car!!

thats what I'm talkin' about !!!

Put that in an 10th scale and simulate a miniature "Bonneville Salts" speed run

Check this out !!

This message has been edited. Last edited by: RX951,

billy, where did u get that pic from and what type of vehicle does it go into. Looks like a dragster motor. Also we need a pic of a turbine jet plane that goes 150 and up. I will try to find one.

It is a "drag boat" motor or dragster motor.

Nice upgrade for a yard blower or chain saw !

check out tis link of a Gas turbine RC car

http://www.corpcomp.com/weeks1/Car/Car.html

do those s/c work for those motors??? looks like it would have major belt slip. I couldn't tune the reg motors... good luck with FI. LOL

I would think so. Especially as along as the belts are "cog" type belts.
I hear ya on the FI !

I am so conservative, I can't seem to get away from 10% Nitro.
Using 20 & 30 % gets me nervous about running it too hot. I always run it a bit "fat" anyway to maintain my head temperature around 240-250 degrees. I knew guys that would run that head temp around 290-310 with barely any to no vapor "exhaust" trail! I can't go there.

RX951 "billy" correct?


Actually your backwards concerning nitro content. The egine will run cooler with 20% because you run it richer then say 5-10% The life span on your engine will shorten about 15 hours or so going from 10 t0 20%. But if you do switch ensure that your richen up the engine. I don't recommend that you run that anymore then 275F after that your really pushing the limits.

Mike

Actually 230-250 should be the max running temp. That is plenty fast and plenty rich w/ smoke out the tail. If you guys have a temp gauge, it will help to determine the optimin temp range. For my 1/8 scales, I always ran 20%, but then when when I would race at sactioned races, I moved up to 30%. I never went back to 20%. Spoiled I guess. At the races in Dallas I used to race at if you didn't have 30%, you were azzed out. When I used to have my 1/10 scales, I would only use 20%. Billy unwind that motor and quite holding it back. These motors really last a long time if taken proper care of. I only use novarossi motors as they are one of the best on the market. They rock.

I always ran 210 220 temp on my Nitro rs4 and my RC10GT they seemd to last around 2-3 gallons.

The more Nitromethane the higher engine output, true. And yes, Longer engine life will be attained with a lesser Nitro content. That was my concern. I have never lost an engine so to be conservative, I wanted long engine life and the power I acheived from this Traxxas enigne with 10% was more than sufficient for me.

Higher % Nitromethane increases the RC engine's performance. As you guys know, Nitro content ranges anywhere from 10% to 30% on average. The typical nitro content is 20%, however racers typically use 30% or more, depending on their personal preferences. Rec drivers use 20% or less.
Higher levels of Nitro may require adjustment of the compression ratio to prevent detonation.

The higher the nitro content, the harder it is on the engine, so using nitro closer to 30% is usually reserved for serious racers who plan to rebuild their engines after they have raced.

The mojo nitro enthusiast typically uses 10% to 20% range for recreational engine use.

So for my application, street driving, I don't think I am holding anything back.

I use "Blue Thunder" which has great oil lubrication.
Red Alert and O'Donnell seem to be the top fuels right now with the newer class of lubricants.

quote:

I don't recommend that you run that anymore then 275F after that your really pushing the limits.

I hear ya Mike. I usually try to keep mine around 240. But I would see knuckle-heads pushing it too far leaning it out. but they did not mind replacing motors. I have never lost an engine.


What brand fuels are you guys using?

Mike, have you ever flew of of these, electric RC jet planes? (Ducted)

Electric RC Jet Planes

No....after watching one fly I changed my mind. They are under powered and actually very very slow. It would be like me taking your 951 and throwing you on a 3 seater bombardio ski....not very amusing. They would be half way ok if your not used to something fast...but they just lacked power....and very heavy.....they need to be about half the weight they are to be a good plane.

Mike

Well guess I'm a diehard 30% user but have never lost an engine. The ones that I have now have had 3-4 gallons run thru them and are still are tight. what due mean jets you have seen are slow. you need to come here to george bush park where they push the limits. we have some very nice ducted fans here besides all the other planes and helicopter pilots. Maybe you just saw a slow plane.

Coop,

If you re-read my post I said there are "SOME" fast jets. Trust me man...your in my grounds when it comes to this. I have invested 20K in two years in planes helis...etc. I have been at "TOP GUN" many times. I live 10 minutes from BVM jets...which is about the best you can get. If you visit their site...Bob does a great job and I fly with their group often. Not sure if you know but the AMA stepped in and limit them to 250mph now. I have seen many run 300+ prior to them stepping in and restricting them. Not pretty when they come apart that fast with hundreds of people standing 25 feet from the flightline and these things come by. Typically DF jets are decent once they get going...but have a horrible take of characteristics..... I have been in the sport for 20 years....and seen a lot.


Regards,
Mike

Re-read done. Thanks. We started viewing this sport back in the early 70's at Sea World in SanDiego. They always had boat races. Lots of fun. I like the planes but don't have the patience once crashing. I used to work part time at one of our local hobbie shops to get my parts. Actually, that is how I got all my parts. One of the best ways to learn about the whole sport and to fix a variety of rc's. I love planes and helicopters, but don't have the time to fix after crashing. I can't remember this one guys name, but he is famous here for helicopter tricks. I know what you are saying about the jets, I have seen two do that. At our park though, the audience is far back from the flying field.