Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

F20 - how fast?

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Old 02-09-2005, 01:22 PM
  #1  
HaveBlue
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Default F20 - how fast?

Hi to all the speed demons out here, just want some opinons , what speed range do you think a .40 -.50 size F20 would be capable of with the right balance, weight , engine and prop combination????
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Old 02-09-2005, 05:45 PM
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Cyclic Hardover
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Default RE: F20 - how fast?

Well I am at 5000ft and get about 115mph on my DC F20 with a Jett 50 and 9/7 apc. Considering the height here, this is very good. Those around sea level are in the 130ish mph area.
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Old 02-09-2005, 06:07 PM
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Flyjets
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Default RE: F20 - how fast?

Blue

I am at Sea Level and have the 60 size F20 with gear doors and a tune pipe. My F20 is fairly clean and with a OS 91 swinging a 10 * 10 I run straight and level at 130mph. In a dive I have seen in excess of 160mph.
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Old 02-09-2005, 08:06 PM
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vicman
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Default RE: F20 - how fast?

My Kangke was around 100/110.[8D] But an ablsolute blast to fly. After a tank I had to put my clothes back on and have a smoke[sm=bananahead.gif][sm=stupid.gif]
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Old 02-09-2005, 08:45 PM
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Default RE: F20 - how fast?

Vicman, and you complained about my kilt comment? [X(] WAY too much information!
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Old 02-09-2005, 08:49 PM
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vicman
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Default RE: F20 - how fast?

Soooo, you DID win first prize.[X(][sm=surprised.gif][sm=bananahead.gif][sm=spinnyeyes.gif]
The real joke is if you knew me you would know I don't smoke. Thats how much fun the
F-20 is.[sm=thumbup.gif]
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Old 02-09-2005, 08:51 PM
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Default RE: F20 - how fast?

Oh, forgot to mention, engine is in and throttle linkage installed. Next session will be tail feather controls. After than just have to do the wing bolts, run fuel lines, cowl, prop, spinner, muffler, install receiver and battery to get balance right, and it'll be ready.
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Old 02-09-2005, 09:00 PM
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vicman
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Default RE: F20 - how fast?

engine is in and throttle linkage installed. Next session will be tail feather controls. After than just have to do
... The rest of it. I'm fighting the cowl on this one, I decided to skip the injun install and let the brain think about it while I work on the rest of it. I mounted servos last night, fuel lines are next.
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Old 02-10-2005, 03:36 AM
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Default RE: F20 - how fast?

hey guys , thanks for all the replies , thats encouraging, I like what I read here..

snoop.. the altitude must be frustrating at times, it be interesting to know what your planes could do with the right prop a bit closer down....but even so nothing to complain about...

hey flyjets, that sounds awesome, I have only seen two on offer here , one is by modeltech a 40 to 60 size and one by pheonix which is a .40 - .50,, I am almost tempted to try my jett90l(when it arrives) in this bird but iI dont think it will hold up without major re-enforcement, BTW which kit is your .60 size anyway...

vicman, Ive been following the thread about the f20.. I had the exact same problem with my phantom when I intended to fit my OS 1.08 the spiiner back plate needs to be 1.5 to 2.5 mm from the nose.. and with the 1.08..this just wasnt gonna happen..so I can relate to your delimma..I solved my problem buy getting another engine for it an ST G90..bad move on my part..oh well ..live and learn

thanks for the replies...might have to think about getting a jett 50 aswell..later on down the track!!!
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Old 02-11-2005, 10:06 PM
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Flyboy Dave
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Default RE: F20 - how fast?

My Rossi .45 powered Cermark chuggs along at about a buck and a quarter.

Dave.
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Old 02-11-2005, 10:39 PM
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HaveBlue
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Default RE: F20 - how fast?

Hi FBD, thats the second Cemark plane I have seen that looks absolutley hot, On the jett engineering website is a picture of a cemark F16.. I dont know if its just the glossy finish or just a fantastic model manufacturer..but I am really impressed with some of the cemark planes I have seen, your one and the F16, although I believe the F16 is no longer available..bummer.. whats the engine spec range on that one FBD?
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Old 02-11-2005, 10:46 PM
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HaveBlue
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Default RE: F20 - how fast?

just alittle off the track here but "piped" engines seem to get bagged over there looks... personally IMHO a pipe looks really cool or two even, ala that twin jett 50 that Erik.R is going to fly ( very soon I'm hoping!!!!)
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Old 02-11-2005, 11:31 PM
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Default RE: F20 - how fast?

Keep in mind Flyboy Dave has both the 40 and 60 sized F-20's the 40 sized I believe is a DC (Direct Connection), and the 60 sized is a Cermark like mine--- I have seen his 40 sized "20" fly and it was IMPRESSIVE!

I am lucky enough to have had the opportunity to fly a couple of Dave's birds (Kaos, & Dago-Red) and he is a master builder and engine tuner---

Few people can make a Rossi howl like super-Dave

Disclaimer: No matter what Dave gets out of his Rossi-45 (18.1K with that black toothpick MA prop.) my Jett-50, 9x9 APC, Retract equipped Patriot was faster than his F-20 --
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Old 02-11-2005, 11:35 PM
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Flyboy Dave
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Default RE: F20 - how fast?

HaveBlue...

....Cermark used to sell the .40 and .60 sized F-2o's. Both of them had "issues",
but they were good planes. I have the .60 size as well. I had the .60 sized F-16
too....but it had too much drag to go anywhere....I had an OS 1.08 FSR in it. [X(]

I actually gave it away.

Dave.
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Old 02-12-2005, 12:21 AM
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Default RE: F20 - how fast?

Razor- its interesting you should mention the dago red, Ive seen an ad for a world models Dago red . looks like a pretty fast bird, where would you rank it amongst the various design's of speed planes ?..p.s yeah I noticed that tooth pick prop...lol mind those fingers!!!!

FBD, I too have got a "spare 1.08 fsr" as it was suppose to go into a warbird of mine , but I copped to much flak over running a two stroke in a warbird , and hence have been looking for a .90 size plane for it, unfortunately I chose the F4 Phantom, only to find the 1.08 was to long for the spinner to sit correctly, since I havent run this engine yet , do you think it has some application for a smaller framed plane or is it mainly just a sport type of engine? sorry to hear that about the F16..in the photo looks like that prop sat close to the ground too
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Old 02-12-2005, 12:46 AM
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Flyboy Dave
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Default RE: F20 - how fast?

...no, the 1.08 FSR is a hot-rod....make no mistake. It will whoop the snot
off most of the newer 1.08's and 1.20's. It might have done better....

....had I not been using those grey plastic 14" blades out of a garbage disposal.

FBD.
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Old 02-12-2005, 12:34 PM
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Default RE: F20 - how fast?

Well Haveblue- As I recall Daves Dago had a Magnum-91FS in it (Is that right Dave?) and was pretty fast--- It was as fast as my 60 sized F-20 (But mine is no rocket with the TH-75)... I think that Dave has upped the power-plant to a YS-91 I think now... Must be pretty fast

If I had a Dago (and some $) I would run a Jett-90L or a YS-1.10- one guy on here is using an OS-65VRDF engine in his and claims it is VERY fast- I also think a warbird should be 4 cycle equipped but the Dago and Voodoo I classify as Reno Racers so...
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Old 02-13-2005, 01:37 AM
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Default RE: F20 - how fast?

Razor....you are correct....the old Dago Red had an OS .91 in it. It was smooth
and swift as you recall....but the new one with the YS .91 will wipe up the floor
with it....[X(]

A WM Dago Red with a Jett .90 in it would bust a buck and a half....easy.
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Old 02-13-2005, 05:03 AM
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Default RE: F20 - how fast?

FBD..man does that sound good...although its gonna have to wait before I think about getting one of those . For a plane spec'd for a .46, it's rather expensive out this way , I saw one hobby shop list it for $339.00 which is pricey for a plane of this size , its almost as expensive as my 71" span spitfire which runs a 1.20 4 c, and BTW thats how I wound up with a spare OS 1.08 fsr... pity , because the DR is one fine sleek lookin bird....hmmm wonder if I do major reinforcement work to the F20 , if it would hold up to the jett90..doubt it but that DR sure is tempting!!!....at this rate I'll never get that turbine...doesnt matter hot prop jobs are just as much fun and far less techie anyway's

thanks FBD..... you've got me thinkin' now...love the thought of that buck and a half
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Old 02-13-2005, 04:29 PM
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Default RE: F20 - how fast?

Save your $ get some plans and git buiding dude! Thats what I do when I really want one
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Old 02-14-2005, 01:48 AM
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Default RE: F20 - how fast?

Dave,
Raced a friend with a Jett 90 in his Dago and he couldnt beat mine with a OS 70 w/ tune pipe combo. My dago been clocked at 120 and we fly right next to the gulf..
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Old 02-14-2005, 03:06 AM
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Default RE: F20 - how fast?

I hear ya vicman, the age of arf's has spoilt me, I havent built a kit since I got a pilot kit bf 109 come to think of it , its not finished yet!!!, but since reading about and ordering the AKM SU 27, I have been bitten by the building bug..the only problem is ....room... but where there's a will there's a way..as it is I have to remove half a dozen things just to get into my garage...time for a major clean up and organise my own skunk works.....so many planes ..so little time and um ..money to..
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Old 02-14-2005, 03:42 AM
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Default RE: F20 - how fast?

Smitty: What version of the OS-70? Also, what pipe you runnin'?

Hate to be cynical but I have a REAL HARD time believing any OS-70 on ANY pipe could outrun a Jett-90L [X(]
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Old 02-14-2005, 04:51 AM
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Default RE: F20 - how fast?

I'd like to know what props were being turned too. I havent received my jett 90l yet, nor have I seen one howl but from what I've read about the jetts this should not be the case.... this is very interesting
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Old 02-14-2005, 04:10 PM
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Default RE: F20 - how fast?

OS70 4-stroke? Or an older .77 fan engine ?
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