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Grumania Eurofighter.

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Grumania Eurofighter.

Old 01-09-2007, 02:10 PM
  #51  
bmichels
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Default RE: Grumania Eurofighter.

I will be interested to know if a 1,5 liter tank make sence with my "small" WREN 44 or if it is really too much ! ( I like long flight without the stress of the dry tank crash !).

-->So, are there some Eurofighter users who use more than 1Litter tanks ? what flying time do you gets ?
Old 01-09-2007, 03:08 PM
  #52  
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Default RE: Grumania Eurofighter.

i will let you into a little secret.

I flew my Eurofighter with Futaba 3001 Servos 1 per taileron and 1 on tha canard.


I never had any problem at all with it, and that was with a 54 MK3.
The model weighed around 6.8 kilo all up as i recall.


1Ltre tank is all you need.

Paul
Old 01-10-2007, 09:35 AM
  #53  
bmichels
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Default RE: Grumania Eurofighter.

Thanks Paul for the secret !

6.8 kg ALL UP means WITH fuel or Dry weight ?

What flying time did you have with 1 litter (flying time means time before landing with still enough kerozene in the tank for security)
Old 01-10-2007, 09:46 AM
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Default RE: Grumania Eurofighter.

So, since everybody seems to say that 1 litter is enough and that I don't need 1,5 litter, does anyone can recommand a tank, that has the same round shape than a 1,5 litter coke (as as light if possible), but just less long. I

ndeed, the formers are made for a round coke bottle, but the coke bottle is a little too long and hit the front of the turbine (plus I feel that a slightely stronger plastic than the coke plastic will be safer).

thanks
Old 01-10-2007, 09:52 AM
  #55  
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Default RE: Grumania Eurofighter.

ORIGINAL: bmichels

So, since everybody seems to say that 1 litter is enough and that I don't need 1,5 litter, does anyone can recommand a tank, that has the same round shape than a 1,5 litter coke (as as light if possible), but just less long. I

ndeed, the formers are made for a round coke bottle, but the coke bottle is a little too long and hit the front of the turbine (plus I feel that a slightely stronger plastic than the coke plastic will be safer).

thanks
may sound like a joke, but go to a supermarket, beverage departement and you will find for sure 1 liter bottle.

The plastic, or PET is more than enough stronger.
Take one and try to broke her...a friend of mine use them as air tank, and they never exploded
others (kevlar) are for sure heavier...

lighter may be "Plasma bag fuel tank" but they may broke easier..
Old 01-23-2007, 11:24 AM
  #56  
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Default RE: Grumania Eurofighter.

I have started to built the kit and I will keept you informed on the progress.

So many parts to assemble and so little time !!! []

Old 03-10-2007, 06:21 AM
  #57  
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Default RE: Grumania Eurofighter.

Hi Paul.
Inspired by your efforts with the Grumania Eurofighter I have purchased one myself after several e-mail conversations with Ilga Grum the manufacturer. (what a super Guy)
Sadly by kind courtesy of D.H.L. the package was crushed in transit and the fuselage ruined.
This was mid January and at the moment D.H.L. have not even submited a claims form for any compensation.(must be a lesson here)
Did you say you managed to fit a Two-Litre tank in yours.
My current Boomerang flies for about eight minutes on two litres with the same wren 54 mk 3 that you have.I would have liked a Two-Litre tank in the Eurofighter. (if I ever get started.)How did you manage it.
Regards. peterbrown.U.K.
Old 03-10-2007, 06:42 AM
  #58  
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Default RE: Grumania Eurofighter.

Sorry about the Fus.

No, i had a WREN 54 in mine and used a 1.5ltr coke bottle.

This was fine for about 5mins run.
I had no header just an Orbit type clunk avaialable from Dave at Motors and Rotors.

Paul
Old 03-10-2007, 06:53 AM
  #59  
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Default RE: Grumania Eurofighter.

Thanks Paul For swift informative reply.
I hope to get started if and when D.H.L coughs up.
In the meantime I will continue to gaze lovingly at your Photo. (the Eurofighter of course)
Regards. Peter.
Old 03-11-2007, 04:40 AM
  #60  
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Default RE: Grumania Eurofighter.

Mine has been repaired, stripped of colour and re-painted, i flew it again recently, still a great model. I am going to call it Phoenix .[X(]
The pic is a friend of mine with it, doing a preflight prep.

Paul
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Old 03-11-2007, 06:00 AM
  #61  
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Default RE: Grumania Eurofighter.


ORIGINAL: swissflyer

ORIGINAL: bmichels

(plus I feel that a slightely stronger plastic than the coke plastic will be safer).

thanks
may sound like a joke, but go to a supermarket, beverage departement and you will find for sure 1 liter bottle.

The plastic, or PET is more than enough stronger.
Take one and try to broke her...a friend of mine use them as air tank, and they never exploded
others (kevlar) are for sure heavier...

lighter may be "Plasma bag fuel tank" but they may broke easier..
I tested a coke bottle when I was a kid... it took 17 bar (nearly 250 PSI) for it to burst... (nice bang) Before that I "tested" a mineral water bottle: they take considerably less abuse (I was nearly deaf for about a week after that little stunt)
Old 03-23-2007, 02:49 AM
  #62  
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Default RE: Grumania Eurofighter.

Hi Paul.
The good news is that I received a replacement fuselage yesterday from Grumania.

The bad news is that D.H.L. wrecked this one as well and I think this time I will just have to get on and repair it.

The fin is badly cracked on one side about 3" down from the tip. By cutting out the rudder I will get rid of half the crack and gain access to the inside of the fin. Then What??. The crack bulges outwards from the surface of the fin. If I rub it down to flatten it will I rub the surface away.

I immagine I must apply some reinforcement from the inside.

You are the Great Eurofighter Repair Man. Any Ideas.

My only idea is "Don't send your model by D.H.L."

Regards. Peter Brown.
Old 06-07-2007, 05:08 AM
  #63  
bmichels
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Default RE: Grumania Eurofighter.

FOR SALE : My Grumania Kit and Wren 44 (Totaly new)

Well, I decided to drop this project and to focus on the smaller Lambert turbines to built more 1 to 2 kg jets (after my "Kero-Twinjet", I am now building a "Kero-Aeronaut Panther" )


So... I sell 2000€ my Wren44 "full autostart" UNPACKED

and... 625€ ( half price) my Grumania Kit, including JET A1 Gear


The Kit was invoiced as follow bu Grumania for 1250€ :

- Kit Eurofighters 610€
- 1 sets of Microtracts retract units ( Jet-1A) 220€
- 2 electronic valves ( JetTronic) 110€
- 2 main legs,( trailing leg, Jet-1A) 75€
- 1 nose legs ( Jet1A) 35€
- 2 Brakes with brake pads % nipple ( Jet-1A) 43€
- 2 units 60 mm wheels ( Jet1A) 66€
- 1 unit 60 mm light wheels ( nose wheels,Eurokit ) 6€
- 1 air bottles small with nipples ( Jet-1A) 12€
- 1 decal sets Eurofighter 49€
- 1 Pilots , 1/9 Eurofighter


Everything is in Bruxelles, but I go often to Paris

[email protected]
+32 472 208 730
Old 10-05-2007, 04:07 PM
  #64  
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Default RE: Grumania Eurofighter.

Having waited forever for a different 54 sized Eurofighter with nothing forthcoming, I am thinking about buying one of these.

What are the Grumania extras like? Should I use their pipe or a Wren one?

What about gear? It looks like they are using Jet-1A but I am looking to save weight and the Jet-1As are quite hefty. Would Spring Airs be OK in this model?

Any build pics or vids?


Old 10-06-2007, 08:25 AM
  #65  
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Default RE: Grumania Eurofighter.

The retracts are very high quality.
I used the Wren tailpipe.

Paul
Old 10-08-2007, 02:32 AM
  #66  
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Default RE: Grumania Eurofighter.

Very much inspired by Paul Gray's comments in this thread I have purchased my own Grumania Eurofighter.The whole kit is of the highest quality and this includes the accessories including the tailpipipe and the previous mentioned retracts which are indeed Jet-1A.The manufacturer Ilja Grum is a super guy and very helpful over the smallest detail.
My only problem was the packaging and handling by D.H.L. who completely ruined the fibreglass fuselage at the first attempt and after three months of negotiation a second fuselage arived with the fin broken.At this point I cut my losses and repaired the fin.I should be interested to see how you get on??
The kit is a builder's dream but not for the ARTF boys.It includes a CD of build photos which are very helpful. My progress is quite slow as I have decided to build in a working scale airbrake which has slowed down the build process.Also I have only one Engine a Wren 54 Mk-3 and so to complete the Eurofighter I will need to de-commission my trusty Bommerang Intro.
I have lots of build photos already but am not too sure how to attach them to this message. I will try.(N.B. Have tried but cannot achieve transfer)However will be happy to e-mail to you direct if you wish.
Regards. Peter.
Old 10-09-2007, 01:37 AM
  #67  
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Default RE: Grumania Eurofighter.

Further to my last message here hopefully are a couple of pics as a trial
More to follow if successfull
Regards. Peter Brown.
Old 12-16-2007, 12:08 PM
  #68  
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Default RE: Grumania Eurofighter.

hello,

i have also build the grum-EF and i search the best adjustment ( CG and EWD for the canards).how much ° from the neutral-line is the best ?

sorry for bad english ...

cu ulli
Old 12-17-2007, 03:59 AM
  #69  
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Default RE: Grumania Eurofighter.

Hi.
Do you have the building instructions for your Eurofighter.?

On page 5 of my instructions the recommended travel for the canards is 25 to 30 degrees. My model is as yet unflown. Paul Gray is the expert on flying this model and may like to comment on the canard travel.

Also from the instructions on page 5 you will see that the C of G position is engraved on the fuselage at the wing root rib.This is very usefull, I wish more manufacturers did this.

Best wishes. Peter Brown.
Old 05-21-2010, 04:05 PM
  #70  
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Default RE: Grumania Eurofighter.

I'm thinking about one of these again. I've read on another forum about tricky ground handling due to how far forward the main legs are.

Does anyone who has any experience of this model have any comments on the ground handling?
Old 05-21-2010, 04:55 PM
  #71  
HarryC
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Default RE: Grumania Eurofighter.

I think I know which other forum and review you mean! Where did it say the model had tricky ground handling?
H
Old 05-22-2010, 01:08 AM
  #72  
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Default RE: Grumania Eurofighter.

I think you are probably right Harry

Maybe 'tricky ground handling' wasn't an accurate statement but you seemed to suggest that it was very light on the noseleg to the point of the tail wanting to touch the ground.

I have asked Ilja about the possibility of making a set of wings with the main retracts a bit further back but wondered if it was worth the effort or if I should just get a standard kit?
Old 05-22-2010, 03:03 AM
  #73  
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Default RE: Grumania Eurofighter.

Yes it does want to sit back on the tail very easily, however as stated from its first flights done in a crosswind, the take-offs were all straight and easily controlled. It doesn't look good nodding back and forward while taxiiing out, but the handling is fine. As soon as you apply power or brakes, it keeps the nosewheel on the ground. All 11 flights so far have been done in crosswinds and no ground handling problems have been encountered. I am just starting to bring the CG forward a bit to see if that cures a pitch sensitivity on approach to land and that should also help to keep it down on the nosewheel too.
It's a lot of fun to fly, go for it!
H
Old 05-22-2010, 03:12 AM
  #74  
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Default RE: Grumania Eurofighter.

Be careful with the ballast in the nose. Especially when the tank is still full - after take off- the plane gets nasty in tight curves and tends to dive - you should at least be aware of this.

Cheers
Ilja

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